Metadata: Identification_Information: Citation: Citation_Information: Originator: Page C. Valentine Publication_Date: 20260402 Title: Station locations in quadrangle 3 in Stellwagen Bank National Marine Sanctuary offshore of Boston, Massachusetts where video, photographs and sediment samples were collected by the U.S. Geological Survey from 1993-2021 - includes sediment sample analyses and interpreted geologic substrate Edition: 1.0 Geospatial_Data_Presentation_Form: Vector Digital Dataset (Point) Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13PVHRI Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P13PVHRI Online_Linkage: https://www.sciencebase.gov/catalog/item/65d7c9e6d34ec3e1801d814f Larger_Work_Citation: Citation_Information: Originator: Page C. Valentine Originator: VeeAnn A. Cross Publication_Date: 2026 Title: Geospatial datasets of seabed topography, sediment mobility, and the distribution of geologic substrates in quadrangle 3 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Edition: 1.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13PVHRI Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Valentine, P.C., and Cross, V.A., 2026, Geospatial datasets of seabed topography, sediment mobility, and the distribution of geologic substrates in quadrangle 3 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P13PVHRI. Online_Linkage: https://doi.org/10.5066/P13PVHRI Description: Abstract: The U.S. Geological Survey (USGS), in cooperation with the National Marine Sanctuary Program of the National Oceanic and Atmospheric Administration (NOAA), has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary (SBNMS) region since 1993. The interpretive datasets and source information presented here are for quadrangle 3, which is one of 18 similarly-sized quadrangles that comprise the 3,700 square kilometer (km2) SBNMS region. The seabed of SBNMS is a glaciated terrain that is topographically and texturally diverse. Mapping of quadrangle 3 shows the distribution of substrates on the southeastern part of Stellwagen Bank, on adjacent banks and basins in deeper water to the east, in the eastern part of Race Point Channel to the south of the bank, and on the northern slope of Outer Cape Cod. Water depths range from ~25 m on the bank crest to ~135 m east of South Ninety Bank which lies off the eastern margin of Stellwagen Bank. The data presented here for quadrangle 3 are the foundation for Scientific Investigations Map 3544 (Valentine and Cross, 2026), which presents maps of seabed topography, ruggedness, backscatter intensity, distribution of geologic substrates, sediment mobility, distribution of fine- and coarse-grained sand, and substrate mud content. For the quadrangle 3 interpretation, data from 309 ground validation stations were analyzed, including 279 sediment samples. The geologic substrate maps of quadrangle 3 show the distribution of 21 substrates that represent a wide range of textures, such as rippled sand, immobile sand, immobile muddy sand, sand that partially veneers gravel, and boulder ridges. Not all of these substrates can be mapped as individual polygons as some scattered deposits are not coherent units mappable at the given scale. Substrate types are defined or inferred by sediment grain-size composition, surface morphology, sediment layering, the mobility or immobility of substrate surfaces, and water depth range. Scientific Investigations Map 3544 portrays the major geological elements (substrates, topographic features, processes) of environments within quadrangle 3. It is intended to be a basis for the study of sediment transport processes that affect a shallow, offshore bank and adjacent basins, for the study of the ecological requirements of invertebrate and vertebrate species that use these substrates, and to support seabed management in the region. Purpose: This shapefile contains quadrangle 3 station locations, interpreted geologic substrate at each location, and description of sampling type (sediment sample, video, photograph). Station locations that have sediment samples include the sediment analyses data. These stations represent information used in the geologic interpretation. Supplemental_Information: Over 50 scientific cruises have been conducted in an effort to map Stellwagen Bank. For this interpretation of quadrangle 3 on Stellwagen Bank, ground-truth stations on the following 23 USGS WHCMSC field activities have played a vital role: 1993-030-FA, 1995-012-FA, 1995-015-FA, 1996-025-FA, 2013-044-FA, 2014-015-FA, 2014-055-FA, 2014-066-FA, 2015-017-FA, 2015-062-FA, 2016-004-FA, 2016-012-FA, 2016-038-FA, 2016-039-FA, 2017-030-FA, 2017-044-FA, 2018-027-FA, 2018-028-FA, 2018-029-FA, 2019-007-FA, 2019-008-FA, 2020-012-FA, and 2021-016-FA. More information on each of these activities can be found by replacing the XXXX in the following URL with the cruise ID: https://cmgds.marine.usgs.gov/fan_info.php?fan=XXXX. For example: https://cmgds.marine.usgs.gov/fan_info.php?fan=1993-030-FA. These data have a companion report that provides the additional details and information related to the interpretation and methods. Additionally, the report contains PDF maps of the seabed interpretation. That companion report is Valentine, P.C., and Cross, V.A., 2026, Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 3 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts: U.S. Geological Survey Scientific Investigations Map 3544, 8 sheets, scale 1:25,000, 30-p. pamphlet, https://doi.org/10.3133/sim3544. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1993 Ending_Date: 2021 Currentness_Reference: Ground condition of data acquired at stations. However, the currentness reference for the geologic substrate attributes is the publication date - 2026. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.22157 East_Bounding_Coordinate: -70.03538 North_Bounding_Coordinate: 42.20272 South_Bounding_Coordinate: 42.09603 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Esri point shapefile Theme_Keyword: Excel spreadsheet Theme_Keyword: seabed geology Theme_Keyword: geologic substrates Theme_Keyword: substrate geology Theme_Keyword: video stations Theme_Keyword: sediment samples Theme_Keyword: photo stations Theme_Keyword: sediment sample locations Theme_Keyword: sediment analysis Theme_Keyword: grain size Theme_Keyword: U.S. Geological Survey Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: National Oceanic and Atmospheric Administration Theme_Keyword: NOAA Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme_Keyword: environment Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: marine geology Theme_Keyword: sea-floor characteristics Theme_Keyword: geospatial datasets Theme_Keyword: scientific interpretation Theme_Keyword: geology Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:65d7c9e6d34ec3e1801d814f Place: Place_Keyword_Thesaurus: None Place_Keyword: Stellwagen Bank Place_Keyword: Stellwagen Bank National Marine Sanctuary Place_Keyword: Massachusetts Place_Keyword: Boston, Massachusetts Place_Keyword: Massachusetts Bay Place_Keyword: U.S. east coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Atlantic Ocean Access_Constraints: No access constraints. Please see 'Distribution Information' for details. Use_Constraints: These data are marked with a Creative Commons CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Page C. Valentine Contact_Position: Research Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-548-8700 x2239 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with the USGS. Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/65d7c9e6d34ec3e1801d814f?name=q3_stations_geology_browse.png&allowOpen=true Browse_Graphic_File_Description: Thumbnail image showing the station locations used in the geologic interpretation of the sea floor in quadrangle 3 of Stellwagen Bank National Marine Sanctuary. Browse_Graphic_File_Type: PNG Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 10; ArcMap 10.8.1 Cross_Reference: Citation_Information: Originator: P. Valentine Originator: D. Blackwood Originator: K. Parolski Publication_Date: 2000 Title: Seabed observation and sampling system Series_Information: Series_Name: U.S. Geological Survey Fact Sheet Issue_Identification: FS-142-00 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This publication gives an overview description of the SEABOSS system. The details have changed over the years with updated equipment, but the concept has not changed. Online_Linkage: https://doi.org/10.3133/fs14200 Cross_Reference: Citation_Information: Originator: D.S. Blackwood Originator: K.F. Parolski Publication_Date: 2001 Title: Seabed observation and sampling system Series_Information: Series_Name: Sea Technology Issue_Identification: v. 42, no. 2, p.39-43 Other_Citation_Details: This publication gives an overview description of the SEABOSS system. The details have changed over the years with updated equipment, but the concept has not changed. Cross_Reference: Citation_Information: Originator: L.J. Poppe Originator: S.J. Williams Originator: V.F. Paskevich Publication_Date: 2014 Title: U.S. Geological Survey east-coast sediment analysis: Procedures, database, and GIS data Edition: 3.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1001 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This publication contains the definitions of some of the attributes contained in this dataset. Online_Linkage: https://doi.org/10.3133/ofr20051001 Cross_Reference: Citation_Information: Originator: Page C. Valentine Originator: Leslie B. Gallea Publication_Date: 2015 Title: Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 6 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3341 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This publication contains the equivalent information as this data release, but for quadrangle 6. This publication also provides the additional details and information related to the interpretation and methods as well as PDF maps of the seabed interpretation. Online_Linkage: https://doi.org/10.3133/sim3341 Cross_Reference: Citation_Information: Originator: Page C. Valentine Publication_Date: 2019 Title: Sediment classification and the characterization, identification, and mapping of geologic substrates for the glaciated Gulf of Maine seabed and other terrains, providing a physical framework for ecological research and seabed management Series_Information: Series_Name: Scientific Investigations Report Issue_Identification: 2019-5073 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This document describes the methodology developed to map the glaciated terrain characterized by geologic substrates that typify a wide range of erosional and depositional sediment environments. This methodology is what was used in this dataset. Online_Linkage: https://doi.org/10.3133/sir20195073 Cross_Reference: Citation_Information: Originator: Page C. Valentine Originator: VeeAnn A. Cross Publication_Date: 2024 Title: Geospatial datasets of seabed topography, sediment mobility, and the distribution of geologic substrates in quadrangle 5 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9W9BN3S Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This data release contains the equivalent information as this data release, but for quadrangle 5. Online_Linkage: https://doi.org/10.3133/P9W9BN3S Cross_Reference: Citation_Information: Originator: Page C. Valentine Originator: VeeAnn A. Cross Publication_Date: 2024 Title: Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 5 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3515 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This report is the companion publication of the data release for quadrangle 5 that provides the additional details and information related to the interpretation and methods. Additionally, the report contains PDF maps of the seabed interpretation. The report also provides additional references related to the work in Stellwagen Bank National Marine Sanctuary. Online_Linkage: https://doi.org/10.3133/sim3515 Cross_Reference: Citation_Information: Originator: Page C. Valentine Originator: VeeAnn A. Cross Publication_Date: 2024 Title: Geospatial datasets of seabed topography, sediment mobility, and the distribution of geologic substrates in quadrangle 2 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9UL3LWN Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This data release contains the equivalent information as this data release, but for quadrangle 2. Online_Linkage: https://doi.org/10.3133/P9UL3LWN Cross_Reference: Citation_Information: Originator: Page C. Valentine Originator: VeeAnn A. Cross Publication_Date: 2024 Title: Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 2 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3530 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This report is the companion publication to the data release for quadrangle 2 that provides the additional details and information related to the interpretation and methods. Additionally, the report contains PDF maps of the seabed interpretation and additional references related to the work in Stellwagen Bank National Marine Sanctuary. Online_Linkage: https://doi.org/10.3133/sim3530 Cross_Reference: Citation_Information: Originator: Page C. Valentine Originator: VeeAnn A. Cross Publication_Date: 2026 Title: Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 3 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3544 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This report is the companion publication of the data release that provides the additional details and information related to the interpretation and methods. Additionally, the report contains PDF maps of the seabed interpretation. The report also provides additional references related to the work in Stellwagen Bank National Marine Sanctuary. Online_Linkage: https://doi.org/10.3133/sim3544 Data_Quality_Information: Logical_Consistency_Report: All of the sediment samples were processed at the Woods Hole Coastal and Marine Science Center sediment lab. In most cases, the presence or absence of ripples was based on the video footage. If no video files were available, the value for ripples was set to 9999. The depths in this file are based on the ship fathometer or the SEABOSS depth sensor and differ from the information in the abstract derived from the more accurate swath bathymetry dataset. Completeness_Report: All stations used to derive the geologic substrate interpretation of quadrangle 3 are included in this dataset. Many of the project sites were sampled repetitively over this time period and not all data collected was required to compile the geologic substrate interpretation. Instances occurred where the grab sampler could not obtain a viable sample for complete sediment analysis, but the presence of cobble(s) in the sampler did give insight as to the geologic substrate. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: These data were navigated with a differential global position system (DGPS) that varied depending on year of collection. These DGPS locations are assumed to be accurate to +/- 10 meters horizontally. During deployment, the camera system hangs below the side of the ship, and the recorded navigation data closely approximates the position of the camera system near the seabed. The ship is oriented so that wind and waves will not cause it to drift over the conducting cable attached to the SEABed Observation and Sampling System (SEABOSS). Considering navigation system accuracy, cable out, location of navigation antenna relative to camera system deployment, these locations are assumed to be accurate +/- 30 meters. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Depth values were acquired by two methods. Depth was acquired using the ship fathometer until 1998. For 1998 and 1999, depth was acquired using the depth sensor on the SEABOSS. Starting again in 2013, depth values were acquired using the ship fathometer. Depth values were rounded to the nearest meter to account for ship motion. No adjustment was made for tides or transducer depth in the case of using the ship fathometer. Depths are assumed to be accurate to within 5 meters, generally assumed to be accurate to +/- 2 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished material Title: SEABOSS photographs and video of the sea floor Type_of_Source_Media: film and digital media Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1993 Ending_Date: 2021 Source_Currentness_Reference: ground condition of originally collected data Source_Citation_Abbreviation: SEABOSS Source_Contribution: The SEABed Observation and Sampling System (SEABOSS) was designed by the U.S. Geological Survey (USGS) for rapid and effective collection of seabed images and sediment samples in coastal regions. The observations from video and still cameras and the sediment data are used to explore the nature of the seafloor and, in conjunction with high-resolution geophysical data, to make interpretive maps of sedimentary environments and validate the acoustic remote sensing data. The SEABOSS is a simple system that can be deployed from both small and large surface vessels and operates in water depths up to 200 m. Although the configuration has been modified over the years, it typically incorporates two video cameras, a still camera, a depth sensor, and a modified Van Veen sediment sampler. The elements of the SEABOSS system used on Stellwagen Bank are housed within a stainless-steel framework that measures 1.2 x 1.2 meters and weighs approximately 136 kilograms overall. The frame has a stabilizer fin that orients the system as it drifts over the seabed. The height of the camera above the seabed (76 cm; 30 in) initially was determined by viewing an object hanging from the SEABOSS below the video camera; when the object touched the seabed, the camera height was appropriate for still photography. Later in the project, the camera height was determined by viewing a pattern of laser beams on the seabed. Two parallel lasers are set 20 cm apart on the SEABOSS frame and project onto the seabed for scale measurements. All of the system's elements that require power are powered from the surface vessel through a conducting cable. Video displays typically include station number, water depth (from the depth sensor), and date, time, and geographic position (provided by a shipboard navigation system). More recent cruises (the AUK cruises included in this dataset, 2015 and later) collected video images using a battery-operated, high-definition (1920 x 1080 pixels) GoPro digital video camera. During deployment, the camera system hangs directly below the side of the ship, and the recorded navigation data closely approximates the position of the camera system near the seabed. The ship is oriented so that wind and waves will not cause it to drift over the conducting cable attached to the SEABOSS. The winch operator uses a video feed from the system to maintain the camera at the proper height above the seabed and to avoid obstacles. The scientist uses the video to decide when to take a grab sample of seabed sediment. Process_Step: Process_Description: A subset of the published sediment sample analyses of Stellwagen Bank National Marine Sanctuary was separated based on station locations falling within quadrangle 3. Additionally, stations where either video or bottom photographs that fell within quadrangle 3 were also extracted from previously published datasets. These datasets were combined into a single Microsoft Office Excel 2010 spreadsheet. Additional columns of information were added to reflect whether the location marks a sediment sample location, a station that collected video, or a station that collected bottom photographs. A station can collect any combination of these types of information. Columns were also added to reflect the interpreted geologic substrate at the station location. Typically, the SEABOSS system would be deployed to the sea floor and the ship would drift while video and photos were recorded. When sediment samples were collected, they were acquired at the end of the drift or occasionally during the drift. Sediment sample locations are given as the position of the actual sediment sample. For stations where just video and/or photographs were acquired, the location marks the end of the station drift. Original work to compile these data started in 2016, and was completed in 2023, with the final work on the spreadsheet occurring in Microsoft Office 365 Excel software. Process_Date: 2023 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Page C. Valentine Contact_Position: Research Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2239 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: pvalentine@usgs.gov Process_Step: Process_Description: Numeric fields in the Excel spreadsheet with null values (blanks) were set to 9999. Process_Date: 2023 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Page C. Valentine Contact_Position: Research Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2239 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: pvalentine@usgs.gov Process_Step: Process_Description: The Excel spreadsheet was edited to include a third row of column headers that would be compatible with Esri shapefile attribute headings. Temporarily removing the first two rows of the spreadsheet, the spreadsheet was then exported as a CSV MS-DOS file using Excel 365. The original spreadsheet with the two additional rows of information is included in the dataset. Process_Date: 2023 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02556 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: The comma-delimited text file was added to ArcMap 10.8.1 using the Add XY Data tool. The X Field was set to longitude and the Y Field was set to latitude. The coordinate system was defined as a geographic coordinate system, NAD83. The event theme was then converted to a shapefile by right mouse clicking the event theme and exporting to a shapefile (q3_stations_geology.shp) with a geographic, NAD83 coordinate system. Process_Date: 2023 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02556 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 309 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_North_American_1983 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Local surface Depth_Resolution: 1 Depth_Distance_Units: meters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: q3_stations_geology Entity_Type_Definition: Station locations of bottom video, bottom photographs, and sediment samples as well as sediment analysis used in the interpretation of the sea floor geology of quadrangle 3 on Stellwagen Bank. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: SBNMS_ID Attribute_Definition: USGS Stellwagen Bank National Marine Sanctuary (SBNMS) station number assigned in the field. In some instances, multiple transects of photo and (or) video collection were conducted at approximately the same site and assigned the same station number. These instances are noted by a decimal number. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Although the field is a numeric field, the decimal portion of the number does not represent a fraction of a station but rather another approximate occupation of the same station. In other published versions of the data the multiple sites were annotated by a letter after the station number such that instead of 3131.1, it would be 3131a. Attribute: Attribute_Label: SUBSTR_SYM Attribute_Definition: Substrate unit symbol abbreviation corresponding to the interpreted geologic substrate (SUBSTRATE attribute) for that sample location. Not all of these substrates are mappable as individual polygons in the associated q3_geologic_interp polygon shapefile available from the Larger Work citation. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: A1 Enumerated_Domain_Value_Definition: Abbreviated symbol for A1 r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: A2 Enumerated_Domain_Value_Definition: Abbreviated symbol for A2 i_cgS where i = immobile, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: A3 Enumerated_Domain_Value_Definition: Abbreviated symbol for A3 r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: C Enumerated_Domain_Value_Definition: Abbreviated symbol for C i_cbG where i = immobile, c = cobble, b = boulder, G = gravel Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: F Enumerated_Domain_Value_Definition: Abbreviated symbol for F i_cgS / pcbG where i = immobile, cgS = coarse-grained sand, / = overlying, or partial veneer over p = pebble, c = cobble, b = boulder g = gravel Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: G1 Enumerated_Domain_Value_Definition: Abbreviated symbol for G1 i_mfgS where i = immobile, m = muddy, fgS = fine-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Y Enumerated_Domain_Value_Definition: Abbreviated symbol for Y r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Z Enumerated_Domain_Value_Definition: Abbreviated symbol for Z r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AC Enumerated_Domain_Value_Definition: Abbreviated symbol for AC r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AI Enumerated_Domain_Value_Definition: Abbreviated symbol for AI r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AJ Enumerated_Domain_Value_Definition: Abbreviated symbol for AJ i_cgS where i = immobile, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AK Enumerated_Domain_Value_Definition: Abbreviated symbol for AK i_cgS / pcbG where i = immobile, cgS = coarse-grained sand, / = overlying, or partial veneer over p = pebble, c = cobble, b = boulder g = gravel Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AL Enumerated_Domain_Value_Definition: Abbreviated symbol for AL r_gcgS / i_pcG where r = rippled, g = gravelly, cgS = coarse-grained sand, / = overlying, or partial veneer over i = immobile, p = pebble, c = cobble, g = gravel Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AM Enumerated_Domain_Value_Definition: Abbreviated symbol for AM r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AN Enumerated_Domain_Value_Definition: Abbreviated symbol for AN r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AO Enumerated_Domain_Value_Definition: Abbreviated symbol for AO r_cgS where r = rippled, cgS = coarse-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AP Enumerated_Domain_Value_Definition: Abbreviated symbol for AP r_cgS / i_pcbG where r = rippled, cgS = coarse-grained sand, / = overlying, or partial veneer over i = immobile, p = pebble, c = cobble, b = boulder g = gravel Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AQ Enumerated_Domain_Value_Definition: Abbreviated symbol for AQ r_fgS where r = rippled, cgS = fine-grained sand Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey Attribute: Attribute_Label: SUBSTRATE Attribute_Definition: Geologic substrate unit name that designates a unique substrate area on the seabed of quadrangle 3. Not all of these substrates are mappable as individual polygons in the associated q3_geologic_interp polygon shapefile available from the Larger Work citation. Not all substrates defined here have sample locations in them. However, those substrate definitions are included when that substrate is used in the definition of another substrate. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: A1 r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate A1 is a mobile, coarse-grained sand deposit that covers the southeastern part of Stellwagen Bank and its flank and the eastern approaches to Race Point Channel. It occupies 74.7 km2 or 40.4 percent of the mapped area of quadrangle 3. Water depth range of the stations is 32 to 59 m and of the mapped substrate 30 to 60 m. Mean weight percents of aggregates and composite grades: mud, <1; sand, 94 (fgS, 2; cgS, 92); gravel, 6 (G1, 6; G2, <1). The substrate extends westward onto the southwestern part of the bank in quadrangle 2 (fig. 1; Valentine and Cross, 2024), and northward onto the eastern flank of the bank in quadrangle 6 (fig. 1; Valentine and Gallea, 2015). Substrate A1 is dominantly coarse-grained sand and is very low in mud and fine-grained sand content. Its surface is smooth as observed in multibeam topographic imagery, but video imagery reveals the substrate’s surface is covered with sand ripples with wavelengths of 0.5 to 1.0 m; the orientation of ripple crests varies from N-S to NW-SE. The ripples are symmetrical and well-shaped (sometimes with narrow, sharply-defined crests and sometimes with broad crests hosting secondary ripples) when first formed by storm-wave generated currents, but they subsequently are rounded by faunal disturbance and flattened by bottom-tending fishing gear such as dredges and trawls. Those stations that occur in the A1 polygon that are not documented with video imagery or that do not display sand ripples because they have been disturbed by fishing gear are nevertheless characterized as “rippled” by analogy to the many nearby stations in A1 that exhibit ripples in video imagery. Substrate A1 is texturally similar to substrate Z that is recognized as a separate substrate because it lies in deeper water in Race Point Channel south of Stellwagen Bank and contains slightly more fine-grained sand. Substrate A1 is similar in its mud and overall sand content to substrate A3. However, substrate A3 contains more fine-grained sand (13 wt pct). Each sample from A3 generally contains 10 wt pct or more of fine-grained sand, mostly as 3 phi sand, and its surface is covered with smaller ripples. Substrate A3 deposits occur within the areas occupied by substrates A1, Z, and AN and are not mappable as a coherent unit at the present scale. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: A2 i_cgS Enumerated_Domain_Value_Definition: Immobile, coarse-grained sand. Substrate A2 is an immobile, coarse-grained sand deposit that lies along the southeastern flank of Stellwagen Bank and in the deeper eastern approaches to Race Point Channel. It occupies 10.7 km2 or 5.8 percent of the mapped area of quadrangle 3. Water depth range of the stations is 59 to 73 m and of the mapped substrate 55 to 80 m. Mean weight percents of aggregates and composite grades: mud, 1; sand, 98 (fgS, 10; cgS, 88); gravel, 2 (G1, 2; G2, 0). Substrate A2 is dominantly coarse-grained sand and is very low in mud and fine-grained sand content. Its surface is unrippled in contrast to adjacent mobile substrate A1 which lies in shallower depths (30-60 m) to the west and contains less fine-grained sand (2 wt pct). Substrate A2 is bounded in deeper water to the east by substrate E, also an immobile, coarse-grained sand and by substrate G1, a muddy, fine-grained sand. Substrates A2, E, and G1 all extend northward into adjacent quadrangle 6 (fig. 1; Valentine and Gallea, 2015). Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: A3 r_cgS Enumerated_Domain_Value_Definition: This is not mappable as a separate polygon but included because of references to the unit elsewhere in the document. Rippled, coarse-grained sand. Substrate A3 is a collection of mobile, coarse-grained sand deposits that lie within the areas occupied by substrates A1, Z, and AN. Water depth range of stations is 42 to 55 m. Mean weight percents of aggregates and composite grades: mud, <1; sand, 98 (fgS, 13; cgS, 85); gravel, 2 (G1, 2; G2 0). It is also present as scattered deposits on the crest and western flank of the bank in adjacent quadrangle 5 to the northwest (fig. 1; Valentine and Cross, 2024). Substrate A3 is similar texturally to substrate A1 in having a very low mud content. It differs from A1 in having more fine-grained sand (each sample generally contains 10 wt pct or more of fine-grained sand, mostly as 3 phi sand), and its surface ripples are much smaller, with wavelengths of 10 to 20 cm. Substrate A3 is also similar to substrate A2. They both contain more fine-grained sand than substrate A1, but A2 has less fine-grained sand than A3, is immobile, and lies at deeper water depths (55-80 m). The scattered deposits identified as substrate A3 occur within areas mapped as substrates A1, Z, and AN and are not mappable as a coherent unit at the present scale. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: C i_cbG Enumerated_Domain_Value_Definition: Immobile, cobble, boulder gravel. Substrate C is represented by five boulder ridges (piled cobbles and boulders) that occur in four locations in quadrangle 3. They occupy 0.7 km2 or 0.4 percent of the mapped area of the quadrangle and occur in water depths of >25 to 87 m. The shape and relief of the boulder ridges are based on interpretation of multibeam topographic imagery and on the substrate’s high reflectivity in backscatter imagery, typical of boulder ridges mapped in quadrangles 5 (Valentine and Cross, 2024) and 6 (Valentine and Gallea, 2015). A sinuous boulder ridge with an east-west orientation is present in the southern part of Race Point Channel. It is approximately 1.5 km long and 0.1 km wide, lies in water depths of >55 to 58 m, and is surrounded by gravelly substrate AK. A single station lies within the bounds of this boulder ridge. Two adjacent boulder ridges are present on the southern margin of Race Point Channel near the southern limit of the quadrangle 3 mapped area. The westernmost ridge is 0.5 km long and 0.1 km wide and is oriented approximately east-west. The easternmost ridge extends southward past the map boundary and is at least 0.7 km long and 0.2 km wide and is oriented northwest-southeast. They lie in water depths of >25 to <35 m and are surrounded by substrate AO. A single boulder ridge is present on the southern flank of Race Point Channel in water depths of <30 to 36 m. The feature is approximately 500 m long, 200 m wide, and is oriented NE-SW, normal to the trend of the sediment ridges of substrate AP which surrounds it. Another boulder ridge forms a low feature that trends NW-SE along the southwest margin of South Ninety Bank in water depths of 85 to 87 m; it is surrounded by substrate F which occupies the summit of South Ninety Bank. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: E i_cgS Enumerated_Domain_Value_Definition: Immobile, coarse-grained sand. Substrate E is an immobile, coarse-grained sand deposit that lies in a shallow valley between the southeastern flank of Stellwagen Bank and the western flank of South Ninety Bank. It occupies 0.3 km2 or 0.2 percent of the mapped area of quadrangle 3. Water depth range of the substrate is 75 to 80 m. It separates substrate A2 to the west from substrate G1 that lies on the western flank of South Ninety Bank in deeper water to the east. Substrate E is not represented by any samples in quadrangle 3, and it is interpreted to be a short extension (1.5 km) of substrate E mapped in adjacent quadrangle 6 to the north and to be similar texturally (fig. 1; Valentine and Gallea, 2015). Although no samples in this data release occur within this unit, this definition is included because the unit is referred to by another unit definition. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: F i_cgS / pcbG Enumerated_Domain_Value_Definition: Immobile, coarse-grained sand; partial veneer on pebble, cobble, boulder gravel. Substrate F is a layered substrate of immobile, coarse-grained sand that partially veneers pebble, cobble, boulder gravel. It lies on the southern part of the top of South Ninety Bank. It occupies 3.1 km2 or 1.7 percent of the mapped area of quadrangle 3. Water depth range of the stations is 87 to 97 m and of the mapped substrate 85 to 115 m. Mean weight percents of aggregates and composite grades of the two samples from the sediment partial veneer overlying the gravel: mud, 5; sand, 56 (fgS, 40; cgS, 16); gravel, 39 (G1, 15; G2, 24). The high gravel content is interpreted to represent gravel particles inadvertently collected from the gravel substrate located below the partial veneer of sand. The seabed on the northern part of the top of South Ninety Bank lies in adjacent quadrangle 6 and was mapped as substrate F (Valentine and Gallea, 2015). The seabed on the southern part of the bank top lies in quadrangle 3 and is also mapped here as substrate F. The assignment of this area to substrate F requires explanation. On the northern part of the bank, the grain size of sand is variable; coarse-grained sand is dominant on the bank top (3 stations) and fine-grained sand content (2 stations) increases with water depth on the bank’s flank (Valentine and Gallea, 2015). By contrast, on the southern part of the bank top in quadrangle 3, in the two samples collected, the content of fine-grained sand is greater than coarse-grained sand. Nevertheless, this area is identified as substrate F because sediment texture data here are variable and sparse; and it is unlikely that the northern and southern parts of this relatively smooth and flat bank top are occupied by different substrates, as the multibeam sonar bathymetric and backscatter imagery (Valentine, 2005) show the seabed on the bank top to be of similar character in both quadrangles. More sediment sampling is required to verify this interpretation. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: G1 i_mfgS Enumerated_Domain_Value_Definition: Immobile, muddy, fine-grained sand. Substrate G1 is an immobile, muddy, fine-grained sand deposit that lies on the southern flank of South Ninety Bank and in the deeper waters of the basins to the east and south of it. It occupies 17.8 km2 or 9.6 percent of the mapped area of quadrangle 3. This substrate has been mapped in a similar topographic setting on the northern flank of South Ninety Bank and in its adjacent basins in quadrangle 6 to the north (fig. 1; Valentine and Gallea, 2015). Water depth range of the stations is 78 to 126 m and of the mapped substrate 70 to 130 m. Mean weight percents of aggregates and composite grades: mud, 6; sand, 88 (fgS, 69; cgS, 20); gravel, 6 (G1, 3; G2, 3). Substrate G1 in quadrangle 3 contains only 6 mean weight percent mud, which is less than the 10 weight percent required for it to be characterized as a “muddy” sediment (Valentine, 2019). However, because the weight percent mud composition of the 9 samples (range 1-16, mean 6) collected from quadrangle 3 is very similar to the weight percent mud composition of the 39 samples (range 2-18, mean 10) collected from substrate G1 in quadrangle 6 (Valentine and Gallea, 2015), and because of its similar topographic setting, the substrate mapped as G1 in quadrangle 3 is identified as a muddy, fine-grained sand for consistency with its occurrence in adjacent quadrangle 6 to the north. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Y r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate Y is a mobile, coarse-grained sand deposit lying in the eastern part of Little Stellwagen Basin. It occupies 2.0 km2 or 1.1 percent of the mapped area of quadrangle 3. Water depth range of the stations is 62 to 63 m and of the mapped substrate 60 to 63 m. Mean weight percents of aggregates and composite grades: mud, 3; sand, 96; (fgS, 36; cgS, 60); gravel, 1 (G1, 1; G2, 0). Substrate Y lies in the southwestern part of quadrangle 3 and extends westward into quadrangle 2 (fig. 1; Valentine and Cross, 2024). It lies to the west of substrate AC, in somewhat deeper water, and contains more fine-grained sand (36 wt pct) than substrate AC (12 wt pct). Substrate Y is bounded to the south by the northern margin of Cape Cod occupied by substrates AG and AQ. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Z r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate Z is a mobile, coarse-grained sand deposit. It lies in Race Point Channel at the base of Stellwagen Bank. It occupies 13.5 km2 or 7.3 percent of quadrangle 3. Water depth range of the stations and of the mapped substrate is 43 to 62 m. Mean weight percents of aggregates and composite grades: mud, 1; sand, 97; (fgS, 5; cgS, 91); gravel, 3 (G1, 2; G2, 1). It is bounded to the north by substrate A1 on Stellwagen Bank and is differentiated from it because it lies in somewhat deeper water in Race Point Channel and because it contains more fine-grained sand (5 wt pct) than substrate A1 (2 wt pct). As observed in multibeam topographic imagery, substrate Z has a relatively smooth surface. In Race Point Channel, it is bounded by a range of sand substates including substrates AI and AN to the east, and AC and AM to the south. Also, to the south it abuts AK, a layered substrate of sand that partially veneers gravel. Substrate Z extends westward from quadrangle 3 into quadrangle 2 (fig. 1; Valentine and Cross, 2024). Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AC r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate AC is a mobile, coarse-grained sand deposit that lies in the southern part of Race Point Channel. It occupies 1.4 km2 or 0.8 percent of quadrangle 3. Water depth of the one station is 59 m and of the mapped substrate 59 to 60 m. Weight percents of aggregates and composite grades of the one sample: mud, 2; sand, 98 (fgS, 12; cgS, 86; gravel, <1 (G1, <1; G2, 0). The substrate’s surface displays bedforms (50-100 m wavelength) observable in multibeam topographic imagery that trend NW-SE, approximately normal to the trend of Race Point Channel. They resemble bedforms present in the northern part of substrate AM to the east. Substrate AC is bounded to the east by substrate AK. It is bounded to the west by substrates Y and Z whose surfaces are smooth as observed in multibeam topographic imagery. Based on the presence of its distinctive bedforms, substrate AC extends westward for a short distance into quadrangle 2 (Valentine and Cross, 2024). Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AG r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate AG is a mobile, coarse-grained sand deposit that lies on the south flank of Little Stellwagen Basin north of Cape Cod and extends westward into quadrangle 2 (Valentine and Cross, 2024). It occupies 0.3 km2 or 0.2 percent of the mapped area of quadrangle 3. It is not represented by any samples in quadrangle 3, and it is interpreted to be a short extension of substrate AG from adjacent quadrangle 2 to the west (Valentine and Cross, 2024) and to have a similar sediment texture with a mean mud content of <1 weight percent. Its occurrence in quadrangle 3 is based on interpretation of multibeam topographic and backscatter imagery. Water depth range of the mapped substrate is 50 to 60 m. The surface of substrate AG is covered with storm-generated sand ripples. To the east, along the northern slope of Cape Cod, it abuts substrate AQ, a rippled, fine-grained sand. Although no samples in this data release occur within this unit, this definition is included because the unit is referred to by another unit definition. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AI r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate AI is a mobile, coarse-grained sand deposit. It lies in the central part of Race Point Channel between Stellwagen Bank to the north and Cape Cod to the south. It occupies 4.4 km2 or 2.4 percent of the mapped area of quadrangle 3. Water depth range of the stations is 43 to 49 m and of the mapped substrate 43 to 55 m. Mean weight percents of aggregates and composite grades: mud, <1; sand, 90 (fgS, 4; cgS, 85); gravel, 10 (G1, 6; G2, 5). Substrate AI is characterized by areas of smooth seabed separated by areas of subparallel ridges aligned dominantly NW-SE as observed in multibeam topographic imagery. Two samples collected from the ridges are gravelly, coarse-grained sand, suggesting that just below the surface substrate the ridges are gravelly and possibly represent partially buried iceberg keel marks (see substrate AP below). Substrate AI is bounded to the north by substrates AL and AN, to the east by substrate A1, to the south by substrate AP, and to the west by substrate Z. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AJ i_cgS Enumerated_Domain_Value_Definition: Immobile, coarse-grained sand. Substrate AJ is an immobile, coarse-grained sand deposit that lies on the top of a small, unnamed bank located southeast of South Ninety Bank. It occupies 0.2 km2 or 0.1percent of the mapped area of quadrangle 3. Water depth of the single sample is 111 m and of the mapped substrate 110 to 111 m. Weight percents of aggregates and composite grades of the single sample: mud, 9; sand, 88 (fgS, 29; cgS, 59); gravel, 3 (G1, 3; G2, 0). It is surrounded in deeper water by substrate G1. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AK i_cgS / pcbG Enumerated_Domain_Value_Definition: Immobile, coarse-grained sand; partial veneer on pebble, cobble, boulder gravel. Substrate AK is a layered substrate of immobile coarse-grained sand that partially veneers pebble, cobble, boulder gravel. It lies in the southcentral part of Race Point Channel where it occupies 2.7 km2 or 1.4 percent of the mapped area of quadrangle 3. Water depth range of the stations is 57 to 61 m and of the mapped substrate 55 to 61 m. Mean weight percents of aggregates and composite grades of the very thin sediment partial veneer overlying gravel: mud, 4; sand, 82; (fgS, 11; cgS, 71); gravel, 14 (G1, 4; G2, 9). The substrate is interpreted to be immobile because only two of 10 stations with video imagery show ripples, and they are very poorly developed in the thin, patchy sand that veneers the gravel at some stations. The gravel element of the substrate is documented by video imagery. The substrate’s hummocky surface as observed in multibeam topographic imagery exhibits high reflectivity in backscatter imagery, typical of a hard substrate. Multibeam topographic imagery is the basis for the mapped geographic extent of the substrate. Substrate AK surrounds an east-west trending boulder ridge (substrate C). Substrate AK is bounded on all sides by substrates of rippled sand, which include, substrate Z to the north, substrate AM to the east and southeast, substrate AQ to the south, and substrate AC to the west. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AL r_gcgS / i_pcG Enumerated_Domain_Value_Definition: Rippled, gravelly, coarse-grained sand; partial veneer on pebble, cobble, boulder gravel. Substrate AL is a layered substrate of mobile, gravelly, coarse-grained sand that partially veneers immobile pebble, cobble gravel. It lies in two separate areas on topographic highs in the northeastern part of Race Point Channel south of Stellwagen Bank. It occupies 2.9 km2 or 1.6 percent of the mapped area of quadrangle 3. Water depth range of the stations is 46 to 53 m and of the mapped substrate 45 to 53 m. Mean weight percents of aggregates and composite grades of the sediment partial veneer overlying gravel: mud, <1; sand, 56 (fgS, 17; cgS, 39); gravel, 44 (G1, 5; G2, 39). Pebbles and cobbles are identified based on video imagery. At some stations substrate AL is a gravel pavement with little or no sand veneer. The substrate’s surface exhibits high reflectivity in multibeam backscatter imagery, typical of a hard substrate; and the mapped geographic extent of the substrate is based on backscatter imagery. The western area of substrate AL is surrounded by substrate AN. The eastern area of substrate AL is bounded to the north and west by substrate AN, to the east by substrate A1, and to the south by substrate AI. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AM r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate AM is a mobile, coarse-grained sand deposit. It lies in the southern part of Race Point Channel north of Cape Cod. It occupies 8.0 km2 or 4.3 percent of the mapped area of quadrangle 3. Water depth range of the stations is 45 to 64 m and of the mapped substrate 40 to 64 m. Mean weight percents of aggregates and composite grades: mud, 1; sand, 98; (fgS, 4; cgS, 94); gravel, 1 (G1, 1; G2, <1). Multibeam topographic imagery shows the substrate surface displays large bedforms (100-200 m wavelength) in the south and small bedforms (50-100 m wavelength) in the north. The bedforms trend NW-SE, approximately normal to the trend of Race Point Channel. The small bedforms in the northern part are similar in wavelength and orientation to those present in substrate AC to the west. Substrate AM is bounded to the north by substrates Z and AP, to the east by substrate AP, to the south by substrate AO, and to the west by substrate AK. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AN r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate AN is a mobile, coarse-grained sand deposit. It lies along the northern margin of Race Point Channel and the southern margin of Stellwagen Bank. It occupies 7.3 km2 or 3.9 percent of the mapped area of quadrangle 3. Water depth range of the stations is 48 to 50 m and of the mapped substrate 45 to 50 m. Mean weight percents of aggregates and composite grades: mud, <1; sand, 99 (fgS, 32; cgS, 67); gravel, 1 (G1, 1; G2, 0). Substrate AN is similar in mobility and sand content to adjacent substrate A1 to the north and east and to substrate Z to the west, but substrate AN has a much higher fine-grained sand content (32 wt pct) compared to that of A1 (2 wt pct) and Z (5 wt pct). It is likely that the fine-grained sand in substrate AN has been winnowed and transported by storm-wave generated currents from substrate A1 on Stellwagen Bank which abuts AN to the north. Also, the surface of substrate AN displays ridge-like features in multibeam topographic imagery that are interpreted to be partly-buried iceberg keel marks (see substrates AP and AI), whereas the surfaces of substrates A1 and Z are smooth in topographic imagery. To the south, substrate AN abuts the eastern deposit of substrate AL and surrounds the western deposit of substrate AL. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AO r_cgS Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand. Substrate AO is a mobile, coarse-grained sand deposit lying along the southern margin of Race Point Channel and the northern margin of Cape Cod. It likely represents a sand apron that extends northward from Cape Cod into Race Point Channel. It occupies 5.9 km2 or 3.2 percent of the mapped area of quadrangle 3. Water depth range of the stations is 28 to 49 m and of the mapped substrate 28 to 55 m. Mean weight percents of aggregates and composite grades: mud, 1; sand, 97 (fgS, 3; cgS, 94); gravel, 2 (G1, 2; G2, 1). The surface of substrate AO is smooth as observed in multibeam topographic imagery. By contrast, it is bounded to the north by substrate AM, to the east by substrate AP, and to the west by substrate AQ, all of which are mobile sand substrates that collectively display surfaces of bedforms, ridges, troughs, and hummocks in multibeam topographic imagery. Substrate AO is similar in grain-size composition to other rippled, coarse-grained sand substates (A1, Y, Z) that display a smooth surface in multibeam topographic imagery in quadrangle 3. Two boulder ridges (substrate C) are present within the southern part of substrate AO. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AP r_cgS / i_pcbG Enumerated_Domain_Value_Definition: Rippled, coarse-grained sand; partial veneer on immobile pebble, cobble, boulder gravel. Substrate AP is a layered substrate of mobile, coarse-grained sand that partially veneers immobile pebble, cobble, boulder gravel in the southeastern part of Race Point Channel. It occupies 27.2 km2 or 14.7 percent of the mapped area of quadrangle 3. Water depth range of the stations is 34 to 51 m and of the mapped substrate 30 to 51 m. Mean weight percents of aggregates and composite grades of the sediment partial veneer overlying gravel: mud, <1; sand, 92 (fgS, 3; cgS, 89); gravel, 8 (G1, 5; G2, 3). Substrate AP exhibits relatively high reflectivity in multibeam backscatter imagery, typical of coarse sediment. Cobbles and boulders are identified based on video imagery. The substrate’s surface topography as observed in multibeam topographic imagery is a series of subparallel, arcuate troughs and ridges that trend northwestward. Both substrate layers are visible on the ridges, but only the upper layer (the rippled, coarse-grained sand) is visible in the troughs. The troughs are <5 m deep and are interpreted to be iceberg keel marks that were formed during the last deglaciation (Valentine, 2019) by the grounding of icebergs as they drifted westward into the channel from deeper water to the east. The keel marks are present beginning at 45 to 50 m water depth in the east and extend westward in the channel until the water depth deepens to >50 m. Substrate AP surrounds a boulder ridge (substrate C). Substrate AP is bounded to the north and west in Race Point Channel by substrates AO, AM, AI, and A1, all of which are rippled, coarse-grained sand. Substrate AP is bounded to the east, in the open Atlantic Ocean, by substrate A1. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AQ r_fgS Enumerated_Domain_Value_Definition: Rippled, fine-grained sand. Substrate AQ in quadrangle 3 is a mobile fine-grained sand deposit. It lies along the southern margin of Little Stellwagen Basin on the slope that separates the basin from Cape Cod to the south. It occupies 1.2 km2 or 0.6 percent of the mapped area of quadrangle 3. Water depth range of the stations is 54 to 61 m and of the mapped substrate 50 to 61 m. Mean weight percents of aggregates and composite grades: mud, 3; sand, 96 (fgS, 62; cgS, 34); gravel, 1 (G1, <1; G2, <1). The surface of substrate AQ is covered with storm-generated sand ripples. It is bounded to the north by substrates Y, AC, and AK, to the east by substrates AM and AO, and to the west by substrate AG. Substrate AQ likely extends southward into an unmapped area of shallowing water depths on the northern margin of Cape Cod. Enumerated_Domain_Value_Definition_Source: Page Valentine, U.S. Geological Survey (Valentine and Cross, 2026, https://doi.org/10.3133/sim3544) Attribute: Attribute_Label: PHOTOS Attribute_Definition: The value of this attribute indicates if seabed photographs were taken at the station. True indicates that photo(s) were taken, false indicates no photo(s) were taken. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Boolean character set. True indicates the station has seabed photo(s), false indicates no photo(s). Attribute: Attribute_Label: VIDEO Attribute_Definition: The value of this attribute indicates if seabed video was recorded at the station. True indicates that video was recorded at the location, false indicates no video was taken. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Boolean character set. True indicates the station has video imagery of the seabed, false indicates no video. Attribute: Attribute_Label: SAMPLE Attribute_Definition: The value of this attribute indicates if a sample was collected at the station. True indicates a sediment sample was taken, false indicates no sediment sample was taken. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Boolean character set. True indicates the station has a sediment sample, false indicates no sediment sample. Attribute: Attribute_Label: USGS-DBID Attribute_Definition: Woods Hole Coastal and Marine Science Center sediment database identification number for analyzed sediment samples. The unique identifier is assigned during lab analysis. Older samples consist of two characters and three numerals assigned during lab analysis. More recent samples begin with the assigned multi-letter code GS-, which corresponds to the type of analysis performed on the sample (grain size analysis), followed by a six-digit number assigned sequentially as samples are registered for analysis. The NODATA value is 9999 indicating where samples were not physically collected. Attribute_Definition_Source: U.S. Geological Survey. Attribute_Domain_Values: Unrepresentable_Domain: Character set. Attribute: Attribute_Label: LONGITUDE Attribute_Definition: Longitude coordinate of the station location. In the case of sediment samples, this is the longitude of the sediment sample. For other station locations, this location marks the approximate end of the occupied station. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -70.03538 Range_Domain_Maximum: -70.22157 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LATITUDE Attribute_Definition: Latitude coordinate of the station location. In the case of sediment samples, this is the latitude of the sediment sample. For other station locations, this location marks the approximate end of the occupied station. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 42.09603 Range_Domain_Maximum: 42.20272 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: CRUISE_ID Attribute_Definition: U.S. Geological Survey Woods Hole Coastal and Marine Science Center cruise identifier. This is a combination of vessel name codes, year, and field activity number within that year. For example: ANDR95015 indicates the vessel used was the Anderson; 95015 refers to the cruise number where the first two digits are the year and the remaining numbers indicate the field activity of that year. 95015 indicates 1995, the fifteenth field activity of that year. In this dataset, for cruises after 2000, the format changed such that the year is represented by four digits such as AUK2013044. In this instance, AUK is the vessel, 2013044 is the cruise number where 2013 is the year and 044 indicates the forty-fourth cruise of that year. The online link supplied with each field activity takes the user to additional information about the field activity and reflects the newer naming convention of YYYY-XXX-FA where YYYY is the cruise year, XXX is the field activity cruise number within that year, and FA stands for Field Activity. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ANDR95015 Enumerated_Domain_Value_Definition: vessel Anderson, 1995, field activity 15 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=1995-015-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2013044 Enumerated_Domain_Value_Definition: vessel Auk, 2013, field activity 44 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2013-044-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2014015 Enumerated_Domain_Value_Definition: vessel Auk, 2014, field activity 15 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2014-015-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2014055 Enumerated_Domain_Value_Definition: vessel Auk, 2014, field activity 55 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2014-055-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2014066 Enumerated_Domain_Value_Definition: vessel Auk, 2014, field activity 66 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2014-066-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2015017 Enumerated_Domain_Value_Definition: vessel Auk, 2015, field activity 17 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2015-017-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2015062 Enumerated_Domain_Value_Definition: vessel Auk, 2015, field activity 62 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2015-062-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2016004 Enumerated_Domain_Value_Definition: vessel Auk, 2016, field activity 4 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2016-004-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2016012 Enumerated_Domain_Value_Definition: vessel Auk, 2016, field activity 12 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2016-012FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2016038 Enumerated_Domain_Value_Definition: vessel Auk, 2016, field activity 38 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2016-038-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2016039 Enumerated_Domain_Value_Definition: vessel Auk, 2016, field activity 39 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2016-039-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2017030 Enumerated_Domain_Value_Definition: vessel Auk, 2017, field activity 30 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2017-030-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2017044 Enumerated_Domain_Value_Definition: vessel Auk, 2017, field activity 44 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2017-044-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2018027 Enumerated_Domain_Value_Definition: vessel Auk, 2018, field activity 27 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2018-027-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2018028 Enumerated_Domain_Value_Definition: vessel Auk, 2018, field activity 28 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2018-028-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2018029 Enumerated_Domain_Value_Definition: vessel Auk, 2018, field activity 29 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2018-029-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2019007 Enumerated_Domain_Value_Definition: vessel Auk, 2019, field activity 7 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2019-007-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2019008 Enumerated_Domain_Value_Definition: vessel Auk, 2019, field activity 8 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2019-008-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2020012 Enumerated_Domain_Value_Definition: vessel Auk, 2020, field activity 12 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2020-012-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AUK2021016 Enumerated_Domain_Value_Definition: vessel Auk, 2021, field activity 16 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=2021-016-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: DIAN96025 Enumerated_Domain_Value_Definition: vessel Diane G, 1996, field activity 25 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=1996-025-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: DLWR93030 Enumerated_Domain_Value_Definition: vessel Delaware II, 1993, field activity 30 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=1993-030-FA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: FERL95012 Enumerated_Domain_Value_Definition: vessel Ferrel, 1995, field activity 12 Enumerated_Domain_Value_Definition_Source: https://cmgds.marine.usgs.gov/fan_info.php?fa=1995-012-FA Attribute: Attribute_Label: DEPTH_M Attribute_Definition: Water depth of station (in meters), measured at some location by the ship fathometer and at other locations by the SEABOSS depth sensor. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 28 Range_Domain_Maximum: 126 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: YEAR_COLL Attribute_Definition: Year the station was occupied. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1993 Range_Domain_Maximum: 2021 Attribute_Units_of_Measure: year Attribute: Attribute_Label: UTC_JDTIME Attribute_Definition: Julian day and time the station was occupied. Time is GMT. The format is Julian Day:HH:MM:SS. Julian day is the integer number representing the interval of time in days since January 1 of the year of collection and time is in hours, minutes, and seconds. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set specifying day and time in the format Julian day:HH:MM:SS. Attribute: Attribute_Label: QUAD Attribute_Definition: Quadrangle number in Stellwagen Bank National Marine Sanctuary region that the station occupied. In the case of drift stations, this number represents where the quadrangle occupied at the end of the station. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: Quadrangle 3 of Stellwagen Bank National Marine Sanctuary Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: DEVICE Attribute_Definition: The sampler used to acquire the sediment sample - the USGS modified Van Veen (VV) grab sampler. A NODATA value of 9999 indicates where samples were not physically collected. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set. Attribute: Attribute_Label: T_DEPTH Attribute_Definition: Top depth of the sample below sediment-water interface. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0 Attribute_Units_of_Measure: cm Attribute: Attribute_Label: B_DEPTH Attribute_Definition: Bottom depth of the sample below the sediment-water interface. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2 Range_Domain_Maximum: 2 Attribute_Units_of_Measure: cm Attribute: Attribute_Label: WEIGHT Attribute_Definition: Weight of dry sample in grams. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 38.31 Range_Domain_Maximum: 730.62 Attribute_Units_of_Measure: grams Attribute: Attribute_Label: SAND_PCT Attribute_Definition: Sand content in percent dry weight. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7.53 Range_Domain_Maximum: 99.82 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: GRAVEL_PCT Attribute_Definition: Gravel content in percent dry weight. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 92.33 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: CLAY_PCT Attribute_Definition: Clay content in percent dry weight. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 4.55 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: SILT_PCT Attribute_Definition: Silt content in percent dry weight. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 14.35 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: MUD_PCT Attribute_Definition: Mud (combined clay and silt) content in percent dry weight. A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 17.62 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_11 Attribute_Definition: Weight percent of the sample in the 11 phi fraction (clay). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0.45 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_10 Attribute_Definition: Weight percent of the sample in the 10 phi fraction (clay). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1.56 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_9 Attribute_Definition: Weight percent of the sample in the 9 phi fraction (clay). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 2.71 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_8 Attribute_Definition: Weight percent of the sample in the 8 phi fraction (very fine silt). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 5.27 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_7 Attribute_Definition: Weight percent of the sample in the 7 phi fraction (fine silt). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 4.3 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_6 Attribute_Definition: Weight percent of the sample in the 6 phi fraction (medium silt). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 3.26 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_5 Attribute_Definition: Weight percent of the sample in the 5 phi fraction (coarse silt). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 2.21 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_4 Attribute_Definition: Weight percent of the sample in the 4 phi fraction (very fine sand). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 41.98 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_3 Attribute_Definition: Weight percent of the sample in the 3 phi fraction (fine sand). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 79.55 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: FG_SAND Attribute_Definition: Weight percent of the combined 4-phi and 3-phi weight percents (fine-grained sand). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.04 Range_Domain_Maximum: 85.9 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_2 Attribute_Definition: Weight percent of the sample in the 2 phi fraction (medium sand). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.5 Range_Domain_Maximum: 63.67 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_1 Attribute_Definition: Weight percent of the sample in the 1 phi fraction (coarse sand). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 72.99 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHI_0 Attribute_Definition: Weight percent of the sample in the 0 phi fraction (very coarse sand). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 48.56 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: CG_SAND Attribute_Definition: Weight percent of the combined 2-phi, 1-phi and 0-phi weight percents (coarse-grained sand). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.5 Range_Domain_Maximum: 98.41 Attribute: Attribute_Label: PHIM1 Attribute_Definition: Weight percent of the sample in the -1 phi fraction (granule). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 15.7 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHIM2 Attribute_Definition: Weight percent of the sample in the -2 phi fraction (pebble). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 14.9 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: G1 Attribute_Definition: Weight percent of the combined -1-phi and -2-phi weight percents (gravel subclass 1). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 24.49 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHIM3 Attribute_Definition: Weight percent of the sample in the -3 phi fraction (pebble). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 42.35 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHIM4 Attribute_Definition: Weight percent of the sample in the -4 phi fraction (pebble). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 46.56 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PHIM5 Attribute_Definition: Weight percent of the sample in the -5 phi fraction (pebble). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary (Poppe and others, 2014) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 37.88 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: G2 Attribute_Definition: Weight percent of the combined -3-phi, -4-phi and -5-phi weight percents (gravel subclass 2). A value of 9999 is a NODATA value entered where samples were not physically collected. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 92.18 Attribute: Attribute_Label: RIPPLES Attribute_Definition: The value of this attribute indicates if ripples were observed at the station in video. True indicates that ripples are present, false indicates no ripples were present. A value of 9999 is a NODATA value where there was no video on which to base the observation. There is an instance where the video attribute is FALSE, and RIPPLES is TRUE due to ripples observed in the real-time unrecorded video and noted in the log book of the field activity. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set. Attribute: Attribute_Label: SUBSTR_NAM Attribute_Definition: Truncated from SUBSTR_NAME in the CSV and XLSX files. Brief text description corresponding to the interpreted geologic substrate of the seabed that is present at the station location. Not all stations represent a mappable substrate, so the geologic unit of the station may not be the same as the comprehensive geologic substrate unit assigned to an area. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set. Attribute: Attribute_Label: STA_POLYLO Attribute_Definition: Truncated from STA_POLYLOC in the CSV and XLSX files. The mapped polygon substrate (SUBSTR_SYM) the station location falls within prefixed by "plg" indicating polygon. If the geologic unit of the station is not part of a coherent mappable substrate, the polygon location indicates the mapped substrate (SUBSTR_SYM) the sample falls within, with the additional information indicating representation by a square symbol (Map D, sheet 1 in Valentine and Cross, 2026) since the station itself is not part of the mapped coherent substrate in which it falls. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set. Attribute: Attribute_Label: STA_CLUST Attribute_Definition: The related Scientific Investigations Map, Map D sheet 1 (Valentine and Cross, 2026) does not label extremely closely spaced station locations. These stations are identified on the map in 'cluster' boxes. This attribute identifies those station locations and which box they fall within on Map D, sheet 1. Station falling within a cluster have the number assigned to that cluster box on the companion map. Blanks in the field indicate the station does not fall within a cluster box. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Numeric values represented as text. Attribute: Attribute_Label: COMMENT Attribute_Definition: Provides additional pertinent information regarding the station. This information can include why a sample was not used in the interpretation or pertinent information regarding the station location. Attribute_Definition_Source: Page Valentine, U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set. Overview_Description: Entity_and_Attribute_Overview: In the substrate attribute, weight percents described in the domain value definitions may not add to 100 due to rounding of values. Also in the substrate attributes, the mean weight percents for the units, sand is divided into two composite grades: fine-grained sand (fgS; 0.062 to <0.25 mm) and coarse-grained sand (cgS; 0.25 to <2mm). Gravel is also divided into two composite grades: Gravel1 (G1; 2 to <8 mm) and Gravel2(G2; 8 to <64 mm). > In the CSV file, the column headings are not truncated. The truncation is a function of converting to a shapefile with a 10-character attribute header limit. In addition to the shapefile and CSV file, there is an accompanying Excel spreadsheet (q3_stations_geology.xlsx). Additional information regarding abbreviations is in the first row of the spreadsheet. > That following information is the second row of the spreadsheet, the more robust header information. This is presented as column: column heading: description. > Column A: USGS SBNMS Stations: Station number for samples collected during this project in the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts > Column B: Geologic substrate symbol: Symbol of substrate shown on maps > Column C: Substrate name: Combination of substrate unit symbol and abbreviation of substrate descriptive name (see column AV) > Column D: Photos: Collected (TRUE) or did not collect (FALSE) seabed photographs at the station > Column E: Video: Collected (TRUE) or did not collect (FALSE) video imagery at the station > Column F: Sample: Collected (TRUE) or did not collect (FALSE) sediment sample at the station > Column G: USGS-DBID: USGS sediment grain size analysis database identification; n.d., no data > Column H: Longitude west, decimal degrees: Longitude west in decimal degrees > Column I: Latitude north, decimal degrees: Latitude north in decimal degrees > Column J: WHCMSC field activity (cruise) no.: USGS Woods Hole Coastal and Marine Science Center field activity (cruise) number. Example ANDR95036. ANDR is vessel name code (Peter W. Anderson), 95 is last two digits of year, and 036 is the 36th field activity of the year. > Column K: Sample collection water depth, m: Water depth at which sample was taken, in meters > Column L: Sample collection year: Year sediment sample was collected > Column M: Sample collection date, DDD:HH:MM:SS GMT: Date expressed as Julian Day (DDD) and time as HOUR:MINUTES:SECONDS Greenwich Mean Time (GMT) at which sample was collected (GMT same as UTC, Universal Coordinated Time, and ZULU, military time) > Column N: Quad: Quadrangle number in SBNMS region in which sample was collected > Column O: Sampler used: Sediment sample collected by a USGS modified Van Veen (VV) grab sampler http://woodshole.er.usgs.gov/operations/sfmapping/seaboss.htm > Column P: Sediment sample top, cm below seabed surface: Top of sediment sample is the seabed surface (0 centimeters) > Column Q: Sediment sample bottom, cm below seabed surface: Bottom of sediment sample is 2 centimeters below the seabed surface > Column R: Dry sediment sample mass, g: Mass of dry sediment used for grain-size analysis in grams > Column S: Sand, wt pct: Weight percent of sand in sample > Column T: Gravel, wt pct: Weight percent of gravel in sample > Column U: Clay, wt pct: Weight percent of clay in sample > Column V: Silt, wt pct: Weight percent of silt in sample > Column W:Mud (clay+silt), wt pct: Weight percent of mud (combined clay and silt) in sample > Column X: 11-phi-size class (clay), wt pct: Weight percent of 11-phi-size sediment in sample > Column Y: 10-phi-size class (clay), wt pct: Weight percent of 10-phi-size sediment in sample > Column Z: 9-phi-size class (clay), wt pct: Weight percent of 9-phi-size sediment in sample > Column AA: 8-phi-size class (very fine silt), wt pct: Weight percent of 8-phi-size sediment in sample > Column AB: 7-phi-size class (fine silt), wt pct: Weight percent of 7-phi-size sediment in sample > Column AC: 6-phi-size class (medium silt), wt pct: Weight percent of 6-phi-size sediment in sample > Column AD: 5-phi-size class (coarse silt), wt pct: Weight percent of 5-phi-size sediment in sample > Column AE: 4-phi-size class (very fine sand), wt pct: Weight percent of 4-phi-size sediment in sample > Column AF: 3-phi-size class (fine sand), wt percent: Weight percent of 3-phi-size sediment in sample > Column AG: fine-grained sand (fgS) (4 + 3 phi), wt pct: Weight percent of combined 3-phi- and 4-phi-size sediment in sample > Column AH: 2-phi-size class (medium sand), wt pct: Weight percentage of 2-phi-size sediment in sample > Column AI: 1-phi-size class (coarse sand), wt pct: Weight percent of 1-phi-size sediment in sample > Column AJ: 0-phi-size class (very coarse sand), wt pct: Weight percent of 0-phi-size sediment in sample > Column AK: Coarse-grained sand (cgS) (2 + 1 + 0 phi), wt pct: Weight percent of combined 2-phi-, 1-phi-, and 0-phi-size sediment in sample > Column AL: -1-phi-size class (granule), wt pct: Weight percent of -1-phi-size sediment in sample > Column AM: -2-phi-size class (pebble), wt pct: weight percent of -2-phi-size sediment in sample > Column AN: Gravel 1 (G1) (-1 + -2 phi), wt pct: G subscript 1 weight percent of combined -1-phi- and -2-phi-size sediment in sample > Column AO: -3-phi-size class (pebble), wt pct: Weight percent of -3-phi-size sediment in sample > Column AP: -4-phi-size class (pebble), wt pct: Weight percent of -4-phi-size sediment in sample > Column AQ: -5-phi-size class (pebble), wt pct: Weight percent of -5-phi-size sediment in sample > Column AR: Gravel2 (G2) (-3 + -4 + -5 phi), wt pct: G subscript 2 weight percent of combined -3-phi-, -4-phi-, and -5-phi-size sediment in sample > Column AS: Sand ripples present: Indicates if sand ripples were observed in video at the station location > Column AT: Substrate unit name translation: Describes the mobility, texture, and layering of the sediment substrate > Column AU: Polygon locations of sample stations used to map substrates. Polygon locations of samples that cannot be mapped as a coherent substrate and are represented by a square symbol on Map D sheet 1 in Valentine and Cross, 2026: Indicates if identified substrate at the sample location can be mapped as a substrate and what substrate the sample falls within, or cannot be mapped as a coherent substrate indicating in what substrate polygon the sample falls followed by a symbol representation as a square. > Column AV: Stations located in cluster no.: Identifies the cluster box on Map D sheet 1 (Valentine and Cross, 2026) that the station falls within. Blank values indicate the station does not fall within a cluster box. > Column AW: Comment: Explanatory notes for selected stations. The definitions of the substrate components (found in the SUBSTRATE attribute) are fully defined in the related report (Valentine and Cross, 2026) but are also defined here: i = immobile cgS = coarse-grained sand fgS = fine-grained sand fgcgS = fine- and coarse-grained sand dominated by coarse-grained cgfgS = coarse-and fine-grained sand dominated by fine-grained If the S is capitalized, it indicates Sand as a major component. A lower-case s indicates sandy, and not a major component. m = muddy r = rippled p = pebble c = cobble (when not immediately followed by g which indicates coarse-grained) b = boulder G = gravel (as a major component) g = gravelly / = overlying or partial veneer over Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: Mailing Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: The dataset contains quad3_stations_geology.shp and the shapefile components, the data in Excel 365 spreadsheet format (q3_stations_geology.xlsx), the data in CSV format (q3_stations_geology.csv), a browse graphic (q3_stations_geology_browse.png), and FGDC CSDGM metadata in XML format. Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Shapefile Format_Version_Number: ArcGIS 10.8.2 Format_Information_Content: The dataset contains the shapefile, Excel spreadsheet and CSV file as well as the browse graphic and associated CSDGM metadata. Transfer_Size: 0.6 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/65d7c9e6d34ec3e1801d814f Network_Resource_Name: https://www.sciencebase.gov/catalog/item/65d7c9e6d34ec3e1801d814f Network_Resource_Name: https://doi.org/10.5066/P13PVHRI Access_Instructions: The first link downloads all data available from the page as a zip file, the second link is to the page containing the data, and the third link is to the data release main landing page. Digital_Form: Digital_Transfer_Information: Format_Name: XLSX Format_Version_Number: Excel 365 Format_Information_Content: The dataset contains the shapefile, Excel spreadsheet and CSV file as well as the browse graphic and associated CSDGM metadata. Transfer_Size: 0.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/65d7c9e6d34ec3e1801d814f Network_Resource_Name: https://www.sciencebase.gov/catalog/item/65d7c9e6d34ec3e1801d814f Network_Resource_Name: https://doi.org/10.5066/P13PVHRI Access_Instructions: The first link downloads all data available from the page as a zip file, the second link is to the page containing the data, and the third link is to the data release main landing page. Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: Excel 365 Format_Information_Content: The dataset contains the shapefile, Excel spreadsheet and CSV file as well as the browse graphic and associated CSDGM metadata. Transfer_Size: 0.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/65d7c9e6d34ec3e1801d814f Network_Resource_Name: https://www.sciencebase.gov/catalog/item/65d7c9e6d34ec3e1801d814f Network_Resource_Name: https://doi.org/10.5066/P13PVHRI Access_Instructions: The first link downloads all data available from the page as a zip file, the second link is to the page containing the data, and the third link is to the data release main landing page. Fees: None. Technical_Prerequisites: These data are available in Environmental Systems Research Institute (Esri) shapefile format and Microsoft Excel 365 format. The user must software capable of reading these formats. The data are available for download in WinZip format. Metadata_Reference_Information: Metadata_Date: 20260402 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-457-2251 Contact_Facsimile_Telephone: 508-548-8700 x2251 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with the USGS. Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998