Location and analyses of sediment samples collected on Stellwagen Bank off Boston, Massachusetts from September 2020 to August 2021 during three U.S. Geological Survey field activities

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Page C. Valentine
Publication_Date: 20230321
Title:
Location and analyses of sediment samples collected on Stellwagen Bank off Boston, Massachusetts from September 2020 to August 2021 during three U.S. Geological Survey field activities
Edition: 1.0
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9G7QARQ
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/P9G7QARQ
Online_Linkage: https://sciencebase.gov/catalog/item/633c99a1d34e900e86cf1ab7
Larger_Work_Citation:
Citation_Information:
Originator: Page C. Valentine
Originator: VeeAnn A. Cross
Publication_Date: 2023
Title:
Sea-floor Sediment Samples, Seabed and Sample Imagery, and CTD Instrument Data Collected on Stellwagen Bank from September 2020 to August 2021
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9G7QARQ
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Valentine, P.C., and Cross, V.A., 2023, Sea-floor sediment samples, seabed and sample imagery, and CTD instrument data collected on Stellwagen Bank from September 2020 to August 2021: U.S. Geological Survey data release, https://doi.org/10.5066/P9G7QARQ .
Online_Linkage: https://doi.org/10.5066/P9G7QARQ
Online_Linkage: https://sciencebase.gov/catalog/item/633c8e2dd34e900e86cf1a93
Description:
Abstract:
These data are a part of the effort to map geologic substrates of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts. The overall goal is to develop high-resolution (1:25,000) interpretive maps, based on multibeam sonar data and seabed sampling, showing surficial geology and seabed sediment dynamics. The work was conducted in collaboration with the Stellwagen Bank National Marine Sanctuary, and the data collected will aid research on the ecology of fish and invertebrate species that inhabit the region. The Sanctuary's research vessel, R/V Auk, visited a total of 169 locations on Stellwagen Bank during three separate surveys from September 2020 to August 2021. During these surveys a customized Van Veen grab sampler (SEABOSS) equipped with a video camera and a CTD was deployed in drift mode to collect sediment for grain-size analysis, video imagery of the seabed, and measurements of water column properties including temperature, salinity, density, and fluorescence.
Purpose:
These sediment samples, analyzed for grain-size composition, are a primary dataset used to describe the surficial geological substrates present in the study area.
Supplemental_Information:
Additional information regarding the field activities associated with these data can be obtained from the following locations https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-012-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-016-FA, and https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-017-FA .
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20200924
Ending_Date: 20210804
Currentness_Reference:
Ground condition of when data were collected. These data were collected during three separate surveys, with the following ranges of dates for each survey: field activity 2020-012-FA: 20200924 to 20200925; field activity 2021-016-FA: 20210721 to 20210723; and field activity 2021-017-FA: 20210802 to 20210804.
Status:
Progress: complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.56265
East_Bounding_Coordinate: -70.11801
North_Bounding_Coordinate: 42.43998
South_Bounding_Coordinate: 42.09603
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
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_Keyword: Stellwagen Bank National Marine Sanctuary
Theme_Keyword: SBNMS
Theme_Keyword: sea floor samples
Theme_Keyword: sediment samples
Theme_Keyword: ground-truth
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme_Keyword: location
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: field monitoring stations
Theme_Keyword: sea-floor characteristics
Theme_Keyword: marine geology
Theme_Keyword: grain-size analysis
Theme_Keyword: grab sampling
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: grab sampling
Theme_Keyword: sediment analysis
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:633c99a1d34e900e86cf1ab7
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Massachusetts
Place_Keyword: Atlantic Ocean
Place_Keyword: Stellwagen Bank
Place_Keyword: Stellwagen Bank National Marine Sanctuary
Place_Keyword: SBNMS
Place_Keyword: Massachusetts Bay
Access_Constraints: None.
Use_Constraints: Not to be used for navigation.
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
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
Browse_Graphic:
Browse_Graphic_File_Name:
https://www.sciencebase.gov/catalog/file/get/633c99a1d34e900e86cf1ab7?name=stellwagen_2020_2021_sedsamps_browse.jpg&allowOpen=true
Browse_Graphic_File_Description:
Browse graphic of the sediment sample locations collected on Stellwagen Bank.
Browse_Graphic_File_Type: JPEG
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
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
Online_Linkage: https://doi.org/10.3133/fs14200
Online_Linkage: https://pubs.usgs.gov/fs/fs142-00/
Cross_Reference:
Citation_Information:
Originator: L.J. Poppe
Originator: K.Y. McMullen
Originator: S.J. Williams
Originator: V.F. Paskevich
Publication_Date: 2014
Title:
USGS 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
Online_Linkage: https://doi.org/10.3133/ofr20051001
Online_Linkage: https://pubs.usgs.gov/of/2005/1001/
Cross_Reference:
Citation_Information:
Originator: P.C. Valentine
Originator: V.A. Cross
Publication_Date: 2019
Title:
Location and analyses of sediment samples collected on Stellwagen Bank off Boston, Massachusetts from November 5, 2013 to April 30, 2019 on U.S. Geological Survey field activities
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9FWFLPD
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
This publication includes the grain-size analyses of the sediment samples collected on 20 other field activities.
Online_Linkage: https://doi.org/10.5066/P9FWFLPD
Online_Linkage:
https://www.sciencebase.gov/catalog/item/5d95153ee4b0c4f70d10a4f7
Data_Quality_Information:
Logical_Consistency_Report:
This dataset is based on the original sediment analyses files returned to the scientist after processing at the Woods Hole Coastal and Marine Science Center sediment lab. Over the years, some of the columns of information have varied, but not the sediment analyses columns. All of the field activities used the same research vessel, the R/V Auk. For the most part, the values of the attribute field titled FIELD_NO are in a sequential order (minus stations where samples were not acquired).
Negative weight percents (if present) in phi size distributions and gravel-sand-silt percentages may be the result of a lack of fines present in the actual samples. The statistical spreadsheet used to calculate grain size distribution takes measured weights for the coarse fractions (after wet sieving through a 4 phi sieve) and merges it with the cumulative frequency data obtained from the Multisizer for any fine fraction that remains after wet sieving. These equations include determining the percentage of the sample in fine fraction phi weight percents (5 phi to 11 phi). This fine fraction weight is determined by subtracting the wet sieved portion of the sample from the calculated total weight of the sample (determined after calculating and removing the weight of the water in the sample and weight of salt). If there is any excess mass, no matter how small, determined to be in the coarse fraction weights and not in the corrected weight if the entire sample, the calculations subtract this excess weight from the fines phi distribution to make the sum of the weight percents equal 100%.
Completeness_Report:
These data represent all the sediment samples collected as part of the three field activities that occurred from September 2020 to August 2021. However, a sample was not acquired at every station visited during the survey. Samples were discarded at sea if the sediment composition was visibly altered during collection, for example, if the sampler did not close properly causing sediment to be lost during recovery of the sample. A total of 137 sediment samples were collected and analyzed for grain size composition from the associated field activities.
2020-012-FA: Sediment samples were successfully collected at 29 of the 33 stations visited.
2021-016-FA: Sediment samples were successfully collected at 37 of the 43 stations visited.
2021-017-FA: Sediment samples were successfully collected at 72 of the 93 stations visited. However, one sample (5081) was destroyed in the lab during grain-size analysis resulting in grain-size results for a total of 71 sediment samples.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The location information for stations was acquired from a satellite navigation receiver (Furuno Satellite Compass SC-30, GPS receiver) in geographic coordinates (World Geodetic System of 1984 [WGS 84]) with a horizontal accuracy of 10 m. Cruise 2020-012-FA acquired navigation at two-second intervals on September 24 and five-second intervals on September 25. Cruise 2021-016-FA acquired navigation at a two-second interval. Cruise 2021-017-FA acquired navigation at a two-second interval. The navigation antenna was located 5.3 m forward of the SEABOSS deployment location. This offset was not accounted for in the navigation acquisition, so navigation fixes represent the antenna location. The SEABOSS may also drift away from the survey vessel when deployed to the sea floor.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Water depth relative to the local sea surface was determined using a Simrad ES60, 120 kHz, single beam echosounder using a dual frequency 120-25 kHz transducer, which detects the seabed to a depth of 800 m. Depth values were rounded to the nearest meter to account for ship motion. The water depths were transcribed manually, so some errors could be associated with that process. The depth is relative to the transducer location, no adjustment was made for tides or transducer depth.
Lineage:
Process_Step:
Process_Description:
Sediment sampling methods:
As a part of the process of mapping the sea floor, the USGS developed the SEABed Observation and Sampling System (SEABOSS) to collect samples and video and photographic images of the seabed to aid in the interpretation of seabed sonar imagery. A modified Van Veen sediment grab sampler is mounted in the center of the SEABOSS frame, which ensures the sampler is properly oriented on the seabed when a sample is collected. Before deployment, the sampler bucket's jaws are opened by collapsing the extended arms to a near-horizontal position and locking them in place with two catches. The sampler operates passively to sample the seabed; it is not spring loaded.
To collect a sediment sample, the SEABOSS frame was lowered gently onto the seabed, reducing tension on the cable, which caused the two locking catches to be automatically released by gravity. As the cable was retrieved, the grab sampler's arms were pulled upward, closing the bucket around the sediment, and the SEABOSS was lifted off the seabed.
The SEABOSS was retrieved and set upon a wooden platform that kept the sampler bucket and camera systems above the deck. The sampler's arms were held in the upright position manually or by tension on the cable, the two doors on the upper side of the bucket were opened, and the sediment surface was photographed before the sediment was removed. For this project, the upper 2 cm of sediment, representing the surface of the seabed, were removed with a rectangular shovel 2-cm deep and stored in a plastic bag for grain-size analysis. The remaining sediment was dumped into a tray on the deck below the sampler and inspected for biological specimens that were collected for use in studies conducted by scientists at the SBNMS and at collaborating academic institutions. Subsequently the sediment was discarded, after which the sampler was washed in preparation for sampling at the next site. Further information on the SEABOSS can be found in Valentine and others (2000). The samples were collected over a time period from 2020 to 2021 with the process date representing the most recent data collection.
Process_Date: 2021
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:
Samples were analyzed in the sediment laboratory at the USGS Woods Hole Coastal and Marine Science Center. Samples submitted to the sediment analysis laboratory for grain size analysis using the Beckman Coulter Multisizer3 and sieving of the ≥ 4 phi fraction are assigned unique analysis identifiers (ANALYSIS_ID), and a macro-enabled Microsoft Excel data entry spreadsheet (GrainSizeWorksheet_xxxx.xlsm, where xxxx is the batch number assigned to the sample submission) is created to record the measurement data. About 50 grams of wet sediment are placed in a pre-weighed beaker, weighed, oven dried at 100 degrees Celsius (degC), and reweighed to correct for salt. The dried sample is wet sieved through a 0.062 mm (No. 230) sieve. The coarse fraction remaining in the sieve is oven dried at 100 degC (until completely dried) and weighed. The fine fraction in water is collected in a plastic Nalgene bottle and sealed with a screw lid (stored for no longer than one week). The coarse fraction is dry sieved to determine the individual weights of the 4 to -5 phi fractions, and the weights are recorded in the data entry spreadsheet. At the request of the submitter, shell and shell fragments can be manually removed from the -2 phi and coarser fractions, weighed and their weights are recorded in the data entry spreadsheet. The fine fraction is run and combined using the 200 μm and 30 μm Coulter analyses using the Multisizer3 software to get the fine fraction grain size distribution. The fine fraction distribution data are added to the data entry spreadsheet. The spreadsheet is used to calculate a continuous phi class distribution from the original fractions. For these data, those analysis dates ranged from 2021 to 2022.
The process date refers to the latest processing date.
Process_Date: 2022
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Brian J. Buczkowski
Contact_Position: Physical Scientist
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 x2361
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: bbuczkowski@usgs.gov
Process_Step:
Process_Description:
Continuous phi class distribution from the original fractions are transposed to the "results" tab in the macro-enabled Microsoft Excel data entry workbook (GrainSizeWorksheet_xxxx.xlsm, where xxxx is the identifier assigned to the sample submission). Macros in the workbook ("GS_statistics" and "sedimentname") are run to calculate grain size classification and statistical analyses and finish processing the data. Sample, navigation, and field identifiers, along with continuous phi class distribution data, grain size classification, and statistical analysis results are copied and pasted into a final Microsoft Excel spreadsheet (xxxx_GS-MS_results.xlsx, where xxxx is the batch number assigned to the sample submission). The processed data are quality control checked and assigned a quality grade based on the examination of the analytical data. Processed data are released to the submitter and incorporated into the laboratory's database. All raw analytical data generated by the samples are archived in the sediment analysis laboratory. For these data, those analysis dates ranged from 2021 to 2022.
The process date refers to the latest processing date.
Process_Date: 2022
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Brian J. Buczkowski
Contact_Position: Physical Scientist
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 x2361
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: bbuczkowski@usgs.gov
Process_Step:
Process_Description:
The three separate field activities were combined into a single spreadsheet using Excel 365.
Process_Date: 2022
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: 02556-1598
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 Excel spreadsheet was exported as a CSV UTF-8 file using Excel 365, omitting the last column of information (QUALITY GRADING GUIDELINES) which is not individual station information.
Process_Date: 2022
Process_Step:
Process_Description:
Using Esri ArcGIS 10.8.1, the CSV file was converted to a shapefile within Esri ArcMap using File - Add Data - Add XY data. The CSV file was selected, with the x-coordinate set to LONGITUDE and the y-coordinate set to LATITUDE. The coordinate system of the input coordinates was set to the geographic coordinate system GCS_WGS_1984. Once the event theme was added to ArcMap, the data were then converted to a shapefile by right-clicking on the event theme - Data - Export Data. All the features were exported using the layer's source data for the coordinate system. The output shapefile was set to stellwagen_2020_2021_sedsamps.shp.
Process_Date: 2022
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 137
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_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
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: stellwagen_2020_2021_sedsamps.xlsx
Entity_Type_Definition:
Sediment sample location and analyses in Excel spreadsheet format. The attributes defined refer to the Excel spreadsheet column headings, and are also in the header row of the CSV file. The shapefile has these attributes (except ANALYSIS_I instead of ANALYSIS_ID, CLASSIFICA instead of CLASSIFICATION, and QUALITY_GR instead of QUALITY_GRADE), and the software generated FID and shape, defined in the entity and attribute overview section. These last two shapefile specific attributes are not visible in all GIS software packages. The last Excel spreadsheet column is omitted from the CSV and shapefile and is described in the entity and attribute overview section.
Entity_Type_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: ANALYSIS_I
Attribute_Definition:
Truncated from the spreadsheet ANALYSIS_ID. An identifier for the sample which is unique to the database. This identifier begins 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.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: FIELD_NO
Attribute_Definition:
Sample name or number as assigned in the field by the Chief Scientist.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: PROJECT
Attribute_Definition:
Name of project or project number under which samples were taken or data generated; sometimes project name indicates a more specific area.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: CRUISE_ID
Attribute_Definition:
Name or number of the cruise on which the sample was collected. The cruise identifier is in the format YYYY-XXX-FA where YYYY is the survey year, XXX is the survey number of that year, and FA indicates field activity.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: CONTACT
Attribute_Definition:
Name of Principal Investigator or Chief Scientist responsible for data collection (usually first initial and last name) when available.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: AREA
Attribute_Definition:
General geographic area of data collection. Name is general enough to easily locate area on a state map.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition:
Latitude coordinate, in decimal-degrees, of sample location. South latitude recorded as negative values. The value is supplied to the lab by the person submitting the sample, so may vary in number of decimal places.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 42.09603
Range_Domain_Maximum: 42.43998
Attribute_Units_of_Measure: Decimal degrees
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition:
Longitude coordinate, in decimal degrees, of sample location. West longitude is recorded as negative values. The value is supplied to the lab by the person submitting the sample, so may vary in number of decimal places.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.56265
Range_Domain_Maximum: -70.11801
Attribute_Units_of_Measure: Decimal degrees
Attribute:
Attribute_Label: DEPTH_M
Attribute_Definition:
Measured depth, in meters, of water overlying sediment sample. The value is supplied to the lab by the person submitting the sample, so may vary in number of decimal places.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 23
Range_Domain_Maximum: 67
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: T_DEPTH
Attribute_Definition:
Top depth of sample, in centimeters, below the sediment-water interface.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0
Attribute_Units_of_Measure: centimeters
Attribute:
Attribute_Label: B_DEPTH
Attribute_Definition:
Bottom depth of sample, in centimeters, below the sediment-water interface.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2
Range_Domain_Maximum: 2
Attribute_Units_of_Measure: centimeters
Attribute:
Attribute_Label: DEVICE
Attribute_Definition: Device used to collect the sample.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mini Seaboss w/ 0.1 sq m Van Veen grab
Enumerated_Domain_Value_Definition:
sample collected with the SEABOSS system that uses the 0.1 square meter Van Veen grab.
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: MONTH_COLL
Attribute_Definition: Calendar month sample collected.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7
Range_Domain_Maximum: 9
Attribute:
Attribute_Label: DAY_COLL
Attribute_Definition: Calendar day sample collected.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2
Range_Domain_Maximum: 25
Attribute:
Attribute_Label: YEAR_COLL
Attribute_Definition: Calendar year sample collected.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2020
Range_Domain_Maximum: 2021
Attribute:
Attribute_Label: MONTH_ANAL
Attribute_Definition: Calendar month sample completed analysis.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 5
Range_Domain_Maximum: 8
Attribute:
Attribute_Label: DAY_ANAL
Attribute_Definition: Calendar day sample completed analysis.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 18
Range_Domain_Maximum: 27
Attribute:
Attribute_Label: YEAR_ANAL
Attribute_Definition: Calendar year sample completed analysis.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2021
Range_Domain_Maximum: 2022
Attribute:
Attribute_Label: WEIGHT
Attribute_Definition: Weight of dry sample in grams.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 44.35
Range_Domain_Maximum: 136.91
Attribute_Units_of_Measure: grams
Attribute:
Attribute_Label: GRAVEL_PCT
Attribute_Definition:
Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1 phi and larger).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 72.24
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: SAND_PCT
Attribute_Definition:
Sand content in percent dry weight of the sample (particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm; 0 phi through 4 phi).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 25.41
Range_Domain_Maximum: 99.82
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: SILT_PCT
Attribute_Definition:
Silt content in percent dry weight of the sample (particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; 5 phi through 8 phi, inclusive).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.03
Range_Domain_Maximum: 14.35
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: CLAY_PCT
Attribute_Definition:
Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; less than 8 phi).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 4.51
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: CLASSIFICA
Attribute_Definition:
Truncated from CLASSIFICATION. Sediment description based on rigorous definition usually Shepard (1954) as modified by Schlee and Webster (1967), Schlee (1973), and Poppe and others (2014). These values represent all the possible values as defined in the USGS East Coast Sediment Texture Database data dictionary, and do not necessarily reflect the values present in this dataset.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: GRAVEL
Enumerated_Domain_Value_Definition: gravel equal to or greater than 50 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: GRAVELLY SEDIMENT
Enumerated_Domain_Value_Definition:
gravel equal to or greater than 10 percent, but less than 50 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SAND
Enumerated_Domain_Value_Definition: sand equal to or greater than 75 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SILTY SAND
Enumerated_Domain_Value_Definition:
sand less than 75 percent and equal to or greater than 50 percent, silt greater than clay, and clay less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CLAYEY SAND
Enumerated_Domain_Value_Definition:
sand less than 75 percent and equal to or greater than 50 percent, clay greater than silt, and silt less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SILT
Enumerated_Domain_Value_Definition: silt equal to or greater than 75 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SANDY SILT
Enumerated_Domain_Value_Definition:
silt less than 75 percent and equal to or greater than 50 percent, sand greater than clay, and clay less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CLAYEY SILT
Enumerated_Domain_Value_Definition:
silt less than 75 percent and equal to or greater than 50 percent, clay greater than sand, and sand less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CLAY
Enumerated_Domain_Value_Definition: clay equal to or greater than 75 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SANDY CLAY
Enumerated_Domain_Value_Definition:
clay less than 75 percent and equal to or greater than 50 percent, sand greater than silt, and silt less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SILTY CLAY
Enumerated_Domain_Value_Definition:
clay less than 75 percent and equal to or greater than 50 percent, silt greater than sand, and sand less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SAND SILT CLAY
Enumerated_Domain_Value_Definition: clay, sand, and silt greater than 20 percent each
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute:
Attribute_Label: MEDIAN
Attribute_Definition: Middle point in the grain size distribution in phi units.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -4.06
Range_Domain_Maximum: 2.51
Attribute_Units_of_Measure: phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: MEAN
Attribute_Definition: Average value in the grain size distribution in phi units.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -2.59
Range_Domain_Maximum: 2.53
Attribute_Units_of_Measure: phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: STDEV
Attribute_Definition:
Standard deviation (root mean square of the deviations) of the grain size distribution in phi units.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.55
Range_Domain_Maximum: 3.45
Attribute_Units_of_Measure: phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: SKEWNESS
Attribute_Definition:
Skewness (deviation from symmetrical form) of the grain size distribution.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.81
Range_Domain_Maximum: 3.54
Attribute_Units_of_Measure: unitless
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: KURTOSIS
Attribute_Definition:
Kurtosis (degree of curvature near the mode) of the grain size distribution.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.74
Range_Domain_Maximum: 86.57
Attribute_Units_of_Measure: unitless
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: MODE1CLASS
Attribute_Definition:
First mode (particle size that occurs the most number of times) in phi units. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE1FREQ
Attribute_Definition:
Modal strength of the first mode in percent. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE2CLASS
Attribute_Definition:
Second mode in phi units. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE2FREQ
Attribute_Definition:
Modal strength of the second mode in percent. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE3CLASS
Attribute_Definition:
Third mode in phi units. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE3FREQ
Attribute_Definition:
Modal strength of the third mode in percent. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: NMODES
Attribute_Definition:
Number of modes. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: PHIM5
Attribute_Definition:
Weight percent of the sample in the -5 phi fraction and coarser (nominal diameter of particles greater than or equal to 32 mm); very coarse pebbles to cobbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM4
Attribute_Definition:
Weight percent of the sample in the -4 phi fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 53.45
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM3
Attribute_Definition:
Weight percent of the sample in the -3 phi fraction (nominal diameter of particles greater than or equal to 8 mm, but less than 16 mm); medium pebbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 42.35
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM2
Attribute_Definition:
Weight percent of the sample in the -2 phi fraction (nominal diameter of particles greater than or equal to 4 mm, but less than 8 mm); fine pebbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 27.07
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM1
Attribute_Definition:
Weight percent of the sample in the -1 phi fraction (nominal diameter of particles greater than or equal to 2 mm, but less than 4 mm); very fine pebbles (granules).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 44.61
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_0
Attribute_Definition:
Weight percent of the sample in the 0 phi fraction (nominal diameter of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 78.76
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_1
Attribute_Definition:
Weight percent of the sample in the 1 phi fraction (nominal diameter of particles greater than or equal to 0.5 mm, but less than 1 mm); coarse sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.16
Range_Domain_Maximum: 65.55
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_2
Attribute_Definition:
Weight percent of the sample in the 2 phi fraction (nominal diameter of particles greater than or equal to 0.25 mm, but less than 0.5 mm); medium sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.67
Range_Domain_Maximum: 80.98
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_3
Attribute_Definition:
Weight percent of the sample in the 3 phi fraction (nominal diameter of particles greater than or equal to 0.125 mm, but less than 0.25 mm); fine sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.08
Range_Domain_Maximum: 63.62
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_4
Attribute_Definition:
Weight percent of the sample in the 4 phi fraction (nominal diameter of particles greater than or equal to 0.0625 mm, but less than 0.125 mm); very fine sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 18.44
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_5
Attribute_Definition:
Weight percent of the sample in the 5 phi fraction (nominal diameter of particles greater than or equal to 0.031 mm, but less than 0.0625 mm); coarse silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 2.35
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_6
Attribute_Definition:
Weight percent of the sample in the 6 phi fraction (nominal diameter of particles greater than or equal to 0.016 mm, but less than 0.031 mm); medium silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 3.26
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_7
Attribute_Definition:
Weight percent of the sample in the 7 phi fraction (nominal diameter of particles greater than or equal to 0.00 8mm, but less than 0.016 mm); fine silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 4.3
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_8
Attribute_Definition:
Weight percent of the sample in the 8 phi fraction (nominal diameter of particles greater than or equal to 0.004 mm, but less than 0.008 mm); very fine silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 5.27
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_9
Attribute_Definition:
Weight percent of the sample in the 9 phi fraction (nominal diameter of particles greater than or equal to 0.002 mm, but less than 0.004 mm); coarse clay.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 2.71
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_10
Attribute_Definition:
Weight percent of the sample in the 10 phi fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 1.6
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_11
Attribute_Definition:
Weight percent of the sample in the 11 phi fraction and finer (nominal diameter of particles less than 0.001 mm; fine clay.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.53
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: ANALYST
Attribute_Definition:
Person who performed the grain size or physical properties analysis. Typically represented by the person's initials, or first initial last name.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MPP
Enumerated_Domain_Value_Definition: Marcie Purkey Philips
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SAG/AAB
Enumerated_Domain_Value_Definition: Simone Gibson/Allyson Boggess
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: QUALITY_GR
Attribute_Definition:
Truncated from QUALITY GRADE-ANALYST. Quality grades for sample data are assigned based on the calculated percent difference between the weights of the coarse fraction remaining after wet sieving and the sum of all the weighed fractions after dry sieving the coarse fraction, indicating an estimated differing amount of material which could skew the calculated grain size results. A quality grade is assigned as well as the initials of the person that assigned the grading in the format Q-XX where Q is the quality grade and XX are the initials of the person assigning the grade. The values of quality grade reflect all possibilities, not necessarily what occurs in this dataset.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade: A
Enumerated_Domain_Value_Definition: A = percent differences between 0% and +- 1.5%
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade: B
Enumerated_Domain_Value_Definition: B = percent differences between ±1.5% and ±3%
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade: C
Enumerated_Domain_Value_Definition: C = percent differences between ±3% and ±4.5%
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade: D
Enumerated_Domain_Value_Definition: D = percent differences greater than ±4.5%
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade analyst: BJB
Enumerated_Domain_Value_Definition: Brian J. Buczkowski
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: LITHOLOGY
Attribute_Definition:
General lithologic description of sample. This field is not always filled in, so will have blanks.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: COMMENTS
Attribute_Definition:
Comments can include information on sample collection, lithology, or amount of shell present. This field is not always used in the lab analysis, but is present in all of these samples and represents the amount of shells -2 phi and larger.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Overview_Description:
Entity_and_Attribute_Overview:
These attribute definitions describe each column of information in the Excel spreadsheet with the exception of additional information in the last column of the Excel spreadsheet. That column contains an explanation of the quality grading values and how the quality grade is assigned. That column of information is omitted from the CSV and shapefile. The shapefile truncates attribute labels to 10 characters when compared to the Excel spreadsheet and the CSV file. The first row of the spreadsheet is the column heading. The CSV file has the same information and the column definitions are the same - with the last column of the XLSX file omitted (data quality grade explanation). The information in the last column of the XLSX is as follows:
Data quality grades may be determined by several factors, and any comments or notes that indicate the data for a particular sample may be suspect are included in the results table for that sample under "comments". Quality grades for sample data that do not have any additional comments are assigned based on the calculated percent difference between the weights of the coarse fraction remaining after wet sieving and the sum of all of the weighed fractions after dry sieving the coarse fraction, indicating an estimated differing amount of material which could skew the calculated grain size results.
A = percent differences between 0% and ±1.5%
B = percent differences between ±1.5% and ±3%
C = percent differences between ±3% and ±4.5%
D = percent differences greater than ±4.5%
Negative weight percents in phi size distributions and gravel-sand-silt percentages may be the result of a lack of fines present in the actual samples. The statistical spreadsheet used to calculate grain size distribution takes measured weights for the coarse fractions (after wet sieving through a 4 phi sieve) and merges it with the cumulative frequency data obtained from the Multisizer for any fine fraction that remains after wet sieving. These equations include determining the percentage of the sample in fine fraction phi weight percents (5 phi to 11 phi). This fine fraction weight is determined by subtracting the wet sieved portion of the sample from the calculated total weight of the sample (determined after calculating and removing the weight of the water in the sample and weight of salt). If there is any excess mass, no matter how small, determined to be in the coarse fraction weights and not in the corrected weight if the entire sample, the calculations subtract this excess weight from the fines phi distribution to make the sum of the weight percents equal 100%.
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 and physical address
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
The dataset contains the sediment sample analysis data in three formats - an Excel file (stellwagen_2020_2021_sedsamps.xlsx), a CSV file (stellwagen_2020_2021_sedsamps.csv), and a shapefile (stellwagen_2020_2021_sedsamps.shp and additional files that make up a shapefile). In addition to the sediment analysis files, the dataset contains the browse graphic (stellwagen_2020_2021_sedsamps_browse.jpg) 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: XLSX
Format_Version_Number: Microsoft Excel 365
Format_Information_Content:
The dataset contains the sediment sample analysis in XLSX, CSV and shapefile formats, along with the FGDC CSDGM metadata.
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/633c99a1d34e900e86cf1ab7
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/633c99a1d34e900e86cf1ab7
Network_Resource_Name: https://doi.org/10.5066/P9G7QARQ
Access_Instructions:
The first link is to download all the data in a ZIP file. The second link is to the landing page of the data where individual files can be downloaded. The third link is to the main landing page of the publication.
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: exported from Microsoft Excel 365
Format_Information_Content:
The dataset contains the sediment sample analysis in XLSX, CSV and shapefile formats, along with the FGDC CSDGM metadata.
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/633c99a1d34e900e86cf1ab7
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/633c99a1d34e900e86cf1ab7
Network_Resource_Name: https://doi.org/10.5066/P9G7QARQ
Access_Instructions:
The first link is to download all the data in a ZIP file. The second link is to the landing page of the data where individual files can be downloaded. The third link is to the main landing page of the publication.
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Version_Number: Esri ArcGIS 10.8.1
Format_Information_Content:
The dataset contains the sediment sample analysis in XLSX, CSV and shapefile formats, along with the FGDC CSDGM metadata.
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/633c99a1d34e900e86cf1ab7
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/633c99a1d34e900e86cf1ab7
Network_Resource_Name: https://doi.org/10.5066/P9G7QARQ
Access_Instructions:
The first link is to download all the data in a ZIP file. The second link is to the landing page of the data where individual files can be downloaded. The third link is to the main landing page of the publication.
Digital_Form:
Digital_Transfer_Information:
Format_Name: WMS
Format_Version_Number: 1.3.0
Format_Information_Content: Web mapping service of the dataset.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalogMaps/mapping/ows/633c99a1d34e900e86cf1ab7?service=wms&request=getcapabilities&version=1.3.0
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/633c99a1d34e900e86cf1ab7
Network_Resource_Name: https://doi.org/10.5066/P9G7QARQ
Access_Instructions:
The first link is to the Web Mapping Service (WMS) of the dataset. The second link is to the landing page of the data where individual files can be downloaded. The third link is to the main landing page of the publication.
Digital_Form:
Digital_Transfer_Information:
Format_Name: WFS
Format_Version_Number: 1.0.0
Format_Information_Content: Web feature service of the dataset.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalogMaps/mapping/ows/633c99a1d34e900e86cf1ab7?service=wms&request=getcapabilities&version=1.3.0
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/633c99a1d34e900e86cf1ab7
Network_Resource_Name: https://doi.org/10.5066/P9G7QARQ
Access_Instructions:
The first link is to the Web Feature Service (WFS) of the dataset. The second link is to the landing page of the data where individual files can be downloaded. The third link is to the main landing page of the publication.
Fees: none
Technical_Prerequisites:
The dataset contains data in XLSX, CSV, and Esri shapefile formats. The user must have software capable of uncompressing the zip file as a result of downloading the full dataset. Additionally, the user must have software capable of reading the data formats.
Metadata_Reference_Information:
Metadata_Date: 20230321
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
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02556-1598
Contact_Voice_Telephone: 508-548-8700 x2251
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.
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9G7QARQ/stellwagen_2020_2021_sedsamps_meta.html>
Generated by mp version 2.9.51 on Tue Mar 21 11:09:10 2023