Location and analyses of sediment samples collected on Stellwagen Bank off Boston, Massachusetts from November 5, 2013 to April 30, 2019 during U.S. Geological Survey field activities

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Page C. Valentine
Publication_Date: 20191226
Title:
Location and analyses of sediment samples collected on Stellwagen Bank off Boston, Massachusetts from November 5, 2013 to April 30, 2019 during 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/P9FWFLPD
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Valentine, P.C., and Cross, V.A., 2019, 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: U.S. Geological Survey data release, https://doi.org/10.5066/P9FWFLPD.
Online_Linkage: https://doi.org/10.5066/P9FWFLPD
Online_Linkage:
Description:
Abstract:
These data are part of the effort to map geologic substrates of the Stellwagen Bank National Marine Sanctuary (SBNMS) 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 data were collected in collaboration with the Stellwagen Bank National Marine Sanctuary and will aid research on the ecology of fish and invertebrate species that inhabit the region. Sediment samples were collected aboard the Sanctuary's research vessel, R/V Auk at 679 locations on and near Stellwagen Bank using a customized Van Veen grab sampler integrated into the USGS SEABed Observation and Sampling System (SEABOSS). The SEABOSS, equipped with a video camera, was deployed from the Auk and allowed to drift for a shore period of time approximately 1 meter from the sea floor collecting video imagery of the sea floor. The SEABOSS drift typically culminated in the collection of a sediment sample used for grain-size analysis. Biological specimens were collected from the sediment, if present, and retained by scientists at teh SBNMS in Scituate, Massachusetts.
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:
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20131105
Ending_Date: 20190430
Currentness_Reference:
ground condition of when data were collected. Sediment data were collected on 20 cruises from November 5, 2013 to April 30, 2019.
Status:
Progress: complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.457940
East_Bounding_Coordinate: -70.134620
North_Bounding_Coordinate: 42.421960
South_Bounding_Coordinate: 42.084520
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5d95153ee4b0c4f70d10a4f7
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
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: 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/
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). There are 4 exceptions to this where the original FIELD_NO had to be replaced because the original value had been occupied on a previous cruise. The following FIELD_NO's reflect this: 4200 changed to 4415; 4202 changed to 4417; 4205 changed to 4419; 4207 changed to 4420.
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%.
Completeness_Report:
These data represent all the sediment samples collected as part of the 20 field activities that occurred from November 2013 to April 2019. 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. Additionally, if the station was a plankton tow, sediment samples were not acquired. A total of 679 sediment samples were collected and analyzed for grain size composition from the associated field activities.
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) at two second intervals with a horizontal accuracy of 10 m. The navigation antenna is located 5.3 m forward of the SEABOSS deployment location. This offset was not accounted for in the navigation acquisition (navigation fixes represent antenna location).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Water depth was determined using a Simrad ES60, 120 kHz, single beam echo sounder using a 120-25 transducer, which detects the seabed to a depth of 800 m. Depth values were rounded to the nearest meter to account for ship motion.
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 2013 to 2019 with the process date representing the most recent data collection.
Process_Date: 2019
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. Coarse fraction (particles greater than 63 microns in diamter) determined by sieve; fine fraction (particles less than 63 microns in diameter) determined by Beckman Coulter Multisizer. See Poppe and others (2014) for analytical specifics for grain size analysis. Sediment statistics were recorded in Microsoft Excel file and returned to the scientist. This process was followed for each field activity sample analysis. For these data, those analysis dates ranged from 2013 to 2019.
A note from the lab was included with one of the returned datasets that has additional information with regards to some of the samples. The ID's are referring to the ANALYSIS_ID.
The following samples had percent differences in the weight of the coarse fractions that were outside acceptable parameters during original sieving and processing:
GS-000387
GS-000391
GS-000402
GS-000403
GS-000404
GS-000405
GS-000408
GS-000410
The coarse fractions from original analysis were resieved and reweighed. New weights were within acceptable percent differences of the calculated coarse fraction weight, and these were used to calculate grain size distribution for the above samples.
The following samples were discarded before being run through the 30 micron aperture tube in the multisizer:
GS-000423
GS-000424
GS-000425
For these samples, the fine fraction is reported simply as the weight/percent of total sample below 63 microns.
The process date refers to the latest processing date.
Process_Date: 2019
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:
Some of the sample locations (latitude and longitude) were modified to more accurate locations by correcting the values based on the ship navigation file correlated to sample time. Additionally, four station FIELD_NO values were corrected because those station number had already been assigned to stations occupied on cruises prior to this series of cruises aboard the R/V Auk. What follows are the original station numbers and the modified values that occur in this dataset:
4200 to 4415
4202 to 4417
4205 to 4419
4207 to 4420	
The process date refers to the latest processing date.
Process_Date: 2019
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 information provided by the sediment laboratory varied slightly during the time period these data represent.
The first column of information for the older records was DB_ID. That column heading was changed to ANALYSIS_ID, along with the format of the ID value, which starts with GS. For this dataset, that first column is set to ANALYSIS_ID.
Up until 2016, the last 4 columns of information are ANALYST, ANAL_COMM, LITHOLOGY, and COMMENTS. After that time, the final 4 columns are ANALYST, QUALITY GRADE-ANALYST, LITHOLOGY, COMMENTS. And a new final column is included in the spreadsheets QUALITY GRADING GUIDELINES. This final column is not a per sample piece of information, but rather a column to describe the information in the QUALITY GRADE-ANALYST column. In order to maintain consistency with older datasets, both the ANAL_COMM and QUALITY GRADE-ANALYST fields are included. Sometimes the ANAL_COMM field was used to document the amount (in grams) of shell material removed from the sediment sample.
In some cases, the ANAL_COMM field contained information pertaining to the quality grade. For consistency, that information was moved to the QUALITY_GRADE column. This edit applied to the following records: ANALYSIS_ID's GS-001059 to GS-001095, GS-001098 to GS-001147, GS-001786 to GS-001827, GS-002287 to GS-002324, GS-002683 to GS-002699, and GS-002738 to GS-002773.
The records with ANALYSIS_ID's GS-001786 to GS-001827 the information in COMMENTS about the quality grad was moved to AQ_QC_COMMENTS.
The records with ANALYSIS_ID's GS-002287 to GS-002324 did not have the day of collection in the dataset. This information was added based on the cruise log book.
Once the individual field activity spreadsheets were modified to all include the same columns of information, the individual spreadsheets were then combined into a single Microsoft Excel spreadsheet in Excel 365. This process step and subsequent process steps were performed by the same person - VeeAnn Cross.
Process_Date: 2019
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: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
Once the individual datasets were combined into a single spreadsheet the following edits were made:
The format and justification of columns was set to be consistent as well as changing the font to Arial 10.
The LATITUDE and LONGITUDE values were formatted to have 5 decimal places.
The following changes were made to provide consistency for query and display:
Convert all contact values to PVALENTINE (some were already set to that, others were P VALENTINE).
Change all project values to STELLWAGEN BANK (some were Stellwagen Bank)
Change all area values to STELLWAGEN BANK (some were Stellwagen Bank).
Process_Date: 2019
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: 2019
Process_Step:
Process_Description:
Using Esri ArcGIS 10.6.1, 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 of the features were exported using the layer's source data for the coordinate system. The output shapefile was set to stellwagen_2013_2019_sedsamps.shp.
Process_Date: 2019
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200807
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: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
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: Point
Point_and_Vector_Object_Count: 679
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_2013_2019_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, QUALITY_GR instead of QUALITY_GRADE, and QA_QC_COMM instead of QA_QC_COMMENTS), and the software generated FID and shape, defined in the entity and attribute overview section. 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_ID
Attribute_Definition:
Unique identification number generated in the sediment laboratory of the USGS's Woods Hole Coastal and Marine Science Center. The format of this identifier has changed over time.
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 cruise on which sample 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: 42.08452
Range_Domain_Maximum: 42.42196
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: -70.45794
Range_Domain_Maximum: -70.13462
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: 20
Range_Domain_Maximum: 66
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_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MINI SEABOSS
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_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Van Veen
Enumerated_Domain_Value_Definition: sample collected with a 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: 1
Range_Domain_Maximum: 12
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: 1
Range_Domain_Maximum: 30
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: 2013
Range_Domain_Maximum: 2019
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: 1
Range_Domain_Maximum: 12
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: 1
Range_Domain_Maximum: 31
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: 2013
Range_Domain_Maximum: 2019
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: 37.57
Range_Domain_Maximum: 265.71
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: 70.4
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: 18.94
Range_Domain_Maximum: 100.02
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: -0.12
Range_Domain_Maximum: 65.48
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: -0.02
Range_Domain_Maximum: 24.87
Attribute_Units_of_Measure: weight percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: CLASSIFICATION
Attribute_Definition:
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: -2.29
Range_Domain_Maximum: 6.83
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: -1.53
Range_Domain_Maximum: 6.08
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: 0.25
Range_Domain_Maximum: 2.89
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: -1.07
Range_Domain_Maximum: 2.96
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: -14.2
Range_Domain_Maximum: 104.61
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: 17.18
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: 13.56
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: 70.12
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: 49.99
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: 0.02
Range_Domain_Maximum: 73.06
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: 0.05
Range_Domain_Maximum: 75.85
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: 0.72
Range_Domain_Maximum: 87.01
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: 0.06
Range_Domain_Maximum: 84.54
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: 40.64
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: -0.06
Range_Domain_Maximum: 36.45
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: -0.02
Range_Domain_Maximum: 14.99
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: -0.03
Range_Domain_Maximum: 21.2
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: -0.1
Range_Domain_Maximum: 23.66
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: -0.01
Range_Domain_Maximum: 17.33
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: -0.01
Range_Domain_Maximum: 7.53
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: -0.01
Range_Domain_Maximum: 1.25
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: AP
Enumerated_Domain_Value_Definition: Allison Paquette
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: ARP
Enumerated_Domain_Value_Definition: Allison R. Paquette
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: BJB
Enumerated_Domain_Value_Definition: Brian J. Buczkowski
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: KMCMULLEN
Enumerated_Domain_Value_Definition: Kate McMullen
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: ANAL_COMMENTS
Attribute_Definition:
Comments can include information on sample collection, lithology, amount of shell present, and quality grade explanation. This field is not always used, so will have blanks.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
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, amount of shell present, and quality grade explanation. This field is not always used, so will have blanks.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: QUALITY_GRADE
Attribute_Definition:
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 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 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. Not all samples have a quality grade and are represented by blanks.
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: BB
Enumerated_Domain_Value_Definition: Brian Buczkowski
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_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade analyst: JC
Enumerated_Domain_Value_Definition: Jason Chaytor
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: QA_QC_COMMENTS
Attribute_Definition:
Text field describing the reason a particular quality grade was assigned. Typically for those samples that do not have a quality grade of A.
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 ANAL_COMM values and how the quality grade is assigned. That column of information is omitted from the CSV and shapefile. The shapefile truncates attribute lablels to 10 characters, so the finall attribute is presented as AQ_QC_COMM in the shapefile. 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_2013_2019_sedsamps.xlsx), a CSV file (stellwagen_2013_2019_sedsamps.csv), and a shapefile (stellwagen_2013_2019_sedsamps.shp and additional files that make up a shapefile). In addition to the sediment analysis files, the dataset contains the browse graphic (stellwagen_2013_2019_sedsamps_browse.jpg) and FGDC CSDGM metadata in XML formats.
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: XLSX
Format_Version_Number: Microsoft Excel 365
Format_Information_Content:
The ZIP file 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: Access_Instructions:
The first link is to download the data in a ZIP file. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation of the publication.
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: exported from Microsoft Excel 365
Format_Information_Content:
The ZIP file 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: Access_Instructions:
The first link is to download the data in a ZIP file. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation of the publication.
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Version_Number: Esri ArcGIS 10.6.1
Format_Information_Content:
The ZIP file 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: Access_Instructions:
The first link is to download the data in a ZIP file. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation 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.
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is to the Web Mapping Service (WMS) of the dataset. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation 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.
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is to the Web Feature Service (WFS) of the dataset. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation of the publication.
Fees: none
Technical_Prerequisites:
The ZIP file contains data in XLSX, CSV, and Esri shapefile formats. The user must have software capable of uncompressing the ZIP file and reading the data formats.
Metadata_Reference_Information:
Metadata_Date: 20200807
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: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
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_P9FWFLPD/stellwagen_2013_2019_sedsamps.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:19:01 2021