Locations and analysis of sediment samples collected in the Duxbury to Hull Massachusetts survey area (DH_SedimentSamples shapefile, Geographic, WGS84)

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Frequently anticipated questions:

What does this data set describe?
Who produced the data set?
Why was the data set created?
How was the data set created?
How reliable are the data; what problems remain in the data set?
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Who wrote the metadata?

What does this data set describe?

Title:

Locations and analysis of sediment samples collected in the Duxbury to Hull Massachusetts survey area (DH_SedimentSamples shapefile, Geographic, WGS84)

Abstract:

These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Science Center (WHSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters (5-30 m deep) of Massachusetts between the New Hampshire border and Cape Cod Bay. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html). This spatial dataset is from the study area located between Duxbury and Hull Massachusetts, and consists of high-resolution geophysics (bathymetry, backscatter intensity, and seismic reflection) and ground validation (sediment samples, video tracklines and bottom photographs). The data were collected during four separate surveys conducted between 2003 and 2007 (NOAA survey H10993 in 2003, USGS-WHSC survey 06012 in 2006, and USGS-WHSC surveys 07001 and 07003 in 2007) and cover more than 200 square kilometers of the inner continental shelf.

How might this data set be cited?
U.S. Geological Survey, 2010, Locations and analysis of sediment samples collected in the Duxbury to Hull Massachusetts survey area (DH_SedimentSamples shapefile, Geographic, WGS84): Open-File Report 2009-1072, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts.
Online Links:
This is part of the following larger work.
Barnhardt, Walter A., Ackerman, Seth D., Andrews, Brian D., and Baldwin, Wayne E., 2010, Geophysical and Sampling Data from the Inner Continental Shelf: Duxbury to Hull, Massachusetts.: Open-File Report 2009-1072, U.S. Geological Survey, Reston, VA.
Online Links:
- http://pubs.usgs.gov/of/2009/1072/
What geographic area does the data set cover?
West_Bounding_Coordinate: -70.810074
East_Bounding_Coordinate: -70.606740
North_Bounding_Coordinate: 42.325839
South_Bounding_Coordinate: 42.106931
What does it look like?

http://pubs.usgs.gov/of/2009/1072/GIS/browse_jpg/big/DH_SedimentSamples.jpg (JPEG)
Thumbnail image of sediment sample locations
Does the data set describe conditions during a particular time period?

Beginning_Date: 07-Sep-2007

Ending_Date: 11-Sep-2007

Currentness_Reference:

ground condition
What is the general form of this data set?
Geospatial_Data_Presentation_Form: vector digital data
How does the data set represent geographic features?
1. How are geographic features stored in the data set?
  This is a Vector data set. It contains the following vector data types (SDTS terminology):
  - Entity point (28)
2. What coordinate system is used to represent geographic features?
  Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
  The ellipsoid used is WGS_1984.
  The semi-major axis of the ellipsoid used is 6378137.000000.
  The flattening of the ellipsoid used is 1/298.257224.

How does the data set describe geographic features?

DH_SedimentSamples

Point location of sediment samples (Source: USGS)

FID

Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.

Shape

Feature geometry. (Source: ESRI) Coordinates defining the features.

GROUP

Internal Value - Sediment Lab Grouping (Source: USGS)

Range of values
Minimum:	3
Maximum:	3

DB_ID

Unique identifier consisting of two characters and three numerics assigned during lab analysis (Source: Scientist) Character string of width 254

FIELD_NO

Sample name assigned in the field (Source: Scientist) Character string of width 254

PROJECT

Project under which the samples were taken (COASTAL MASS = Coastal Massachusetts) (Source: Scientist) Character string of width 254

CRUISE_ID

Name or number of cruise during which the samples were collected (Source: Scientist) Character string of width 254

CONTACT

Name (initial and last name) of the principal investigator and/or survey data curator (Source: Scientist) Character string of width 254

AREA

General geographic where the samples were taken (Source: Scientist) Character string of width 254

LATITUDE

Latitude coordinate of sample location (decimal degrees, WGS84) (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	42.106931
Maximum:	42.325839
Units:	Decimal degrees
Resolution:	0.000001

LONGITUDE

Longitude coordinate of sample location (decimal degrees, WGS84) (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	-70.810074
Maximum:	-70.60674
Units:	Decimal degrees
Resolution:	0.000001

DEPTH_M

Depth or sounding in meters, extracted from the final bathymetry grid from the Duxbury to Hull survey area (depth for sample 145 was determined by the adjacent bathymetry grid wmb_bathy6m - see processing steps for more information). (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	9.9
Maximum:	33.8
Units:	meters

T_DEPTH

Top depth of the sample below sediment-water interface in centimeters (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0
Maximum:	0
Units:	centimeters

B_DEPTH

Bottom depth of the sample below sediment-water interface in centimeters (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	2
Maximum:	2
Units:	centimeters

DEVICE

Device used to collect sample (Source: USGS East Coast Sediment Texture Database data dictionary) VAN VEEN GRAB

MONTH_COLL

Calendar month sample collected based on time in UTC. (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	9
Maximum:	9

DAY_COLL

Calendar day sample collected based on time in UTC. (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	8
Maximum:	10

YEAR_COLL

Calendar year sample collected based on time in UTC. (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	7
Maximum:	7

MONTH_ANAL

Calendar month sample analyzed. (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	11
Maximum:	11

DAY_ANAL

Calendar day sample analyzed. (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	1
Maximum:	8

YEAR_ANAL

Calendar year sample analyzed. (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	7
Maximum:	7

WEIGHT

Weight of dry sample in grams (Source: Sediment Laboratory Analyst)

Range of values
Minimum:	11.1211
Maximum:	207.04
Units:	grams
Resolution:	0.0001

GRAVEL_PCT

Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1phi and larger) (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0
Maximum:	65.21
Units:	percent
Resolution:	0.01

SAND_PCT

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 ; 0phi through 4phi ) (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	1.79
Maximum:	99.51
Units:	percent
Resolution:	0.01

SILT_PCT

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; 5phi through 8phi, inclusive) (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.09
Maximum:	63.24
Units:	percent
Resolution:	0.01

CLAY_PCT

Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9phi and smaller) (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.06
Maximum:	44.98
Units:	percent
Resolution:	0.01

CLASSIFICA

Sediment description based on a rigorous definition (Shepard, 1954) (Source: USGS East Coast Sediment Texture Database data dictionary - USGS OFR 2005-1001)

Value	Definition
GRAVEL	Sediment whose main phase (usually >50%) is >2 mm
GRAVELLY SEDIMENT	Sediment whose main phase (usually >50%) is >2 mm, but with significant sand)
SAND	Sediment whose main phase is <2 mm, but >0.062 mm
SILTY SAND	Sediment whose main phase is sand (usually >50%), but with significant silt
SAND SILT CLAY	Sediment with sand, silt, and clay concentrations all <20%)
SANDY SILT	Sediment whose main phase is silt (usually >50%), but with significant sand
CLAYEY SILT	Sediment whose main phase is silt (usually >50%), but with significant clay

MEDIAN

Middle point in the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	-1.82
Maximum:	7.84
Units:	phi
Resolution:	0.01

MEAN

Average value in the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	-1.68
Maximum:	7.83
Units:	phi
Resolution:	0.01

STDEV

Standard Deviation of the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.52
Maximum:	4.19
Units:	phi
Resolution:	0.01

SKEWNESS

Deviation from symmetrical form of the grain-size distribution (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	-0.43
Maximum:	3.63
Resolution:	0.01

KURTOSIS

Degree of curvature near the mode of the grain-size distribution (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	-1.25
Maximum:	73.47
Resolution:	0.01

MODE1CLASS

First mode (particle size that occurs the most number of times) in phi units (Source: U.S. Geological Survey) null value

MODE1FREQ

Modal strength of the first mode in percent. (Source: U.S. Geological Survey) null value

MODE2CLASS

Second mode in phi units. (Source: U.S. Geological Survey) null value

MODE2FREQ

Modal strength of the second mode in percent. (Source: U.S. Geological Survey) null value

MODE3CLASS

Third mode in phi units. (Source: U.S. Geological Survey) null value

MODE3FREQ

Modal strength of the third mode in percent. (Source: U.S. Geological Survey) null value

NMODES

Number of modes (Source: U.S. Geological Survey) null value

PHIM5

Weight percent of the sample in the -5 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0
Maximum:	0
Units:	percent
Resolution:	0.01

PHIM4

Weight percent of the sample in the -4 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0
Maximum:	14.7
Units:	percent
Resolution:	0.01

PHIM3

Weight percent of the sample in the -3 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0
Maximum:	25.79
Units:	percent
Resolution:	0.01

PHIM2

Weight percent of the sample in the -2 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0
Maximum:	20.98
Units:	percent
Resolution:	0.01

PHIM1

Weight percent of the sample in the -1 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0
Maximum:	39.73
Units:	percent
Resolution:	0.01

PHI_0

Weight percent of the sample in the 0 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.01
Maximum:	21.44
Units:	percent
Resolution:	0.01

PHI_1

Weight percent of the sample in the 1 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.08
Maximum:	29.61
Units:	percent
Resolution:	0.01

PHI_2

Weight percent of the sample in the 2 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.28
Maximum:	60.43
Units:	percent
Resolution:	0.01

PHI_3

Weight percent of the sample in the 3 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.48
Maximum:	79.06
Units:	percent
Resolution:	0.01

PHI_4

Weight percent of the sample in the 4 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.09
Maximum:	47.03
Units:	percent
Resolution:	0.01

PHI_5

Weight percent of the sample in the 5 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.01
Maximum:	12.01
Units:	percent
Resolution:	0.01

PHI_6

Weight percent of the sample in the 6 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.02
Maximum:	21.36
Units:	percent
Resolution:	0.01

PHI_7

Weight percent of the sample in the 7 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.03
Maximum:	22.10
Units:	percent
Resolution:	0.01

PHI_8

Weight percent of the sample in the 8 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.03
Maximum:	30.58
Units:	percent
Resolution:	0.01

PHI_9

Weight percent of the sample in the 9 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.03
Maximum:	25.27
Units:	percent
Resolution:	0.01

PHI_10

Weight percent of the sample in the 10 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.02
Maximum:	14.07
Units:	percent
Resolution:	0.01

PHI_11

Weight percent of the sample in the 11 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)

Range of values
Minimum:	0.01
Maximum:	5.64
Units:	percent
Resolution:	0.01

ANALYST

Name(usually first initial and last name) of person who performed the grain size or physical properties analysis (Source: USGS East Coast Sediment Texture Database data dictionary) Character string of width 254

ANAL_COMM

Any further information about sediment analysis for all or specific parameters in this table (Source: USGS East Coast Sediment Texture Database data dictionary) Character string of width 254

LITHOLOGY

General lithologic description of sample (Source: USGS East Coast Sediment Texture Database data dictionary) Character string of width 254

COMMENTS

IComments on sample collection or lithology (Source: USGS East Coast Sediment Texture Database data dictionary) Character string of width 254

Entity_and_Attribute_Overview:

The Attribute Definition Source for most of these attributes is the USGS East Coast Sediment Texture Database data dictionary which can be found in USGS Open File Report 2005-1001 (http://pubs.usgs.gov/of/2005/1001/)

Entity_and_Attribute_Detail_Citation:

USGS Open File Report 2005-1001 (http://pubs.usgs.gov/of/2005/1001/)

Who produced the data set?

Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- U.S. Geological Survey
Who also contributed to the data set?
To whom should users address questions about the data?

Seth Ackerman

U.S. Geological Survey

Geologist

384 Woods Hole Rd.
Woods Hole, MA

USA

508-548-8700 x2315 (voice)

508-457-2310 (FAX)

sackerman@usgs.gov

Why was the data set created?

This data set includes the locations, identifiers, grain-size data and(or) textural descriptions of surficial sediments collected at 28 stations. The sediments were collected with a modified Van Veen grab (large SEABed Observation and Sampling System (SEABOSS)) during USGS survey 07003, conducted September 7-11, 2007 aboard the R/V Connecticut offshore Massachusetts in the Duxbury to Hull survey area. This data set was collected to ground-truth (verify) the acoustic data sets that were acquired during NOAA hydrographic survey H10993 (2003) and USGS geophysical surveys 06012 (2006) and 07001 (2007). Samples were analyzed in the sediment laboratory at the USGS Woods Hole Science Center.

How was the data set created?

From what previous works were the data drawn?

Information unavailable from original metadata. (source 1 of 1)

Information unavailable from original metadata., unknown, Information unavailable from original metadata..

Other_Citation_Details:
The source information was incomplete and had to be modified to meet the standard. Only the source time period of content was supplied.

Type_of_Source_Media: Information unavailable from original metadata.
Source_Contribution: Information unavailable from original metadata.
How were the data generated, processed, and modified?
Date: Sep-2007 (process 1 of 9)
One hundred twenty-eight samples were collected aboard the R/V Connecticut (USGS survey 07003) with a Van Veen grab sampler (Blackwood and Parolski, 2001) that was also equipped with a digital-still and video camera. Forty-nine additional stations were occupied and "sampled" with the photographs and video where sediment samples could not be collected. Those stations are not represented in this dataset; see the SEABOSS Trackline shapefile in this report (USGS OFR 2009-1072) for the locations of those data. Person who carried out this activity:

Science party of survey 07003

U.S. Geological Survey

Geologists

384 Woods Hole Road
Woods Hole, MA

USA

(508) 548-8700 x2315 (voice)

(508) 457-2310 (FAX)

sackerman@usgs.gov

Data sources produced in this process:
- bagged sediment samples
Date: Nov-2007 (process 2 of 9)
Samples were analyzed in the sediment laboratory at the USGS Woods Hole Science Center. Coarse fraction determined by sieve; fine fraction determined by Coulter Counter. See Poppe, Williams, and Paskevich (2005) for analytical specifics. MS Excel file (XLS) saved as Comma Separated Value file (CSV). Person who carried out this activity:

Larry Poppe

U.S. Geological Survey

Geologist

384 Woods Hole Road
Woods Hole, MA

USA

(508) 548-8700 x2314 (voice)

(508) 457-2310 (FAX)

lpoppe@usgs.gov

Data sources used in this process:
- bagged sediment samples
Data sources produced in this process:
- wb1.xls
- wb1.csv
Date: 06-Feb-2009 (process 3 of 9)
In ArcCatalog (version 9.3), the ASCII comma-delimited file (wb1.csv) was converted to a point feature class by right-clicking on the comma separated value text file -- Create Feature Class -- from XY table using the defined projection Geographic (Decimal_Degrees_WGS84.prj). {output file: 07003_SedAnalysis_Feb6.shp] Person who carried out this activity:

Seth Ackerman

U.S. Geological Survey

Geologist

384 Woods Hole Rd.
Woods Hole, MA

USA

508-548-8700 x2315 (voice)

508-457-2310 (FAX)

sackerman@usgs.gov

Data sources used in this process:
- wb1.csv
Data sources produced in this process:
- 07003_SedAnalysis_Feb6.shp
- 07003_SedAnalysis_Feb6.prj
Date: 06-Feb-2009 (process 4 of 9)
In ArcMap (version 9.3), the twenty-eight sediment sample locations from within the Duxbury to Hull survey area were selected from the shapefile of one hundred twenty-eight sediment sample locations that were collected during USGS field activity 07003. The selected sample locations representing the data from the Duxbury to Hull project were exported to a new ESRI point shapefile. Then XTools Pro (version 5.3.0) for ArcGIS desktop was used to export the table to Microsoft Excel, where the table was saved as an ASCII comma-delimited file (csv) [output files: DH_SedimentSamples.shp, DH_SedimentSamples.csv] Person who carried out this activity:

Seth Ackerman

U.S. Geological Survey

Geologist

384 Woods Hole Rd.
Woods Hole, MA

USA

508-548-8700 x2315 (voice)

508-457-2310 (FAX)

sackerman@usgs.gov

Data sources used in this process:
- 07003_SedAnalysis_Feb6.shp
Data sources produced in this process:
- DH_SedimentSamples.shp
- DH_SedimentSamples.prj
- DH_SedimentSamples.csv
Date: 20-Aug-2009 (process 5 of 9)
In ArcMap (version 9.3), new depths were extracted from the final bathymetry grid (DH_bathy5m) using the tool VACExtras (v2.1) - Extract Depth. A single station (sample number 145) was collected beyond the bounds of the Duxbury to Hull survey area but within the adjacent Western Massachusetts Bay multibeam-echosounder survey (http://pubs.usgs.gov/ds/99/) therefore the depth of this sample was determined from the grid "wmb_bathy6m" using the identify tool in ArcMap and manually editing the attribute table. The Extract Depth tool created a temporary column in the attribute table called "depth_temp" and the ArcMap field calculator was used to convert the negative elevation value to a positive depth value, replacing the existing values in the field "DEPTH_M." The ASCII comma-delimited file (csv) created in the previous step was manually edited using a Microsoft Excel and saved as a CSV file with the same filename [output files: DH_SedimentSamples.shp, DH_SedimentSamples.csv] Person who carried out this activity:

Seth Ackerman

U.S. Geological Survey

Geologist

384 Woods Hole Rd.
Woods Hole, MA

USA

508-548-8700 x2315 (voice)

508-457-2310 (FAX)

sackerman@usgs.gov

Data sources used in this process:
- DH_SedimentSamples.shp
- DH_SedimentSamples.csv
Data sources produced in this process:
- DH_SedimentSamples.shp
- DH_SedimentSamples.csv
Date: 12-Nov-2015 (process 6 of 9)
Edits to the metadata were made to fix any errors that MP v 2.9.30 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. The source information was incomplete and had to be modified to meet the standard. Only the source time period of content was supplied. Other minor edits were probably performed (title, publisher, publication place, etc.). The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:

U.S. Geological Survey

Attn: VeeAnn A. Cross

Marine Geologist

384 Woods Hole Rd.
Woods Hole, MA

508-548-8700 x2251 (voice)

508-457-2310 (FAX)

vatnipp@usgs.gov

Date: 20-Jul-2018 (process 7 of 9)
USGS Thesaurus keywords added to the keyword section. Person who carried out this activity:

U.S. Geological Survey

Attn: VeeAnn A. Cross

Marine Geologist

384 Woods Hole Road
Woods Hole, MA

508-548-8700 x2251 (voice)

508-457-2310 (FAX)

vatnipp@usgs.gov

Date: 18-Nov-2019 (process 8 of 9)
Crossref DOI link was added as the first link in the metadata. Person who carried out this activity:

U.S. Geological Survey

Attn: VeeAnn A. Cross

Marine Geologist

384 Woods Hole Road
Woods Hole, MA

508-548-8700 x2251 (voice)

508-457-2310 (FAX)

vatnipp@usgs.gov

Date: 08-Sep-2020 (process 9 of 9)
Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:

U.S. Geological Survey

Attn: VeeAnn A. Cross

Marine Geologist

384 Woods Hole Road
Woods Hole, MA

508-548-8700 x2251 (voice)

508-457-2310 (FAX)

vatnipp@usgs.gov
What similar or related data should the user be aware of?
Poppe, L.J., Williams, S.J., and Paskevich, V.F., 2005, USGS East-Coast Sediment Analysis: Procedures, Database, and GIS Data: Open-File Report 2005-1001, U.S. Geological Survey, Reston, VA.
Online Links:
- http://pubs.usgs.gov/of/2005/1001/
Shepard, F.P., 1954, Nomenclature based on sand-silt-clay ratios: Journal Sedimentary Petrology 24 (3), Society of Economic Paleontologists and Mineralogists, Tulsa, OK.
Online Links:
- http://jsedres.sepmonline.org/cgi/content/abstract/24/3/151
Blackwood, D., and Parolski, K., 2001, Seabed observation and sampling system: Sea Technology v. 42, no. 2, p. 39-43.
Barnhardt, Walter A., Andrews, Brian D., and Butman, Bradford, 2006, High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts: Open-File Report 2005-1293, U.S. Geological Survey, Reston, VA.
Online Links:
- http://pubs.usgs.gov/of/2005/1293/
Ackerman, Seth D., Butman, Bradford, Barnhardt, Walter A., Danforth, William W., and Crocker, James M., 2006, High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts: Open-File Report 2006-1008, U.S. Geological Survey, Reston, VA.
Online Links:
- http://pubs.usgs.gov/of/2006/1008/
Barnhardt, Walter A., Andrews, Brian D., Ackerman, Seth D., Baldwin, Wayne E., and Hein, Christopher J., 2009, High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts: Open-File Report 2007-1373, U.S. Geological Survey, Reston, VA.
Online Links:
- http://pubs.usgs.gov/of/2007/1373/

How reliable are the data; what problems remain in the data set?

How well have the observations been checked?
All attributes were checked in a consistent manner
How accurate are the geographic locations?
Navigation for survey 07003 used differential Global Positioning System (GPS). The recorded position of each sediment sample is actually the position of the GPS antenna on the survey vessel, not the SEABOSS sampler. The SEABOSS was deployed approximately 5 meters astern of the GPS antenna off the ship's J-frame on the starboard side. No layback or offset was applied to the recorded position. In addition to the ±5 meter offset the SEABOSS may drift additionally away from the survey vessel when deployed to the seafloor. Based on the various sources for horizontal offsets, a conservative estimate the horizontal accuracy of the SEABOSS location is 20-30 meters.
How accurate are the heights or depths?
Where are the gaps in the data? What is missing?
Only the subset of grain-size data collected during the R/V Connecticut survey 07003 that are within the study area between Duxbury and Hull have been included in this spatial dataset. Seventy-seven stations were occupied with the SEABOSS in the Duxbury to Hull survey area; however sediment samples were only collected at 28 stations where collecting a sample would not damage the sampling equipment (e.g. no samples were collected in areas with cobble, boulder or rocky seabed, as identified in real-time by video and photos). A total of 184 sampling sites were occupied during survey 07003; and a total of 128 sediment samples were collected. The grain-size data that is not included in this report are from sites south of Brant Rock, Massachusetts and will be published in a subsequent data release focused on Cape Cod Bay.
How consistent are the relationships among the observations, including topology?
No additional checks for topological consistency were performed on this data. Gaps in sequential sample numbers may exist.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints	None
Use_Constraints	Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the source of this information.

Who distributes the data set? (Distributor 1 of 2)

Seth Ackerman

U.S. Geological Survey

Geologist

384 Woods Hole Rd.
Woods Hole, MA

USA

508-548-8700 x2315 (voice)

508-457-2310 (FAX)

sackerman@usgs.gov
What's the catalog number I need to order this data set? Downloadable Data
What legal disclaimers am I supposed to read?
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.

How can I download or order the data?

Availability in digital form:

Data format:	A zip file containing the geospatial data in shapefile format and as a comma-delimited text file, and metadata describing the data set of sediment sample locations collected with the SEABOSS. in format SHP (version ArcGIS 9.3) ESRI point shapefile Size: 0.05
Network links:	http://pubs.usgs.gov/of/2009/1072/GIS/shapefile/DH_SedimentSamples.zip
Media you can order:	DVD-ROM (Density 4.75 Gbytes) (format UDF)

Cost to order the data: None

What hardware or software do I need in order to use the data set?
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com. The shapefile is also distributed in compressed format as one WinZip (ver. 9.0) file. To utilize these data, the user must be able to uncompress the WinZip file.

Who distributes the data set? (Distributor 2 of 2)

Seth Ackerman

U.S. Geological Survey

Geologist

384 Woods Hole Rd.
Woods Hole, MA

USA

508-548-8700 x2315 (voice)

508-457-2310 (FAX)

sackerman@usgs.gov
What's the catalog number I need to order this data set? Downloadable Data
What legal disclaimers am I supposed to read?
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.

How can I download or order the data?

Availability in digital form:

Data format:	A comma-delimited text file containing navigation and grain-size analysis data. The first record contains field headings. in format ASCII (version CSV file) CSV file Size: 0.025
Network links:	http://pubs.usgs.gov/of/2009/1072/GIS/shapefile/DH_SedimentSamples.csv http://pubs.usgs.gov/of/2009/1072/html/appendix1.html
Media you can order:	DVD-ROM (Density 4.75 Gbytes) (format UDF)

Cost to order the data: None

What hardware or software do I need in order to use the data set?
These data are available as a generic ASCII formatted data file. The user must have a software program capable of reading the comma-delimited data file.

Who wrote the metadata?

Dates:

Last modified: 18-Mar-2024

Metadata author:

Seth Ackerman

U.S. Geological Survey

Geologist

384 Woods Hole Rd.

Woods Hole, MA

USA

508-548-8700 x2315 (voice)

508-457-2310 (FAX)

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 USGS. (updated on 20240318)

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2009-1072/DH_SedimentSamples.shp.faq.html>