GARRISON66: Sediments on the Shelf off Southern New England

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title: GARRISON66: Sediments on the Shelf off Southern New England

Abstract:

The sediments and geomorphology of a portion of the northeastern continental shelf between Hudson Canyon and Georges Bank have been investigated. Wave-cut terraces at 13, 45, 65, and 80 fathoms indicate four former low sea levels, while concentrations of beach ridges around 35 fathoms reveal a fifth. The pre-Holocene drainage pattern, still exposed over part of the area, shows that Block Channel was the main stream system which drained most of southern New England. The surface sediments on the western part of the study area are Late Pleistocene fluvial deposits. Overlying these coarse deposits in the central part of the outer shelf is a sandy silt facies that is also relict. The youngest facies and the only area of present deposition, is in the northeastern part where sand eroded from Nantucket Shoals is being deposited on the shelf.

1. How should this data set be cited?

   Poppe, Lawrence J. , 2003, GARRISON66: Sediments on the Shelf off Southern New England:, U. S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.

   Online Links:

   • <http://pubs.usgs.gov/of/2003/of03-001/data/seddata/garrison66/garrison66.zip>
   • <http://pubs.usgs.gov/of/2003/of03-001/data/seddata/garrison66/garrison66.zip>

   This is part of the following larger work.

   Poppe, L.J., Paskevich, V.F., Williams, S.J., Hastings, M.E., Kelley, J.T., Belknap, D.F., Ward, L.G., FitzGerald, D.M., and Larsen, P.F., 2003, Surficial Sediment Data from the Gulf of Maine, Georges Bank, and vicinity: a GIS Compilation: Open-File Report 03-001, U. S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.

   Online Links:

   • <http://pubs.usgs.gov/of/2003/of03-001>
   • <http://pubs.usgs.gov/of/2003/of03-001>

   Other_Citation_Details:

   Data is released via CD-ROM media. This digital publication may also be available via the web at pubs.usgs.gov

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -72.447000

   East_Bounding_Coordinate: -69.467000

   North_Bounding_Coordinate: 40.970000

   South_Bounding_Coordinate: 39.533000

3. What does it look like?

   garisson66 (GIF)

   Image map showing extent and distribution of data layer coverage.

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 1966

   Currentness_Reference: publication date

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: vector digital data

6. 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 (145)

   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 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.
      

7. How does the data set describe geographic features?

   garrison66.dbf

   Shapefile Attribute Table (Source: ESRI)

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   CONSECNO

   Sample id assigned to distinguish between stations. (Source: Complier)

   Range of values
   Minimum:	1
   Maximum:	145
   Units:	integer count
   Resolution:	1

   PROJECTID

   Project id assigned to the data set for future identification. (Source: Compiler)

   Value	Definition
   GARRISON66	Scientist and year of publication

   CRUISEID

   Abbreviation of ship name and cruise number. (Source: Scientist)

   Value	Definition
   TR-009	Ship and cruise

   STATION

   Site at which a sample was taken (Source: Scientist)

   Assigned characters and numerics

   DEVICE

   Specific grab or core used to collect a sample (Source: Scientist)

   Value	Definition
   SMITH-MACINTYRE GRAB	Smith-MacIntyre Grab Sampler
   VANVEEN GRAB	VanVeen Grab Sampler
   PISTON CORE	Piston Core sampling device
   GRAVITY CORE	Gravity Core sampling device

   DATE

   Year, month and day when sample was collected (Source: Scientist)

   Character String; YYYMMDD

   LATITUDE

   Latitude coordinates of sample location. (Source: Scientist)

   Range of values
   Minimum:	39.5300
   Maximum:	40.9700
   Units:	decimal degrees
   Resolution:	.0001

   LONGITUDE

   Longitude of sample station. (Source: Scientist)

   Range of values
   Minimum:	-72.447
   Maximum:	-69.467
   Units:	decimal degrees
   Resolution:	.001

   DEPTH

   Water depth in meters at the corresponding station. (Source: Scientist)

   Range of values
   Minimum:	40
   Maximum:	355
   Units:	meters
   Resolution:	1

   DOMINANT_L

   Primarly lithology (Source: Scientist)

   Value	Definition
   SAND	Sand content
   MUD	Mud content
   CLAY	Clay content
   SILT	Silt content

   SECOND_LIT

   Secondary lithology (Source: Scientist)

   Value	Definition
   CLAY	Clay content
   COARSER THAN SAND	coarser than sand
   SAND	Sand content
   SILT	Silt content

   Field is blank; no secondary lithology assigned

   GRAVEL

   Percentage of gravel in a sample (Source: Scientist)

   Range of values
   Minimum:	0
   Maximum:	39
   Units:	percent
   Resolution:	0.01

   SAND

   Percentage of sand in a sample. (Source: Scientist)

   Range of values
   Minimum:	0
   Maximum:	99.8
   Units:	percent
   Resolution:	0.01

   SILT

   Percentage of silt in a sample (Source: Scientist)

   Range of values
   Minimum:	0
   Maximum:	83.59
   Units:	percent
   Resolution:	0.01

   CLAY

   Percentage of clay in a sample (Source: Scientist)

   Range of values
   Minimum:	0
   Maximum:	40.52
   Units:	percent
   Resolution:	0.01

   SHEPARD_CL

   Classification of the sediment size distribution based on a scheme devied by Shepard (1954) (Source: Compiler)

   Value	Definition
   SAND	Sand content
   SAND SILT CLAY	sand, silt and clay content
   SANDY SILT	sandy silt content
   SILT	silt content
   SILTY SAND	silty sand content

   Character string; Verbal equivalents of the Shephard classification scheme

   Field is blank; no classification is assigned

   Entity_and_Attribute_Overview:

   Sediment grain-size data, textural classifications, lithologic descriptions, navigation, and identifiers for the samples collected aboard the Trident by Garrison and McMaster (1966)

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Lawrence J. Poppe

2. Who also contributed to the data set?

   Please review the cross section information for the original data set credit to L.E. Garrison and R.L. McMaster (1966). Larry Poppe for entering the data from the source report and creating the ArcView shapefile.

3. To whom should users address questions about the data?

   Lawrence J. Poppe
   U.S. Geological Survey
   Geologist
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   508-548-8700 x2314 (voice)
   508-457-2310 (FAX)
   lpoppe@usgs.gov
   

The purpose of this data layer is to release a digital version of the sediment data published in Garrison and McMaster (1966).

1. From what previous works were the data drawn?

   (source 1 of 1)

   Garrison, L.E., and McMaster, R.L., 1966, Sediments and Geomorphology of the Continental Shelf off Southern New England: Marine Geology v. 4, p. 273-289., Elsevier, Amsterdam.

   Type_of_Source_Media: paper

2. How were the data generated, processed, and modified?

   Date: 10-Sep-2002 (process 1 of 1)

   The navigation was digitized from maps in the original paper. The remaining source information was manually entered into digital form and together were imported from an ASCII text file into an ArcView table. The table was later converted to an event theme in ArcView and saved as the final shapefile.

   Person who carried out this activity:
   

   Lawrence J. Poppe
   U.S. Geological Survey
   Geologist
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   508-548-8700 x2314 (voice)
   508-457-2310 (FAX)
   lpoppe@usgs.gov
   

   Data sources used in this process:

   • garrison66.txt

   Data sources produced in this process:

   • garrison66.shp
   • garrison66.dbf
   • garrison66.shx

1. How well have the observations been checked?

2. How accurate are the geographic locations?

   Navagational methods are not discussed in the original report. Horizontal accuracy is unknown.

3. How accurate are the heights or depths?

   Tides are less han 2 m

4. Where are the gaps in the data? What is missing?

   Sample locations and textural classifications are provided for 145 grab and coring stations.

5. How consistent are the relationships among the observations, including topology?

   No additional checks for topological consistency were performed on this data.

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

Access_Constraints: None

Use_Constraints: None

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

   Lawrence J. Poppe
   U.S. Geological Survey
   Geologist
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   508-548-8700 x2314 (voice)
   508-457-2310 (FAX)
   lpoppe@usgs.gov
   

2. What's the catalog number I need to order this data set?

   Regional Mapping of Surficial Sediments: Gulf of Maine and Georges Bank, Aggregates and Habitats Projects, garrison66.shp

3. What legal disclaimers am I supposed to read?

   Although this data set has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Five files (garrison66.shp, garrison66.dbf, garrison66.shx, garrison66.sbx, garrison66.sbn) comprising the ArcView point shapefile components, 'prj' and 'avl' files, metadata text file and browse graphic. in format ArcView shapefile (version 3.2) ESRI point shapefile Size: 0.162
     Media you can order:	CD-ROM (Density 650 Mbytes) Note: The user must have a computer system with a CD-ROM available. To browse the information contained on this CD-ROM, the user must have a current WWW browser available. The user must also have software installed on their computer to unzip the archived file.

   • Cost to order the data: None

5. What hardware or software do I need in order to use the data set?

   The data is availabe in ArcView shaefile format. The user must have ESRI's ArcView 3.0 or greater software to read and process the data file. In lieu of ArcVew, the user may utilize another GIS application package capable of importing data.

Dates:

Last modified: 21-Mar-2003

Metadata author:

Lawrence J. Poppe
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

508-548-8700 x2314 (voice)
508-457-2310 (FAX)
lpoppe@usgs.gov

Metadata standard:

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

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