Geologic units in the New York Bight

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• 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?
  8. What are the components of this data set?
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• How was the data set created?
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• 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?
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Title: Geologic units in the New York Bight

Abstract:

These data show various geologic units derived from interpretations of seismic reflection and sidescan-sonar data.

1. How should this data set be cited?

   U.S. Geological Survey, 2003, Geologic units in the New York Bight: U.S. Geological Survey, Woods Hole, MA.

   Online Links:

   • <https://pubs.usgs.gov/of/2001/of01-470>

   This is part of the following larger work.

   Schwab, William C., Denny, Jane F., Foster, David S., Lotto, Linda L., Allison, Mead A., Uchupi, Elazar, Swift, B. Ann, Danforth, William W., Thieler, Robert E., and Butman, Bradford, 2002, High-Resolution Quaternary seismic stratigraphy of the New York Bight Continental Shelf: U.S. Geological Survey Open-File Report OF02-152, U.S. Geological Survey, Woods Hole, MA.

   Online Links:

   • <https://pubs.usgs.gov/of/2002/of02-152>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -74.3

   East_Bounding_Coordinate: -73.2

   North_Bounding_Coordinate: 40.65

   South_Bounding_Coordinate: 40.15

3. What does it look like?

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

   Beginning_Date: 13-May-1995

   Ending_Date: 13-Oct-1999

   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):

      • G-polygon

   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 0.000089992. Longitudes are given to the nearest 0.000089992. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is WGS84.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563.
      

7. How does the data set describe geographic features?

8. What are the components of this data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • U.S. Geological Survey

2. Who also contributed to the data set?

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

   Jane F. Denny
   US Geological Survey
   Geologist
   384 Woods Hole Road
   Woods Hole, MA 02543
   USA
   

   508-457-2311 (voice)
   508-457-2310 (FAX)
   jdenny@usgs.gov
   

These data are included in this publication to provide a geologic framework for maps showing the locations of images and samples obtained in the New York Bight.

1. From what previous works were the data drawn?

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

   Date: 2000 (process 1 of 1)

   These data are interpreted and based on acquired high-resolution seismic-reflection, sidescan-sonar, surficial sediment core and grab sample data. These various data types were placed within a Geographic Information System (ESRI ArcView 3.2) within which the interpretations were made. The final interpretations are stored as a polygon ArcView 3.2 shapefile.

   Person who carried out this activity:
   

   Jane F. Denny
   US Geological Survey
   Geologist
   384 Woods Hole Road
   Woods Hole, MA 02543
   USA
   

   508-457-2311 (voice)
   508-457-2310 (FAX)
   jdenny@usgs.gov
   

1. How well have the observations been checked?

   These data are interpretative. They are accurate according to geologic interpretations made by scientists at the USGS, Woods Hole Field Center. These interpretations were based on acquired high-resolution seismic reflection, sidescan-sonar, and surficial core and sample information.

2. How accurate are the geographic locations?

   DGPS is assumed to be accurate within 1-2 meters. Standard GPS is assumed accurate within 5-10 meters. 99% of the positional data is DGPS. Unless noted, all GPS/DGPS data is referenced to WGS84 (NAD83). Slant-range distance is recorded between the sidescan-sonar tow vehicle and a sidemount rigged with an acoustic transponder. Offset between the sidemount and GPS antennae is measured. Basic trigonomic calculations use the slant-range offset to calculate a 'fish' (tow-vehicle) navigation. An assumption in these calculations is that the tow-vehicle is traveling directly behind the vessel; movement to port or starboard is not accounted for within 'fish' navigation. Thus, the horizontal accuarcy of the sidescan-sonar tow-vehicle is +/- 15 meters. The horizontal positioning of the seismic systesm did not account for source and receiver offsets and offset the GPS antennae and the boomer source and streamer. It is estimated that these offsets could lead to inaccuracies of about 30 m.

   Interpretive products are based on the evaluation of sidescan-sonar, seismic-reflection, and sample data. Therefore, the horizontal accuracies of these systems will carry through to the interpretive products. As such, the horizontal accuracy of these data is assumed to be within +/- 30 meters.

3. How accurate are the heights or depths?

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

   These data are complete. These data were published within USGS Open-File Report 00-295.

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

   These data are associated with high-resolution seismic reflection, sidescan-sonar, and surficial sediment core and sample data. They are consistent within their assocations with these data.

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

Access_Constraints: None

Use_Constraints:

This information is not intended for navigational purposes. Please cite Schwab and others (2003) as the source of this information (USGS Open-File Report 02-152, see larger work citation).

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

   Jane F. Denny
   US Geological Survey
   Geologist
   384 Woods Hole Road
   Woods Hole, MA 02543
   USA
   

   508-457-2311 (voice)
   508-457-2310 (FAX)
   jdenny@usgs.gov
   

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

3. What legal disclaimers am I supposed to read?

   Altough this data set and its lineage have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or it's related materials. The act of distribution shall not constitute any such warranty, and no resposibility is assumed by the USGS in the use of these data or related items. Users must assume resposibility for the proper use of this data. This data should not be used at resolutions for which it is not intended. This data has no been reviewed for conformity with US Geological Survey editorial standards, or the North American Strigraphic code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the US Government.

4. How can I download or order the data?

Dates:

Last modified: 19-Jan-2002
Last Reviewed: 2002

Metadata author:

Jane F. Denny
US Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA 02543
USA

508-457-2311 (voice)
508-457-2310 (FAX)
dfoster@usgs.gov

Metadata standard:

FGDC Metadata_Standard_Version: FGDC 19940608 (FGDC-STD-001-1998)