Pleistocene Gravelly Sand

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: USGS, Woods Hole Field Center

Publication_Date: 2002

Publication_Time: Unknown

Title: Pleistocene Gravelly Sand

Edition: ArcView 3.2

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: USGS, Woods Hole Field Center

Publisher: USGS

Larger_Work_Citation:

Citation_Information:

Originator: Schwab, William C.

Originator: Denny, Jane F.

Originator: Foster, David S.

Originator: Lotto, Linda L.

Originator: Allison, Mead A.

Originator: Uchupi, Elazar

Originator: Swift, B. Ann

Originator: Danforth, William W.

Originator: Thieler, Robert E.

Originator: Butman, Bradford

Publication_Date: 2002

Title:

High-Resolution Quaternary seismic stratigraphy of the New York Bight Continental Shelf

Geospatial_Data_Presentation_Form:

Maps, remote sensing imagery, tabular digital data, and raster and vector digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: OFR02-152

Publication_Information:

Publication_Place: Woods Hole, MA

Publisher: U.S. Geological Survey

Description:

Abstract:

These data orginate from interpretations of seismic reflection and sidescan-sonar data. The derivative data are in an ESRI shapefile, polygon vector format and are intended to represent the distribution of Pleistocene gravelly sand deposits throughout the inner-continental shelf within the New York Bight. These data are helpful in understanding the stratigraphic evolution of the inner-continental shelf, the regional sediment transport system, and the influence of the inner-shelf framework on coastal processes.

Purpose:

A focus for the U.S. Geological Survey (USGS) Coastal and Marine Geology Program is reconnaissance mapping of the shallow Exclusive Economic Zone (EEZ), with initial emphasis on the heavily utilized areas of the sea floor offshore of major metropolitan centers. The objective is to develop a detailed understanding of the sea-floor geology that will provide information for a wide range of management decisions and form a basis for further process-oriented investigations. In 1995, the USGS, in cooperation with the U.S. Army Corps of Engineers (USACOE), New York District, began a program designed to generate reconnaissance maps of the sea floor offshore of the New York - New Jersey metropolitan area), one of the most populated coastal regions within the United States. This mapping effort differs from previous studies of this area by obtaining digital, sidescan-sonar images that cover nearly 100 percent of the sea floor.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19950513

Ending_Date: 19991013

Currentness_Reference: Publication Date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -74.3

East_Bounding_Coordinate: -73.2

North_Bounding_Coordinate: 40.65

South_Bounding_Coordinate: 40.15

Keywords:

Theme:

Theme_Keyword_Thesaurus: New York Bight

Theme_Keyword: Sidescan-sonar

Theme_Keyword: high-resolution seismic

Theme_Keyword: geologic interpretation

Theme_Keyword: Holocene

Theme_Keyword: bedforms

Theme_Keyword: sand ridges

Access_Constraints:

None

Use_Constraints:

Please recognize the USGS as the source of these data.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: US Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

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.

Logical_Consistency_Report:

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.

Completeness_Report:

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

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

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.

Lineage:

Process_Step:

Process_Description:

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.

Process_Date: 2000

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: US Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000089992

Longitude_Resolution: 0.000089992

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS84

Ellipsoid_Name: WGS84

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257223563

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: US Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Resource_Description: pleisgvl.shp

Distribution_Liability:

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 responsibility is assumed by the USGS in the use of these data or related items. Users must assume responsibility 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.

Metadata_Reference_Information:

Metadata_Date: 20020119

Metadata_Review_Date: 2002

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: US Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Metadata_Standard_Name: FGDC Metadata_Standard_Version: FGDC 19940608

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None