Stratigraphic Framework Maps of the inner-continental shelf within the New York Bight: Pleistocene Thickness Grid

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Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Jane F. Denny
Originator: David S. Foster
Originator: William C. Schwab
Originator: B. Ann Swift
Publication_Date: 20010000
Publication_Time: Unknown
Title:
Stratigraphic Framework Maps of the inner-continental shelf within the New York Bight: Pleistocene Thickness Grid
Edition: 1
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: U.S. Geological Survey
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 profile data. The derivative data are in a grid format and are intended to represent the thickness and distribution of Pleistocene deposits throughout the inner-continental shelf within the New York Bight. The gridded Pleistocene thickness is 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. The grid showing thickness of Pleistocene sediment is an important factor in the framework of the coastal region.
Purpose:
In 1995, the U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers (USACE), began a program to generate reconnaissance maps of the sea floor offshore of the New York - New Jersey metropolitan area and within the southern Long Island nearshoe area. Our methods include high-resolution sidescan sonar and subbottom profiling techniques, along with surface grab and vibracore sampling to verify the geophysical interpretations. The goal of the investigation is to provide a regional synthesis of the sea-floor environment, to determine regional-scale availability of sand as a resource for beach nourishment programs, and to investigate the role that inner-shelf morphology and geologic framework have in the evolution of the coastal region within the New York Bight Apex and southern Long Island. Maps derived from interpretation of the subbottom profiles show information on the geometry and distribution of the Quaternary sediments and the underlying coastal-plain unconformity. This seismic stratigraphy yields a regional framework on which explanations of present (and past) sediment movement, dispersal, and erosion processes are based.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19950501
Ending_Date: 19981101
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -74.06
East_Bounding_Coordinate: -71.8000
North_Bounding_Coordinate: 41.2322
South_Bounding_Coordinate: 40.15
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: geologic framework
Theme_Keyword: marine sands and gravels
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: New York Bight
Place_Keyword: Long Island
Place_Keyword: Atlantic Ocean
Place_Keyword: inner-continental shelf
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: Pleistocene
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: US Geological Survey
Contact_Person: Jane F. Denny
Contact_Position: Geologist, Seafloor Mapping Group
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 012543
Country: USA
Contact_Voice_Telephone: 508-457-2311
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: jdenny@usgs.gov
Data_Set_Credit:
This data set resulted from a cooperative with the US Geological Survey and the US Army Corps of Engineers.
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
These data are derived from grids generated from interpretation of 2D seismic reflection profiles. The horizontal resolution of the gridded data are constrained by the grid cell size of 100 meters. Horizontal interpolation is inherent in the gridding process.
Logical_Consistency_Report:
The gridded data were checked for consistency by plotting the Holocene and Quaternary Isopach to ensure that the grid values represent accurate Pleistocene thicknesses, given the aforementioned Isopachs as reference.
Completeness_Report:
The gridded data are limited by horizontal resolution of the grid cell size and spatial distribution of the original point data used to generate the two reference grids: Holocene and Quaternary Isopach. Higher resolution data acquisition will likely result in a more detailed representation of sediment distribution and thickness. The data also represent a time interval of the data acquisition. Attributes may and probably do change with time.
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). Tow fish (sidescan) position was corrected for layback using acoustic slant range measurements and fish pressure depth measurements, otherwise corrected for layback by manual inputs for slant range and fish depth. Accuracy for slant range varies with distance from the ship and the noise conditions in the water, nominally up to 30 meters is better than 2 meters. Pressure depth is accurate to .1 meter. Manual slant range can use cable out measurements or estimates based on data processing results.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical positioning is not necessary to quantify thickness of sediment data. The data are referenced to the distance between the sea floor and the base of the modern sand using an acoustic velocity of 1630 m/s.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Jane F. Denny
Publication_Date: 2002
Publication_Time: unknown
Title:
High-Resolution Quaternary seismic stratigraphy of the New York Bight continental shelf
Edition: 1
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 02-152
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: US Geological Survey
Online_Linkage: <http://woodshole.er.usgs.gov/project-pages/newyork>
Type_of_Source_Media: digital raster data
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: Holocene and Quaternary Isopachs
Source_Contribution:
The Quaternary and Holocene Isopach (gridded data) were used to generate the Pleistocene Isopach. Pleistocene thickness was represented by the difference between the Quaternary and Holocene sediment thickness.
Process_Step:
Process_Description:
The difference between the Quaternary and Holocene Isopachs was used to generate the Pleistocene Isopach within Dynamic Graphics Inc., EarthVision surface modelling software. The resultant grid has a grid cell size of 100, yeilding a grid size of 1007 rows and 1854 columns. The grid was exported as an ASCII raster format file.
Process_Date: 2002
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
Process_Step:
Process_Description:
The exported ASCII Pleistocene thickness grid file from EarthVision was edited to create an ASCII grid file suitable for import to ArcView software. The order of rows were flipped, so that the file begins with the lower row, left column and ends with the upper row right column. An ArcView header that descibes the lower left origin of the grid, the grid cell size, the number of rows and columns, and the null value used (-9999).
Source_Used_Citation_Abbreviation: sandiso
Process_Date: 19990000
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
Process_Step:
Process_Description:
The edited ASCII grid file was imported into ArcView software with the 3D Spatial Analyst extension. The file was saved as a Spatial Analyst (ArcInfo raster grid format) grid.
Source_Used_Citation_Abbreviation: sandiso
Process_Date: 19990000
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David S. Foster
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: 508-457-2271
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: jdenny@usgs.gov
Process_Step:
Process_Description:
Contour data were generated from the Pleistocene Isopach Gridded data at a 5 meter contour interval within EarthVision. These data were exported and converted to an ESRI generate format. The contour interval associated with each contour was saved as an ASCII file and read into ArcView in table format. The generate file was converted to a vector shapefile. The table and attritube table of the contour shapefile were joined based on unique contour IDs. The attribute table was then editted to include the associated contour value with each contour line, and the join was removed. These contour data are stored in the Geographic Coordinate System (decimal degrees, WGSir Ellipsoid).
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
Process_Step:
Process_Description:
The grid and contour data were clipped, using GRIDCLIP script within ArcView 3.2, to the extents of the 1995 and 1996 survey areas.
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: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 485
Column_Count: 649
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -075.000000
Latitude_of_Projection_Origin: +00.000000
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 200
Ordinate_Resolution: 200
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: WGS84
Ellipsoid_Name: WGS84
Semi-major_Axis: 6378137.0000000
Denominator_of_Flattening_Ratio: 298.26
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 1
Altitude_Distance_Units: Meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Depth_System_Definition:
Depth_Datum_Name: Mean sea level
Depth_Resolution: 0.1
Depth_Distance_Units: Meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
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: piso
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 Content Standards for Digital Geospatial
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Generated by mp version 2.7.17 on Fri Apr 12 09:15:08 2002