Stratigraphic Framework Maps of the inner-continental shelf within the New York Bight: Gridded Elevation of coastal-plain Unconformity

Metadata also available as - [Questions & Answers] - [Parseable text]

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Jane F. Denny
Originator: David S. Foster
Publication_Date: 20020201
Publication_Time: Unknown
Title:
Stratigraphic Framework Maps of the inner-continental shelf within the New York Bight: Gridded Elevation of coastal-plain Unconformity
Edition: 1
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: US Geological Survey
Online_Linkage: http:/woodshole.er.usgs.gov/project-pages/newyork/
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:
Mapping the elevation of the coastal-plain unconformity is useful for delineating the geologic framework of the New York Bight inner-continental shelf. This in turn aids 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 structure of the coastal-plain unconformity 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: 19950500
Ending_Date: 19981000
Currentness_Reference: Field Work
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: coastal-plain

Theme_Keyword: unconformity
Theme_Keyword: Upper Cretaceous
Theme_Keyword: elevation
Theme_Keyword: grid
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Atlantic Ocean
Place_Keyword: Long Island
Place_Keyword: nearshore
Place_Keyword: New York Bight
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: Cretaceous
Temporal_Keyword: Quaternary
Access_Constraints: None
Use_Constraints: Please recognize the USGS as the source of these data
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
Hours_of_Service: Monday-Friday, 8am-5pm, Eastern Standard Time
Data_Set_Credit:
Prepared by the US Geological Survey in cooperation with the US Army Corps of Engineers
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
These data are derived from 2D seismic reflection profiles that are spaced approximately 1.3 km apart in the cross track-direction. Shore perpendicular track lines were spaced about 3-4 km apart. Along track samples of the seismic profiles are approximately 1 meter assuming a ship speed of 2 meters/second. The data were downsampled in the along-track direction at an interval of about 30 meters. 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 point data over the the grid and comparing point values with grid cell values.
Completeness_Report:
The gridded data are limited by horizontal resolution of the grid cell size and spatial distribution of the original point data. Higher resolution data acquisition will likely result in a more detailed representation of sediment thickness. The data also represent a time interval of the data acquisition. Attributes of elevation of the coastal-plain unconformity change very little over 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). The horizontal positioning 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. Because the elevation of the coastal-plain unconformity was calculated by adding Quaternary thickness to a coastal elevation model //www.ngdc.noaa.gov/mgg/coastal/coastal.html), the horizontal accuracy is constrained by the reference to USGS 3-arc-second topographic data (nominal resolution of 90 meters). Offshore hydrographic positioning that is estimated to be 30 m or better closer to shore. Onshore well locations were digitized from paper maps (Sutter and others, 1949).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical positioning accuracy of the offshore data is based on the seafloor reference used. coastal-plain elevation in the offshore was determined by adding Quaternary sediment thickness (derived from two-way travel time between the coastal-plain unconformity and the seafloor using an acoustic velocity of 1630 m/s) to a topographic and bathymetric elevation model //www.ngdc.nooa.gov/mgg/coastal/coastal.html). This costal elevation model is referenced to USGS 3-arc-second DEM data that has a vertical accuracy of 1 meter and NOS hydrographic data that has an accuracy of 1/10 of a meter. The entire model is referenced to mean sea level. Onshore well elevations were taken from well logs descriptions (Sutter and others, 1949).
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: NOAA
Publication_Date: 19990000
Title: Exposing the U.S. Coastal Zone
Edition: 1
Geospatial_Data_Presentation_Form: model
Series_Information:
Series_Name: EOS, Transactions of the American Geophysical Union
Issue_Identification: vol. 80, no. 4
Publication_Information:
Publication_Place: Boulder, CO
Publisher: NOAA
Online_Linkage: <http://www.ngdc.noaa.gov/mgg/coastal/coastal.html>
Type_of_Source_Media: DVD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19990000
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: Coastal Relief Model
Source_Contribution:
The NOAA Coastal Relief Model was used to reference (topograhic base) subbottom surfaces to mean sea level
Source_Information:
Source_Citation:
Citation_Information:
Originator: Linda Lotto
Publication_Date: 20000000
Publication_Time: Unknown
Title:
Seismic Stratigraphy and Quaternary Evolution of the New York Bight Inner Continental Shelf
Edition: 1
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: Texas A&M University
Issue_Identification: unpublished MS Thesis
Publication_Information:
Publication_Place: College Station, TX
Publisher: Texas A&M University
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20000000
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: Onshore Well Logs
Source_Contribution:
Well logs from the New York State Department of Conservation and the USGS were analyzed by Lotto (2000) to determine the elevation of the coastal-plain unconformity on land.
Source_Information:
Source_Citation:
Citation_Information:
Originator: David S. Foster
Publication_Date: 1999
Publication_Time: unknown
Title:
Stratigraphic Framework Maps of the Nearshore Area of Southern Long Island, New York: Gridded Elevation of coastal-plain Unconformity
Edition: 1
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey
Issue_Identification: USGS Open-File Report
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: U.S. Geological Survey
Online_Linkage: <http://woodshole.er.usgs.gov/epubs/openfiles/ofr99-559/>
Type_of_Source_Media: paper products
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1999
Time_of_Day: unknown
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation:
Gridded elevation of the coastal-plain Unconformity along nearshore off southern Long Island (Fire Island - Montauk)
Source_Contribution:
These data were combined with the grid of the elevation of the Coastal plain unconformity within the New York Bight (west of the Long Island area) in order to generate a composite grid of the elevation of the Coastal plain unconformity within the inner-continental shelf of the New York Bight.
Process_Step:
Process_Description:
Processed SEG-Y seismic data and associated shot navigation data acquired within the New York Bight, were loaded into Landmark Seisworks interpretation software. The coastal-plain unconformity was digitized along with the seafloor reflector. The difference in two-way travel time between horizons was calculated and converted to meters using an assumed velocity of 1630 m/s. This represents the nearshore Quaternary sediment thickness. These data were exported from seisworks to an ASCII format file.

Process_Date: 20010000
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 ASCII point data were imported to Dynamic Graphics Inc., EarthVision surface modelling software. The points representing Quaternary sediment thickness were gridded with a 200 meter grid cell size. Bathymetric data that were collected the same time as the seismic profile data were gridded using a 150 m grid cell size. The Quaternary sediment thickness grid was addded to the bathymetric grid to yield a grid for the nearshore elevation of the Coastal plain unconformity reference to mean sea level.

Process_Date: 20010000
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 file from the nearshore coastal-plain unconformity elevation was combined with onshore well elevations of the coastal-plain unconformity.

Process_Date: 20010000
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 total onshore and nearshore coastal-plain unconformity elevations were imported into EarthVision. The data were gridded at a 200 m grid spacing.

Process_Date: 20010000
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 resultant grid represented the onshore and offshore elevation of coastal-plain unconformity for all of Long Island and the inner-shelf region from the New Jersey coast to Long Beach. A grid of the elevation of the Coastal plain unconformity along the nearshore of southern Long Island was generated in a study published in 1999 (USGS Open-File Report, 00-243). To generate a composite grid of the elevation of the Coastal plain unconformity, the two grids were merged within EarthVision, using the union command. Minor edits were required at the boundaries of the union.
Process_Date: 20011101
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 coastal-plain unconformity elevation 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).
Process_Date: 20010000
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 Spatial Analyst extension. The file was saved as an ArcInfo raster grid format.
Process_Date: 20010000
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:
Contour data were generated from the coastal-plain Unconformity 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. The contour data are stored in the Geographic Coordinate System (decimal degrees, WGS84 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 resultant grid and contour data were clipped to the 1995 and 1996 survey extents and all of Long Island using GRIDCLIP script within ArcView 3.2.
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: 631
Column_Count: 971
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: cpof_grd
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
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 09:20:14 2002