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 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: 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 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