Stratigraphic Framework Maps of the inner-continental shelf within the New York Bight: Holocene Thickness Grid
Metadata also available as - [Questions & Answers] - [Parseable text]Metadata:
- Identification_Information:
-
- Citation:
-
- Citation_Information:
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- 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: Holocene 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:
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- Series_Name: Open-File Report
- Issue_Identification: OFR02-152
- Publication_Information:
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- Publication_Place: Woods Hole, MA
- Publisher: U.S. Geological Survey
- Description:
-
- Abstract:
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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 Holocene deposits throughout the
inner-continental shelf within the New York Bight. The
gridded Holocene 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 Holocene 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:
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- 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: sand thickness
- Theme_Keyword: sand resources
- Theme_Keyword: sand distribution
- Place:
-
- Place_Keyword_Thesaurus: None
- Place_Keyword: New York Bight
- Place_Keyword: Long Island
- Place_Keyword: Atlantic Ocean
- Place_Keyword: nearshore
- Temporal:
-
- Temporal_Keyword_Thesaurus: None
- Temporal_Keyword: Holocene
- 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 2D seismic reflection profiles
that are spaced approximately 300 meters apart in the cross
track-direction. 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. Thickness of
sediment are set to zero where the base of the modern sand
is not detected (below the vertical reolution of the seismic
system) in the data. 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 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: David S. Foster
- Publication_Date: 1999
- Publication_Time: unknown
- Title:
-
Stratigraphic Framework Maps of the Nearshore Area of Southern Long Island, New York: ridded 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: Modern Sand Thickness along nearshore - southern Long Island
- Source_Contribution:
-
These data were merged with pickes of Holocene
thickness within the New York Bight in order to
generate a composite Holocene isopach for the region.
- 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: Holocene Thickness
- Source_Contribution:
-
Picks of Holocene Thickness were merged with Holocene
thickness within the nearshore off southern Long Island
in order to generate a composite Holocene thickness for
the New York Bight.
- Process_Step:
-
- Process_Description:
-
Processed SEG-Y seismic data and associated shot
navigation data acquired in 1998 within the New York
Bight Apex were loaded into Landmark Seisworks
interpretation software. The reflector at the base of
the moderen marine sand 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 thickness of Holocene deposits. The
resolution of the CHIRP data was poor in the
southeastern portion of the survey area. It was
difficult to resolve Holocene deposits; the thickness
of the deposit may be beyond the resolution of the
system. 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:
-
A Holocene Isopach was generated for a portion of the
inner-continental shelf within the New York Bight Apex
as part of an MS Degree in 1998 (Source_Information 2).
The base of the Holocene was not easily resolved within
the CHIRP data, and thus, there were a limited number
of 'picks' to the base of the Holocene; limited data
from which to generate an isopach. The Holocene Isopach
was generated by hand using a 5 meter contour interval.
Recently, the USGS has revisited these data in order to
refine the existing Holocene Isopach. This original
Holocene Isopach was digitized and imported into
ArcView. The contours of Holocene thickness were
converted into an ArcInfo grid file using the ArcInfo
TopoGridTool. The resultant grid was then desampled by
extracting grid nodes at five minute intervals along
the survey tracklines. The grid was desampled in order
to limit any bias in the data introduced by converting
the 5 meter isopach contours to a continuous grid; i.e.
to aviod imparting a higher resolution to the data than
is reasonable. These data were then exported in ASCII
format file.
- Process_Date: 2001
- 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:
-
ASCII point data were merged and imported to Dynamic
Graphics Inc., EarthVision surface modelling software.
These data were gridded at a 100 meter grid cell size,
yielding 1061 rows and 1853 columns grid size. This
grid was exported as an ASCII format file.
- Process_Date: 1998
- 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 Holocene 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:
-
The resultant grid was clipped, using the GRIDCLIP script within ArcView 3.2,
to the extents of the 1995 and 1996 surveys. The associated contour data
(hand generated during processing step 2) are stored as an ESRI vector shapefile and
fall within the 1995 and 1996 survey areas. These 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
- Spatial_Data_Organization_Information:
-
- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
-
- Raster_Object_Type: Grid Cell
- Row_Count: 454
- Column_Count: 393
- 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: hiso
- 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 09:07:37 2002