TRANSGR_GRD - ESRI ArcRaster grid representing the elevation of the regional transgressive unconformity underlying the inner shelf of Long Bay, South Carolina
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: U.S. Geological Survey
- Publication_Date: 2007
- Title:
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TRANSGR_GRD - ESRI ArcRaster grid representing the elevation of the regional transgressive unconformity underlying the inner shelf of Long Bay, South Carolina
- Edition: 1.0
- Geospatial_Data_Presentation_Form: raster digital data
- Series_Information:
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- Series_Name: Open-File
- Issue_Identification: 2005-1346
- Online_Linkage: <http://pubs.usgs.gov/of/2005/1346/arcgis/sf_env/seafloorenv.zip>
- Larger_Work_Citation:
-
- Citation_Information:
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- Originator: Baldwin, W.E.
- Originator: Denny, J.F.
- Originator: Schwab, W.C.
- Originator: Gayes, P.T.
- Originator: Morton, R.A.
- Originator: Driscoll, N.W.
- Publication_Date: 2007
- Title:
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Geologic Framework Studies of South Carolina's Long Bay from Little River Inlet to Winyah Bay, 1999-2003; geospatial data release
- Edition: 1.0
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: 2005-1346
- Publication_Information:
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- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Online_Linkage: <http://pubs.usgs.gov/of/2005/1346/>
- Description:
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- Abstract:
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In 1999, the USGS, in partnership with the South Carolina Sea Grant Consortium, began a study to investigate processes affecting shoreline change along the northern coast of South Carolina, focusing on the Grand Strand region. Previous work along the U.S. Atlantic coast shows that the structure and composition of older geologic strata located seaward of the coast heavily influences the coastal behavior of areas with limited sediment supply, such as the Grand Strand. By defining this geologic framework and identifying the transport pathways and sinks of sediment, geoscientists are developing conceptual models of the present-day physical processes shaping the South Carolina coast. The primary objectives of this research effort are: 1) to provide a regional synthesis of the shallow geologic framework underlying the coastal upland, shoreface and inner continental shelf, and define its role in coastal evolution and modern beach behavior; 2) to identify and model the physical processes affecting coastal ocean circulation and sediment transport, and to define their role in shaping the modern shoreline; and 3) to identify sediment sources and transport pathways; leading to construction of a regional sediment budget.
- Purpose:
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This data set contains a surface depicting the elevation of the regional transgressive unconformity underlying the inner shelf of Long Bay, offshore of the South Carolina Grand Strand. Chirp seismic data collected with Benthos SIS-1000 and Edgetech SB-512 acquisition systems were processed using SIOSEIS (Scripps Institute of Oceanography) and Seismic Unix (Colorado School of Mines) to produce segy files and jpg images of the profiles. Data were then imported into Landmark SeisWorks, a digital seismic interpretation package, where the sea floor and underlying transgressive surface were interpreted and digitized. The isopach between these horizons was exported at every 50th shot as xyz points, and imported to ArcGIS for interpolation into a 10-m raster grid. The isopach grid was then subtracted from a seafloor bathymetry grid (bathy_grd) to approximate the proper elevation of the transgressive unconformity beneath the sea floor.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 1999
- Ending_Date: 2003
- Currentness_Reference: publication date
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: None planned
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -79.158619
- East_Bounding_Coordinate: -78.514899
- North_Bounding_Coordinate: 33.855993
- South_Bounding_Coordinate: 33.188888
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: General
- Theme_Keyword: U.S. Geological Survey
- Theme_Keyword: USGS
- Theme_Keyword: Woods Hole Science Center
- Theme_Keyword: WHSC
- Theme_Keyword: Coastal and Marine Geology Program
- Theme_Keyword: CMGP
- Theme_Keyword: seismic reflection profiles
- Theme_Keyword: seafloor geology
- Theme_Keyword: Benthos SIS-1000
- Theme_Keyword: Edgetech SB-512
- Theme_Keyword: Chirp
- Theme_Keyword: ArcGIS Raster
- Theme_Keyword: transgressive unconformity
- Theme_Keyword: elevation
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: oceans
- Theme_Keyword: oceans and coastal
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: geoscientificInformation
- Place:
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- Place_Keyword_Thesaurus: General
- Place_Keyword: South Carolina
- Place_Keyword: Grand Strand
- Place_Keyword: North Myrtle Beach
- Place_Keyword: Myrtle Beach
- Place_Keyword: Surfside
- Place_Keyword: Garden City
- Place_Keyword: Pawleys Island
- Place_Keyword: Waites Island
- Place_Keyword: Southeast United States
- Place_Keyword: United States
- Place_Keyword: Atlantic Ocean
- Access_Constraints: None
- Use_Constraints:
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Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
- Point_of_Contact:
-
- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Wayne Baldwin
- Contact_Organization: U.S. 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: 02543-1598
- Country: USA
- Contact_Voice_Telephone: 508-548-8700 x2226
- Contact_Facsimile_Telephone: 508-457-2310
- Contact_Electronic_Mail_Address: wbaldwin@usgs.gov
- Browse_Graphic:
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- Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2005/1346/images/transgr_grd.jpg>
- Browse_Graphic_File_Description:
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elevation of regional transgressive unconformity underlying the Long Bay inner shelf
- Browse_Graphic_File_Type: JPEG
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
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These data were interpretted from seismic-reflection and
bathymetric data at a regional scale of 1:75,000.
- Completeness_Report:
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All interpretations of paleochannel unconformities are present in this data set
- Logical_Consistency_Report:
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No additional checks for topological consistency were performed on the data.
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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Interpretations are derived from seismic-reflection and bathymetric data at a
regional scale of 1:75000.
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report:
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Seismic data are not corrected for tides. Thickness of Holocene surficial sediments was calculated as the distance between the seafloor and the underlying transgressive surface from interpretation of seismic reflection profiles. An isopach grid of the thickness of Holocene surficial sediments (sedthick_grd) was then subtracted from a gridded surface of seafloor bathymetry (bathy_grd) to generate a grid representing the regional elevation beneath the seafloor.
- Lineage:
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- Source_Information:
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- Source_Citation:
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- Citation_Information:
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- Originator: U.S. Geological Survey
- Publication_Date: 2007
- Title:
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SEDTHICK_GRD - ESRI ArcRaster representing the isopach of Holocene surficial sediment within the inner shelf of Long Bay, South Carolina
- Edition: 1.0
- Geospatial_Data_Presentation_Form: raster digital data
- Series_Information:
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- Series_Name: Open-File
- Issue_Identification: 225-1346
- Publication_Information:
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- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Online_Linkage:
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<http://pubs.usgs.gov/of/2005/1346/arcgis/seismic_srf/sedthick_grd.zip>
- Larger_Work_Citation:
-
- Citation_Information:
-
- Originator: Baldwin, W.E.
- Originator: Denny, J.F.
- Originator: Schwab, W.C.
- Originator: Gayes, P.T.
- Originator: Morton, R.A.
- Originator: Driscoll, N.W.
- Publication_Date: 2007
- Title:
-
Geologic Framework Studies of South Carolina's Long Bay from Little River Inlet to Winyah Bay, 1999-2003; geospatial data release
- Edition: 1.0
- Series_Information:
-
- Series_Name: Open-File Report
- Issue_Identification: 2005-1346
- Publication_Information:
-
- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Online_Linkage: <http://pubs.usgs.gov/of/2005/1346/>
- Type_of_Source_Media: DVD-ROM
- Source_Time_Period_of_Content:
-
- Time_Period_Information:
-
- Single_Date/Time:
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- Calendar_Date: 2007
- Source_Currentness_Reference: publication date
- Source_Citation_Abbreviation: sedthick_grd, v1.0, 2006
- Source_Contribution:
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This data set contains polygons that identify the geologic unit type present in outcrop or subcrop along the Long Bay inner shelf. Polygon areas are based upon digital interpretations of Chirp seismic reflection data and coastal plain boreholes. A polygon outlining the inner shelf study area was erased (ArcGIS Analysis toolbox) in iterations using polygons outlining gridded surfaces of Holocene surficial sediment (sedthick_grd) and paleochannel unconformities (paleoch_grd). Outside of the area covered by the Holocene surficial sediment grid, seismic data indicate surficial sediment cover of < 50 cm. In these areas, paleochannel fills, Cretaceous, and Tertiary units are interpreted to crop out at the sea floor, or subcrop near the surface.
- Source_Information:
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- Source_Citation:
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- Citation_Information:
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- Originator: U.S. Geological Survey
- Publication_Date: 2007
- Title:
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BATHY - Bathymetry within the inner shelf of Long Bay, South Carolina collected by the USGS, 1999-2003 (Grid)
- Edition: 1.0
- Geospatial_Data_Presentation_Form: raster digital data
- Series_Information:
-
- Series_Name: Open-File
- Issue_Identification: 2005-1346
- Publication_Information:
-
- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey
- Online_Linkage: <http://pubs.usgs.gov/of/2005/1346/arcgis/bathy/bathy_grd.zip>
- Larger_Work_Citation:
-
- Citation_Information:
-
- Originator: Baldwin, W.E.
- Originator: Denny, J.F.
- Originator: Schwab, W.C.
- Originator: Gayes, P.T.
- Originator: Morton, R.A.
- Originator: Driscoll, N.W.
- Publication_Date: 2007
- Title:
-
Geologic Framework Studies of South Carolina's Long Bay from Little River Inlet to Winyah Bay, 1999-2003; geospatial data release
- Edition: 1.0
- Series_Information:
-
- Series_Name: Open-File Report
- Issue_Identification: 2005-1346
- Publication_Information:
-
- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Online_Linkage: <http://pubs.usgs.gov/of/2005/1346/>
- Type_of_Source_Media: DVD-ROM
- Source_Time_Period_of_Content:
-
- Time_Period_Information:
-
- Single_Date/Time:
-
- Calendar_Date: 2007
- Source_Currentness_Reference: publication date
- Source_Citation_Abbreviation: bathy, v1.0, 2006
- Source_Contribution:
-
This data set contains polygons that identify the geologic unit type present in outcrop or subcrop along the Long Bay inner shelf. Polygon areas are based upon digital interpretations of Chirp seismic reflection data and coastal plain boreholes. A polygon outlining the inner shelf study area was erased (ArcGIS Analysis toolbox) in iterations using polygons outlining gridded surfaces of Holocene surficial sediment (sedthick_grd) and paleochannel unconformities (paleoch_grd). Outside of the area covered by the Holocene surficial sediment grid, seismic data indicate surficial sediment cover of < 50 cm. In these areas, paleochannel fills, Cretaceous, and Tertiary units are interpreted to crop out at the sea floor, or subcrop near the surface.
- Process_Step:
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- Process_Description:
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The ARCGIS raster calculator was used to subract a grid representing Holocene surficial sediments (sedthick_grd) from the regional seafloor bathymetry grid (bathy_grd) to approximate the proper elevation of the transgressive unconformity beneath the sea floor.
- Source_Used_Citation_Abbreviation: sedthick_grd, v1.0, 2006
- Source_Used_Citation_Abbreviation: bathy, v1.0, 2006
- Process_Date: 2003
- Source_Produced_Citation_Abbreviation: trans_grd
- Process_Contact:
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- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Wayne Baldwin
- Contact_Organization: U.S. 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: 508-548-8700 x2226
- Contact_Facsimile_Telephone: 508-457-2310
- Contact_Electronic_Mail_Address: wbaldwin@usgs.gov
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Grid Cell
- Row_Count: 728
- Column_Count: 583
- Vertical_Count: 1
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
-
- Planar:
-
- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: Universal Transverse Mercator
- Universal_Transverse_Mercator:
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- UTM_Zone_Number: 17
- Transverse_Mercator:
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- Scale_Factor_at_Central_Meridian: 0.999600
- Longitude_of_Central_Meridian: -81.00000
- Latitude_of_Projection_Origin: 0.0000000
- False_Easting: 500000.000000
- False_Northing: 0.000000
- Planar_Coordinate_Information:
-
- Planar_Coordinate_Encoding_Method: row and column
- Coordinate_Representation:
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- Abscissa_Resolution: 100.000
- Ordinate_Resolution: 100.000
- Planar_Distance_Units: meters
- Geodetic_Model:
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- Horizontal_Datum_Name: D_WGS_1984
- Ellipsoid_Name: WGS_1984
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257224
- Vertical_Coordinate_System_Definition:
-
- Depth_System_Definition:
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- Depth_Datum_Name: Mean lower low water
- Depth_Resolution: 0.5
- Depth_Distance_Units: meters
- Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
- Entity_and_Attribute_Information:
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- Overview_Description:
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- Entity_and_Attribute_Overview: Elevation of paleochannel unconformities in ESRI GRID format.
- Entity_and_Attribute_Detail_Citation: usgs
- Distribution_Information:
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- Distributor:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Wayne Baldwin
- Contact_Organization: U.S. 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: 508-548-8700 x2226
- Contact_Facsimile_Telephone: 508-457-2310
- Contact_Electronic_Mail_Address: wbaldwin@usgs.gov
- Resource_Description: Downloadable Data
- Distribution_Liability:
-
Although all data 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 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 materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
- Standard_Order_Process:
-
- Digital_Form:
-
- Digital_Transfer_Information:
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- Format_Name: ARCG
- Format_Version_Number: ArcGIS 9.0
- Format_Specification: ESRI ArcRaster GRID format
- Format_Information_Content: no compression applied
- Transfer_Size: 2.266
- Digital_Transfer_Option:
-
- Online_Option:
-
- Computer_Contact_Information:
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- Network_Address:
-
- Network_Resource_Name:
-
<http://pubs.usgs.gov/of/2005/1346/arcgis/seismic_srf/transgr_grd.zip>
- Access_Instructions: Data can be downloaded via the World Wide Web (WWW)
- Offline_Option:
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- Offline_Media: DVD-ROM
- Recording_Capacity:
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- Recording_Density: 4.75
- Recording_Density_Units: Gbytes
- Recording_Format: UDF
- Fees: None
- Technical_Prerequisites:
-
These data are available in Environmental Systems Research Institute (ESRI) GRID format. The user must have software capable of importing and processing the data file.
- Metadata_Reference_Information:
-
- Metadata_Date: 20070123
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Wayne Baldwin
- Contact_Organization: U.S. 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: 02543-1598
- Country: USA
- Contact_Voice_Telephone: 508-548-8700 x2226
- 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_Time_Convention: local time
- Metadata_Extensions:
-
- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.2 on Fri Mar 09 10:00:23 2007