From April 13-20, 2013, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS-SPCMSC) conducted geophysical surveys and collected sediment samples from Dauphin Island, Alabama. This dataset, Ground Penetrating Radar (GPR) Trackline Locations Collected from Dauphin Island, Alabama, in April 2013, contains geospatial data and raster images of the GPR data. The GPR trackline locations are presented as Geographic Information System (GIS) files and the subsurface profile data are provided as images in Joint Photographic Experts Group (JPEG) format.
The objectives of this study were to quantify inorganic and organic accretion rates in back-barrier and mainland marsh and estuarine environments. Various field and laboratory methods were used to achieve these objectives, including, subsurface imaging using GPR, sediment sampling, lithologic and microfossil analyses, and geochronology techniques to produce barrier island stratigraphic cross sections to help interpret the recent (last 2000 years) geologic evolution of the island.
Data were collected during USGS field activity number 13BIM01, additional survey details are available at http://cmgds.marine.usgs.gov/fan_info.php?fan=13BIM01
. Funding for this survey was provided by the USGS Coastal and Marine Geology Program’s Barrier Island Evolution Research (BIER) project (http://coastal.er.usgs.gov/bier/)
The GIS data for this survey are provided in Environmental Systems Research Institute (Esri) polyline shapefile (.shp) and Keyhole Markup Language (KML) formats; these files can be opened using the free ArcGIS Explorer or Google Earth GIS viewers. The .kml files, profile images, map document, and shapefile used to create the hyperlinked GPR trackline map can be found at pubs.usgs.gov/ds/0982/ds_data_downloads.html. Included in the GIS .zip file is a folder called “images,” which stores the .jpg images of each trackline's subsurface profile. To access these images using ArcMap 10.2, open the map document and then click on the hyperlink button (the symbol is a lightning bolt) located on the toolbar. Once this button is activated, the tracklines will all change to blue, indicating they have hyperlinks. Selecting a trackline will open the associated profile image.
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: Ground Penetrating Radar (GPR)
Theme_Keyword: subsurface profile
Theme_Keyword: Global Positioning System (GPS)
Theme_Keyword: Environmental Systems Research Institute (Esri)
Theme_Keyword: Keyhole Markup Language (KML)
Theme_Keyword: Barrier Island Mapping
Place_Keyword: United States of America
Place_Keyword: Dauphin Island
Place_Keyword: Mobile Bay
Place_Keyword: Mississippi Sound
Place_Keyword: Gulf of Mexico
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originators of the data in future products or derivative research. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations.
Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2 (Build 3552) Service Pack N/A (Build N/A)