U.S. Geological Survey 20150304 vector digital data Reston, Virginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?ds926_fas_low_perm_areas_gulf_trough U.S. Geological Survey 20150304 Publication U.S. Geological Survey Data Series 926 Reston, Virginia U.S. Geological Survey https://pubs.usgs.gov/ds/0926/ Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system were developed to define an updated hydrogeologic framework as part of the U.S. Geological Survey Groundwater Resources Program. This feature class contains low permeability areas of the Gulf Trough determined from well data provided by the Georgia Environmental Protection Division Agricultural Permitting Unit The dataset contains structural surfaces depicting the top and base of the aquifer system, its major and minor hydrogeologic units and zones, geophysical marker horizons, and the altitude of the 10,000-milligram-per-liter total dissolved solids boundary that defines the approximate fresh and saline parts of the aquifer system. The thicknesses of selected major and minor units or zones were determined by interpolating points of known thickness or from raster surface subtraction of the structural surfaces. Additional data contained include clipping polygons; regional polygon features that represent geologic or hydrogeologic aspects of the aquifers and the minor units or zones; data points used in the interpolation; and polygon and line features that represent faults, boundaries, and other features in the aquifer system. Shows the approximate extent of the lower permeable areas of the Floridan aquifer system within the Gulf Trough. 19400101 010000 20130101 010000 Temporal Period Extent: 1940-2013 Complete None planned -84.380933 -81.763066 32.461154 30.782592 USGS Thesaurus Hydrogeology Stratigraphy Floridan aquifer system Geology Regional Groundwater Availability Study USGS United States Geological Survey contour thickness FAS inlandWaters ISO 19115 Topic Categories environment geoscientificInformation inlandWaters USGS Metadata Identifier USGS:1226f045-f846-4583-bcbd-4dddbf9d639c Geographic Names Information System Florida Georgia Alabama South Carolina None None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. U.S. Geological Survey Joann Dixon IT Specialist mailing address

4446 Pet Lane, Suite 108

Lutz FL 33559 USA 407-803-5533 jdixon@usgs.gov https://water.usgs.gov/GIS/browse/fas_low_perm_areas_gulf_trough.jpg fas_low_perm_areas_gulf_trough jpg Williams, L.J. and Kuniansky, E.L., 2015, Revised Hydrogeologic Framework of the Floridan aquifer system in Florida and Parts of Georgia, Alabama, and South Carolina, U.S. Geological Survey Professional Paper 1807. Report available from: https://pubs.usgs.gov/pp/1807/ or http://doi.org/10.3133/pp1807 None Unclassified None Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2.3552 U.S. Geological Survey 1999 map Principal aquifers of the United States (modified from Principal Aquifers, U.S. Geological Survey, 2003). National Atlas product Reston, VA U.S. Geological Survey https://water.usgs.gov/GIS/dsdl/USAaquiferMAP11_17.pdf U.S. Geological Survey 1989 map Hydrologic Investigations Atlas HA 730 Reston, VA U.S. Geological Survey, Water Resources Division https://pubs.usgs.gov/ha/ha730/index.html Vector GT-polygon composed of chains 29 NAD 1983 Albers 29.5 45.5 -84.0 23.0 0.0 0.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 fas_low_perm_areas_gulf_trough Extent of the low-permeable areas of the Floridan aquifer system in the Gulf Trough USGS OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. Esri Coordinates defining the features. Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical

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Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov Downloadable Data Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. File Geodatabase Feature Class Online accessible data downloadable data zipped 68800 https://water.usgs.gov/GIS/dsdl/ds926_gdb.zip Shape File Online accessible data downloadable data zipped 84500 https://water.usgs.gov/GIS/dsdl/ds926_shapefiles.zip ARC export Online accessible data WinZip compressed file 21600 https://water.usgs.gov/GIS/dsdl/ds926_ASCII_rasters.zip None. No fees are applicable for obtaining the data set. 20201117 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998