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GWRP > Regional Groundwater Availability Studies Geospatial Data > Mississippi Embayment

Mississippi Embayment Aquifer System

 [Image: Mississippi Embayment aquifer location map.]

Hydrogeologic units of the Mississippi embayment aquifer system include the Mississippi River Valley alluvial aquifer, Vicksburg-Jackson confining unit, the upper Claiborne aquifer, the middle Claiborne confining unit, the middle Claiborne aquifer, the lower Claiborne confining unit, the lower Claiborne aquifer, the middle Wilcox aquifer, the lower Wilcox aquifer, and the Midway confining unit.

The data files listed below are supplemental to the USGS Scientific Investigations Report 2008-5098 titled 'Digital surfaces and thicknesses of selected hydrogeologic units within the Mississippi Embayment Regional Aquifer Study (MERAS).' The report includes a description of methods used to derive the data.

Click on the links below to download files (see Explanation of spatial data formats).


  • Hydrogeologic Unit Extents:
        Vicksburg-Jackson Group    Metadata (12 KB)    Shapefile (97 KB)
        Upper Claiborne aquifer    Metadata (12 KB)    Shapefile (118 KB)
        Middle Claiborne confining unit    Metadata (12 KB)    Shapefile (105 KB)
        Middle Claiborne aquifer    Metadata (12 KB)    Shapefile (109 KB)
        Lower Claiborne confining unit    Metadata (12 KB)    Shapefile (91 KB)
        Lower Claiborne aquifer    Metadata (12 KB)    Shapefile (87 KB)
        Middle Wilcox aquifer    Metadata (12 KB)    Shapefile (95 KB)
        Lower Wilcox aquifer    Metadata (12 KB)    Shapefile (71 KB)
        Midway confining unit    Metadata (12 KB)    Shapefile (98 KB)
  • Hydrologic Unit Surfaces:
        Vicksburg-Jackson Group (top)    Metadata (12 KB)    Raster (96 KB)    ASCII grid (80 KB)
        Upper Claiborne aquifer (top)    Metadata (12 KB)    Raster (200 KB)    ASCII grid (170 KB)
        Middle Claiborne confining unit (top)    Metadata (12 KB)    Raster (241 KB)    ASCII grid (200 KB)
        Middle Claiborne aquifer (top)    Metadata (12 KB)    Raster (300 KB)    ASCII grid (256 KB)
        Lower Claiborne confining unit (top)    Metadata (12 KB)    Raster (240 KB)    ASCII grid (203 KB)
        Lower Claiborne aquifer (top)    Metadata (12 KB)    Raster (249 KB)    ASCII grid (210 KB)
        Middle Wilcox aquifer (top)    Metadata (12 KB)    Raster (362 KB)    ASCII grid (305 KB)
        Lower Wilcox aquifer (top)    Metadata (12 KB)    Raster (151 KB)    ASCII grid (125 KB)
        Midway confining unit (top)    Metadata (12 KB)    Raster (371 KB)    ASCII grid (317 KB)
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    Page Last Modified: Tuesday, 03-Jan-2017 20:45:35 EST