EarthWorks Geospatial Catalog

Potentiometric surface in the Sparta-Memphis Aquifer of the Mississippi Embayment, spring 2007 [cartographic material] / by T. P. Schrader ; U.S. Department of the Interior, U.S. Geological Survey.

Relief shown by contours and spot heights. "Prepared in cooperation with the U.S. Geological Survey Ground-Water Resources Program ... [et al.]." Includes location map and text.
U.S. Geological Survey ;
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