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DS926 Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system in Florida and parts of Georgia, Alabama, and South Carolina -- Limestone boundary for the APPZ (Reese and Richardson, 2008)

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 04:05 AM | Dataset Last Updated: November 17, 2020 at 12:00 AM
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 a line that shows the northern extent of predominantly limestone forming the APPZ. North of this line the APPZ is comprised mostly of highly permeable dolostone. South of this line the APPZ is comprised of lower-permeability limestone.

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