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Karst and the USGS

Welcome to the USGS Karst Website. This website presents information on USGS research on karst aquifers, which are a vital groundwater resource in the United States. Here you can learn about past and current USGS karst research, with information on ongoing studies, publications, and key contacts for major karst areas. Click on an aquifer on the map below, or select one from a list of aquifers.

Sinkhole-formed lakes near Winter Haven, FL Sinkhole-formed lakes near Winter Haven, FL. These sinkholes, which often are filled with permeable surficial sands, provide more direct avenues for water from the surficial aquifer system to recharge the underlying Upper Floridan aquifer. (from Spechler and Kroening, 2006) Read more about the Upper Floridan and Biscayne aquifers...
A "blue-hole" spring, Orangeville Rise, Indiana A "blue-hole" spring, Orangeville Rise, Indiana. Sixty feet in diameter. (Photo by Chuck Taylor) Read more about Paleozoic karst aquifers of the Midwest...
Dye injected into a stream enters a swallow hole in the Madison Limestone Dye injected into a stream enters a swallow hole in the Madison Limestone. The fluorescein dye from this injection was detected in five wells located as much as 2 miles northeast of the injection site. Read more about the Madison aquifer...
Endangered Barton Springs Salamander Endangered Barton Springs Salamander. The Barton Springs Salamander, Eurycea sosorum, is a federally listed endangered species. It has been found only in and around the major springs of the Barton Springs segment of the Edwards aquifer. (Photo courtesy of Lisa O'Donnell, City of Austin) Read more about the Edwards Balcones Fault Zone aquifer...
Main Barton Spring, with Barton Springs Pool drained Main Barton Spring, with Barton Springs Pool drained. USGS Research Hydrologist Barbara Mahler makes water-quality measurements of Main Barton Spring. The spring normally discharges under the presssure of 12 feet of overlying water, but here that water had been lowered temporarily, to quantify the water-quality changes it causes. (Photo by Marcus Gary) Read more about the Edwards Balcones Fault Zone aquifer...

This website allows you to browse for karst reports and articles authored by USGS researchers, and find links for other karst resources. There is also an overview of karst and its properties.

This website is maintained by members of the USGS Karst Interest Group, whose (KIG), who investigate karst across the United States.

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Page Last Modified: Monday, 30-Jan-2012 16:39:46 EST