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Unformatted text preview: up-Collapse in Florida occurred over several hours allowing the owner of the house to escape.-Winter Park, Fl- May 1981: during a period of record low water levels in Floridas limestone aquifer, a massive sinkhole opened up. In a single day the hole widened to 320 feet and to a depth of 90 feet, destroying and import car dealership, a public pool, and large portions of a road. Karst terrain is easily recognizable on topographic maps-Sinkholes have hatcher marks on the downhill side of the contour lines.-Karst terrain often has disappearing streams and big springs-Natural Bridge, Rockbridge, County, VA is the remains of a collapsed cave.-Advanced karsts are characterized by pinnacles.-Travertine, the doughnut hold of a karst ^travertine precipitates when groundwater that has dissolved limestone reappears on the surface and Degases carbon dioxide-Karst regions often have severe groundwater contamination ^An important source of contamination is disposal of wastes into sinkholes...
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- Fall '08