Karst and the Hydrogeology of the Flordian Aquifer, Florida, USA推荐.pdf

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Karst and the Hydrogeology of the Flordian Aquifer, Florida, USA推荐.pdf

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Karst and the Hydrogeology of the Flordian Aquifer, Florida, USA推荐

Karst and the Hydrogeology of the Flordian Aquifer, Florida, USA (Tihansky and Knochenmus,2000, p 199) Presented 14. January 2005 by Laura Torres Coral and Ann Whealan Geographic Location Maps from:/cia/publications/factbook/reference_maps/north_america.html and /florida/maps/1900/poat21.htm Karst Features and Topography • Karst = “bleak, waterless place” (/Karren.html ) • Solution is active mechanism in karst genesis • General lowering of landscape (Lane, 1986) A kind of “erosion from below” • Prerequisites for karstification / speleogenesis Suitable geological material • Soluble rock – Gypsum Images from (Hyatt, 2004) – Limestone/Dolomite – Halite • Relatively low initial permeability • Existence of fracturing/faulting Called “sink holes” in the US Infiltration • Aquifer access (fractures extend to surface) Karrens – surface solution depressions, where Limestone exposed Pinnacles Terra rosa and lapies Images from: (3) Indiana Karst Conservancy, and (1) The Geological Survey of Ireland Florida’s Geological History All exposed rocks in FL are sedimentary (no metamorphic or igneous) •Mesozoic tectonic.mov (Accessed at http://www.dep.state.fl.us/ge