16 Porosity and Sinkholes 4

16 Porosity and Sinkholes 4 - Thin, sandy covering Thick...

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Sinkhole formation depends on the material and the thickness of the material overlying the carbonate water-bearing unit The Miocene clayey siliciclastic sediments have undergone significant erosion and shaping during and since their deposition. This is due mainly to changes in sea level over millions of years Sediment thickness varies considerably from region to region within the state, ranging from 0 to 500 ft thick, depending on location
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Clays Sands What is a sinkhole? Limestone The type of sinkhole depends on the type and thickness of the material overlying limestone
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Sinkhole formation depends on the material overlying the carbonate water-bearing unit
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Unformatted text preview: Thin, sandy covering Thick sands up to 200 ft thick and some clays Cohesive clays up to 200ft thick Very thick clays > 200ft. Miocene clays have been eroded and shaped throughout their history resulting in extreme variability in thickness across the state. Dissolution chemical erosion of limestone at the surface. Cover Subsidence gradual infill of overburden into a solution cavity. Cover Collapse abrupt collapse of overburden Sinkhole Types Dissolution Sinkhole Thin Sand Carbonates Overlying material is thin and sandy...
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16 Porosity and Sinkholes 4 - Thin, sandy covering Thick...

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