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Sinkhole Zones
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 Region
of exposed or thinly-covered carbonate rocks. Broad, shallow
solution sinkholes dominate with less common collapse sinkholes
in areas with thicker overburden sediments.
 Region
of incohesive, permeable sand ranging from 100 to 200 feet
thick. Small cover subsidence sinkholes dominate with less-common
collapse sinkholes forming in areas clayey overburden sediments.
 Region
of cohesive, low-permeability clayey sediments 30 to 200 feet
thick. Abruptly-forming collapse sinkholes dominate. The size
of the sinkhole depends on the size and weight of the structures
and habitat on the overburden sediments.
 Regions
of deeply-buried carbonate rocks. Overburden sediments
primarily cohesive clayey sands and interbedded carbonates
in excess of 200 feet thick. Sinkholes are uncommon but rare
deep collapse sinkholes and small subsidence sinkholes
formed in shallow shell beds or carbonate lenses are
possible.
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What is a Sinkhole?
