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Sinkholes occur naturally, and it is estimated that the majority of all lakes in Florida are a result of sinkhole activity. Sinkholes are common where the rock below the land surface is limestone and other carbonate rock, which can naturally be dissolved by water.
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www.sinkholes.net/new_page_5.htm
www.sinkholes.net/new_page_5.htm
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The most damage from sinkholes tends to occur in Florida, Texas, Alabama, Missouri, Kentucky, Tennessee, and Pennsylvania. The picture to the left shows a sinkhole that quickly opened up in Florida, apparently eating a swimming pool, some roadway, and buildings...
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ga.water.usgs.gov/edu/earthgwsinkholes.html
ga.water.usgs.gov/edu/earthgwsinkholes.html
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Karst, cover-collapse sinkholes, KGS, Kentucky Geological Survey ... Cover-collapse sinkholes occur in the soil or other loose material overlying soluble bedrock. A sinkhole is any naturally occurring depression in the surface of the ground from which rainfall is drained internally.
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www.uky.edu/KGS/water/general/karst/kgeohazard.html
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If a relatively thick layer of impermeable sediments covers the limestone there may not be a surface expression of a subsurface collapse Cover-collapse sinkholes occur where sediments that overlie the void in the rock suddenly collapse due to triggering mechanisms such as heavy rainfall, drought, or mechanical loading.
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www.dep.state.fl.us/geology/feedback/faq.htm
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Sinkholes are a common feature of Florida's landscape. They are only one of many kinds of karst landforms, which include caves, disappearing streams, springs, and underground drainage systems, all of which occur in Florida. ... Sinkholes can occur in the beds of streams,
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www.dep.state.fl.us/geology/geologictopics/sinkhole.htm
www.dep.state.fl.us/geology/geologictopics/sinkhole.htm
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Sinkholes are a common naturally occurring geologic phenomenon and one of the predominant land forms in Florida. Many of the lakes in Florida are relic sinkholes. They are typically circular but can develop in other shapes depending on the soils and geology. ... Where do sinkholes occur? Sinkholes can occur in all parts of...
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www.lakecountyfl.gov/departments/environmental_utilitie...
www.lakecountyfl.gov/departments/environmental_utilities/water_quality_services/sinkhole.aspx
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How sinkholes form. What is a sinkhole? Sinkholes are part of the slow, natural process of erosion in Florida's limestone terrain that occur over thousands ...
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sjr.state.fl.us/publications/pdfs/fs_sinkhole.pdf
sjr.state.fl.us/publications/pdfs/fs_sinkhole.pdf
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Sinkholes are a common, naturally occurring geologic feature and one of the predominant landforms in Florida, where they pose hazards to property and the environment. Although many new sinkholes develop naturally, in west-central Florida and elsewhere, their increasing frequency corresponds to the accelerated...
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www.sinkhole.org/facts.htm
www.sinkhole.org/facts.htm
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Such a limestone terrain in southeast Minnesota is pocked with large and small closed depressions called sinkholes. Most sinkholes form when soil is transported through solution channels in limestone. However, some form when the ... When sinkholes occur they cause damage to houses, foundations, roads and farmers fields.
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www.soils.umn.edu/academics/classes/soil2125/doc/1-snkl...
www.soils.umn.edu/academics/classes/soil2125/doc/1-snkle.htm
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