Karst landscapes develop naturally through the weathering process so a sinkhole can be considered a natural occurence. But, human influence causes sinkholes to occur where they might not naturally have happened. Or, they may occur sooner or more abruptly than under natural conditions.
www.depweb.state.pa.us/sinkholes/cwp/view.asp?a=3&Q=503... www.depweb.state.pa.us/sinkholes/cwp/view.asp?a=3&Q=503856
Sinkholes are natural geolic feature due to underground soluable rocks. ... As the rock dissolves, spaces and caverns develop underground. Sinkholes can go undetected for long periods of time because the surface land usually stays intact until while the underground spaces and caverns develop.
www.trinitylawyer.com/what-are-sinkholes.html www.trinitylawyer.com/what-are-sinkholes.html
What causes a sink hole? - ... A space or void can develop under the ground. sinkholes are created when surface materials dissolves into earth and can no longer support the earth. The surface will then collapse. A karst sinkhole may develop slowly into a circular shaped hole in the ground, or it could just collapse suddenly.
www.tampalots.com/florida-sinkhole.htm www.tampalots.com/florida-sinkhole.htm
Will watering our lawn lower the water table level and thus, cause sinkholes to develop in our neighborhood? ... Property insurance may pay for testing, but in many cases insurance may not cover damage from settling due to causes other than sinkholes.
www.dep.state.fl.us/geology/feedback/faq.htm
The water causes voids to develop in pre-existing openings in the ground, such as, along joints, fractures, and bedding planes causing a small depression to form gradually over time. This downward erosion flows into a pre ... Cover-Collapse sinkholes develop quickly over a period of hours and can cause major damage.
www.championfoundation.com/types.asp
Sinkholes can cause damage to homes, businesses, and roads in hours, yet they are virtually ... From there, four main types of sinkholes develop: solution, ...
www.nd.edu/~techrev/Archive/Spring2000/a2.html
He jumped out of the car and as he called a tow company, he began to watch a sink hole develop around his car that grew in excess of 30x20 feet.
grandrapids.injuryboard.com/property-owners-liability-s... grandrapids.injuryboard.com/property-owners-liability-slip-and-fall/grand-rapids-sink-hole-causes-fingers-to-point.aspx?googleid=255460
What is a sinkhole?, from the USGS Water Science for Schools site. ... Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved by ground water circulating through them. As the rock dissolves, spaces and caverns develop underground.
ga.water.usgs.gov/edu/earthgwsinkholes.html ga.water.usgs.gov/edu/earthgwsinkholes.html
Sinkholes are a common, naturally occurring geologic feature and one of the predominant landforms in Florida, Although many new sinkholes develop naturally, in west-central Florida and elsewhere, their increasing frequency corresponds to the accelerated development of ground-water and land resources.
www.sinkhole.org/facts.htm www.sinkhole.org/facts.htm
A Bryant; Watershed Atlas; Interactive ; Presentation ... Part One: A Doline Sinkhole ... An Interactive Presentation by Mark Giles; © 2001;
www.watersheds.org/earth/Sinkholes.html www.watersheds.org/earth/Sinkholes.html