https://en.wikipedia.org/wiki/Sinkhole - 17 hours ago
A sinkhole, also known as a cenote, sink, sink-hole, shakehole, swallet, swallow
hole, or doline is a depression or hole in the ground caused by some form of ...
Sinkholes are common where the rock below the land surface is limestone,
carbonate rock, salt beds, or rocks that can naturally be dissolved by
May 19, 2015 ... World's BIGGEST (and sometimes WEIRDEST) HOLES on Earth! (Including the
biggest sinkhole on earth; the largest open pit mine in the world ...
The sudden nightmare of sinkholes swallows cars and homes and can cause the
loss of life. The phenomena occurs due to erosion beneath the surface, ...
Scores of residents in Polk County, Florida have requested water quality testing
after a fertilizer plant admitted a sinkhole on its property leached 215 million ...
http://abcnews.go.com/International/photos/incredible-si... - 9 hours ago
Slideshow of incredible sinkholes around the world.
Sinkholes are much more than holes in the ground. Learn how sinkholes can
cause the Earth to swallow up you, your home and your car.
Sinkholes are depressions or holes in the land surface that occur throughout
west-central Florida. They can be shallow or deep, small or large, but all are a ...
Jul 12, 2013 ... Sinkholes can be anywhere from a few feet wide and deep, to two thousand feet
in diameter and depth. An undiscovered cavern or deep mine ...
Aug 2, 2016 ... Mayor Paul Pisasale of Ipswich said an old mine shaft is the suspected cause of
a sinkhole that swallowed part of a backyard on Tuesday, and ...