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The Great Blue Hole, a giant submarine sinkhole, near Ambergris Caye, Belize The following is a list of sinkholes , blue holes , dolines , crown holes , cenotes , and pit caves . A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer.
AOL
Bluespring Caverns is a cave system located in Lawrence County, Indiana, approximately 80 miles (128 km) south of Indianapolis. The cave system is a karst and river type cave formation and drains a 15 miles² (38.8 km 2 ) sinkhole plain.
The Pipe Creek Sinkhole preserves an ancient wetland.It was created by the collapse of a limestone cave in a Silurian reef formation. That left a steep-sided depression about 75 meters (246 ft) long, 50 meters (164 ft) wide and 11 meters (36 ft) deep.
Three counties in Florida's Tampa area make up a region sometimes called "sinkhole alley" because of the over 20,000 sinkholes there, almost 75% of the sinkholes in the whole state, according to ...
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Squire would come back later to purchase the land and live near the caves in 1808 and start a grist mill at the site. The mill is on the Indiana Register of Historic Sites and Structures and still operates today. [1] Squire Boone died in 1815 and, having so loved the caverns, requested to be buried in them, and was buried near the entrance to ...