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Bering Sinkhole – natural limestone sinkhole in Texas used for prehistoric burials [4] Big Basin Prairie Preserve – St. Jacob's Well, Kansas, a water-filled sinkhole which lies in the Little Basin, and the Big Basin, a 1.5-kilometre-wide (1 mi) crater-like depression; Blue Hole (Castalia) – a fresh water pond located in Castalia, Erie ...
Dunbar Cave State Park is a 110 acre (450,000 m²) [1] protected area in Clarksville, Tennessee. Dunbar Cave is the 280th largest known cave complex in the world, stretching 8.067 miles (13 km) inward. The cave is located in an area of karst topography, including sinkholes, springs, and limestone bedrock.
The Douglas Lake Member is composed of a diverse set of sedimentary rocks, including rubble conglomerate, chert conglomerate, and black dolomite.In outcrops along the north shore of Lake Douglas, the chert conglomerate overlies the rubble conglomerate and both of which fill prehistoric sinkholes, called paleokarst, developed in upper surface of the Mascot Dolomite.
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 ...
An elevation map of Grassy Cove in Cumberland County, Tennessee. Grassy Cove is North America's largest sinkhole. Sinkhole dimensions: [6] Watershed Area: 33.1770 km 2 (12.8097 sq mi) Watershed Perimeter: 42.1524 km (26.1923 mi) Sinkhole Area: 13.3112 km 2 (5.1395 sq mi) Sinkhole Perimeter: 35.7192 km (22.1949 mi) Sinkhole Depth: 39.97 m (131.1 ft)
Dye traces establish the origin of their water as originating from Grassy Cove, [5] the pastoral limestone sinkhole located to the north-east. The Sequatchie River follows the general trend of the Sequatchie Valley, flowing south-west for 182.12 mi (293.09 km). [6] Sequatchie River in Pikeville, Tennessee
A sinkhole is a hole or deep depression in the ground that opens up when layers of certain types of rock – usually limestone, carbonate rock and salt beds – dissolve beneath the surface and ...
The geology of Tennessee is as diverse as its landscapes. Politically, Tennessee is broken up into three Grand Divisions : East , Middle , and West Tennessee . [ 1 ] Physically, Tennessee is also separated into three main types of landforms: river valley plain, highlands and basins, and mountains.