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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 ...
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.
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.
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
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 ...
Karst is made up of soluble rock types like limestone, marble and gypsum, which can dissolve or collapse over time, creating sinkholes, sinking streams, caves, springs, and other characteristic ...
The Red Lake sinkhole in Croatia. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet.
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 ...