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Bluff Dweller's Cave
Bluff Dweller's Cave is a show cave located in Noel, Missouri. It was developed by channels of water flowing through joints in the St. Joe Limestone during the Paleozoic Era.〔(Show Caves of the United States of America: Bluff Dweller's Cave and Browning Museum )〕 The cave's passages total over 4,000 ft in length, with one entrance beneath a limestone outcropping of the bluff and a second entrance later discovered about 60 yards away under the rubble from a landslide.
==Description==
The cave was formed during an active period, when the ground water table was at the height of the cave, and great amounts of water flew through the cave. The impressive river passages of the cave were formed. The Ozark uplift continued and so the cave became dry. The formation of speleothems started, and the cave was accessible to prehistoric man. Later, continuing erosion by tremors and weathering, caused the collapse of the entrance section.〔
Only 50% of the cave is developed, the remaining areas preserved for wildlife. The cave has several recognized speleothems, like cave corals and the dam in a rimstone pool which is 2.5 cm thick, 30 cm high and 22.8 meters long, one of the largest in the state.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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