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The system has been explored and mapped by cave divers of the Jacob's Well Exploration Project and has been shown to consist of two principal conduits. One passageway measures approximately 4,500 feet (1,400 m) from the surface with a maximum depth of 137 feet (42 m), and a secondary one extends approximately 1,000 feet (300 m) in length from the point where it diverges from the main conduit.
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Entrance to the underground river at Puerto Princesa Subterranean River National Park. ... Jacobs Cavern, Missouri; Jacob's Well, Texas; Jewel Cave, South Dakota;
The floor of Little Basin, close to the foot of its encircling bluff, shows a number of shallow depressions, apparently the nearly healed scars of other and earlier sink holes. St. Jacob's Well has every appearance of having been rather recently formed. [6] Research has determined that St Jacob's Well is 84 ft (26 m) wide and 58 ft (18 m) deep.
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The Red Beds of Texas and Oklahoma are a group of Early Permian-age geologic strata in the southwestern United States cropping out in north-central Texas and south-central Oklahoma. They comprise several stratigraphic groups , including the Clear Fork Group , the Wichita Group , and the Pease River Group . [ 1 ]