Rainbow Bridge National Monument
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-Rainbow Bridge National Monument
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Formation of Arches at Arches Natl Park
Entrada sandstone, especially susceptible to exfoliation, is exposed to the elements. Eventually the rock is breached, causing the formation of windows, which are gradually enlarged to form the arches, which themselves eventually collapse.
Carlsbad Caverns' most famous cave is over 1,000 feet deep and currently contains 30 miles of mapped passages. The Big Room of Carlsbad Cavern is the largest underground chamber in the United States. View formations of stalagmites, stalactites, and columns in this video. You will also see the evening flight of Mexican free-tailed bats from the entrance of the Cavern.
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