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Geologic Trip, Sequoia NP Crystal Cave The entrance to Crystal
Cave is just above Cascade Creek, which lies at the lower left. The
cave is open to the public and is the most popular cave in Sequoia National
Park. The cave is in a bed of marble that forms a 700-foot wide ridge between nearby
Yucca Creek and
Cascade Creek. The cave was formed by water that flowed from Yucca Creek into
a pit in the floor of the creek. From the pit, the water flowed
through a series of sub-horizontal joints in the marble until it emerged on
the other side of the ridge and flowed into Cascade Creek. As the water
followed these joints, the weak acid in the water dissolved the marble along the joints to form the
cave. Exterior Websites National Park Service: Wikipedia:
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