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Gypsum Dunes At Salt Basin, Guadalupe Mountains National Park

A cloudy, pre-sunrise view of white sand dunes with mountains in the background, Guadalupe Mountains National Park
NS/Giraffeascope
Thursday, June 26, 2025

Salt Basin is the name of the graben, or a down-dropped block of the earth’s crustal rocks created when faulting caused this downward movement some 26 million years ago, at about the same time Guadalupe Peak was uplifted more than two miles to its present position. The water that was present at the time evaporated, leaving gypsum and salt deposits at Salt Basin.

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