Stop 7: Calcite Sand Crystals

A finger points to crystal fins of calcite.
"Sand" crystals were formed when calcite replaced gypsum.

NPS/Eric Grunwald

Quick Facts
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Scenic View/Photo Spot

Between the second and third switchbacks on the northeast side of Scotts Bluff, look for sand crystals in the horizontally stratified sandstone of the Gering Formation. The disk-like shape of the crystals indicates to geologists that they were formed by the growth of gypsum which has since been replaced with calcite. 

To get to the next stop on the tour, head down the trail until about 65 feet before the foot tunnel. 

Scotts Bluff National Monument

Last updated: December 15, 2020