Devils Tower National Monument
By Geology and Ecology of National Parks
2003 (approx.)
Detailed Description
Snow blankets outcrops of red sediments of Permian to Jurassic strata exposed in bluffs along the Belle Fourche River in Devils Tower National Monument. These sedimentary formations dip gently to the west away from the Black Hills uplift (DeWitt and others, 1989; NPS, 2008).
Sources/Usage
Public Domain.