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Title
Devils Tower National Monument Close Up- Wyoming #92973565
Description
Head on view of the astounding geologic feature that protrudes out of the rolling prairie surrounding the Black Hills, this site is considered sacred to the Northern Plains Indians and other tribes. Hundreds of parallel cracks make it one of the finest traditional crack climbing areas in North America. The igneous material that forms the Tower is a phonolite porphyry intruded about 40.5 million ye