The Colorado Plateau is characterized by a thick sequence of mostly sedimentary rock layers that have been uplifted thousands of feet by plate tectonics movements. The uplift began about 70 million years ago, thus ending almost all sedimentary rock …
Glen Canyon’s Prominent Rock Units: The Aeolian Sandstones Plus One
Throughout the middle and downstream sections of Lake Powell about a dozen rock units can be seen. All are sedimentary in origin. Of these, only about four are exceptionally prominent, and three of them are Aeolian (wind-deposited) sandstones. The …
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