Waterpocket Fold

fold, Utah, United States

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In Capitol Reef National Park: Natural history
…the nearly 100-mile- (160-km-) long Waterpocket Fold. That formation constitutes a monocline, a sharp fold of Earth’s crust that was formed when thick layers of horizontal sedimentary rocks (mainly sandstones but also shales, mudstones, and limestones) that had been deposited over a period of more than 200 million years were…
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