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ROCK ABSTRACTS, SAN RAFAEL SWELL

The American Southwest contains a large number of rocks. Some of the best are in the San Rafael Swell near Hanksville, Utah. The Swell is a dome of sandstone, shale, and limestone created by a geologic upheaval in the distance past. Subsequent erosion by wind and rain has created a network of multi-colored narrows and slot canyons.

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