The Castle is a rock formation of Wingate Sandstone, west of Fruita, in Capitol Reef National Park, Utah, USA. Wingate Sandstone rests upon the sloping, many-hued Triassic Chinle Formation, a former soil layer rich in clay derived from volcanic ash. The bottom of the slope is Moenkopi Formation, a dark brick-red mudstone and siltstone which surfaces most of the park west of the reef.
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