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Arch Rock Nature Trail Professional Review and Guide
"Arches and natural bridges are formed when more rapid erosion takes place on the lower parts on a rock. These formations are common in sandstone but rare in granite. Arch Rock is one of these unusual granite arches. A short nature trail explains the arch and many of the park’s other prominent geological features. Arch Rock is located halfway along the loop trail."
--David & Jennifer Money Harris, Afoot and Afield: Inland Empire (Wilderness Press).
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