Colorado Plateau 2005

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The last few miles of the trail ascend steep cliffs of the cross-bedded Permian Cocinino sandstone (275 Ma, at center) and the overlying Toroweap Formation, before topping out on the Kaibab limestone (270 Ma, lower right) at the rim.

All images copyright © 2016 F.W. Vollmer and may not be used without permission.