As one descends the Bright Angel Trail in Grand Canyon, the disconformity separating the younger Coconino Sandstone from the older Hermit Formation is encountered. The reddish color of the Hermit is an iron oxide stain. Both sedimentary rock unit were deposited during the Permian, about 280 million years ago.
Photographer: Dale Nations
Photo Date: circa 2000
Photo Location Accuracy: Approximately Located
Photo Tags: Permian, Paleozoic, Grand Canyon, Coconino Sandstone, Hermit Formation, erg 
