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Colorado River Raft Tour - still water on the Colorado River

Detailed Description

~ Mile 1: Still water on the Colorado River below Lees Ferry entering Marble Canyon. The Permian Kaibab Formation in the canyon walls is a marine sedimentary deposit that contains more sandstone at the eastern end of the Grand Canyon than at the west end where it is a cleaner limestone (Hopkins, 1990).

Sources/Usage

Public Domain.