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Colorado River Raft Tour - preserved desiccation cracks

By Geology and Ecology of National Parks
This is a photo of desiccation cracks preserved in Precambrian-age sedimentary beds of the Galeros Formation.
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Detailed Description

~Mile 65.5: Desiccation cracks preserved in Precambrian-age sedimentary beds of the Galeros Formation in the Lava Creek drainage (about a half mile north of the Colorado River). Water bottle for scale is 10 inches (26 cm) tall.

Sources/Usage

Public Domain.