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Variation of weathering on rock surface

By Alaska Science Center
Light yellow and gray outcrop with orange and black hammer in middle for size comparison. Ridge, blue sky and clouds in back.
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Detailed Description

Variation of weathering and lichen growth on the rock surface reveals veins and segregated zones with different mineralogy. 

Sources/Usage

Public Domain.

Photo taken by Erin Tood, U.S. Geological Survey