A thin patina of algae streaks down the sandstone surface of Coyote Gulch, Grand Staircase-Escalante National Monument, Utah. March 2015.
A thin patina of algae streaks down the sandstone surface of Coyote Gulch, Grand Staircase-Escalante National Monument, Utah. March 2015.
Published October 15, 2015 at 1100 × 734 in Sandstone Patina
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