 Hugging the Shale...and Shade
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 Disconformity between massive Coconino Sandstone and thinner bedded Hermit Shale, Grand Canyon National Park, AZ
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 Sairocaris centurion, 145 mm. Heath Shale Formation. Bear Gulch Limestone. Bear Gulch, Fergus County, Montana, USA.
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 Turtle shale
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 Untitled 6.jpg
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