Geologic history of the Shinumo Quadrangle as shown by the lithologic record in the canyon wall. Grand Canyon National Park, Arizona. n.d.
Summary
Album caption: Geologic history of the Shinumo Quadrangle as shown by the lithologic record in the canyon wall. Grand Canyon National Park, Arizona. n.d. Index card: Unconformity in canyon wall.
Summary
Album caption: Geologic history of the Shinumo Quadrangle as shown by the lithologic record in the canyon wall. Grand Canyon National Park, Arizona. n.d.
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