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Coconino Sandstone. A small four-legged animal walked across a sand dune 265 million years ago, leaving behind its foot- and claw-prints. Before the tracks were erased, another sand layer covered and preserved them.

Group: Sedimentary
Image Number: 97-36386
Catalog Number: 11148
Time Period: Permian Period
On loan from Department of Paleobiology
Locality: Grand Canyon , Arizona


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Smithsonian National Museum of Natural History Department of Mineral Sciences website Credits