Among these multi-hued mesas and canyons, evidence of humanity dates back more than 8,000 years. Exposed layers of sedimentary rock on the east side of the park also reveal far deeper stages of geologic time.
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This is from a set of 'Scenic American Landscapes" stamped postcards from the United States Postal Service (USPS).
the back reads:
Share the pristine beauty of America's national parks with this set of 20 stamped cards. Ten different designs showcase spectacular photographs originally featured on 'Scenic American Landscapes' stamps. Postage included, so mailing is easy - or save them as a unique collectible set.
2010
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