Contact: Lee Siegel
University of Utah
Caption: University of Utah geologist Winston Seiler walks among hundreds of dinosaur footprints in a "trample surface" that likely was a watering hole amid desert sand dunes during the Jurassic Period 190 million years ago. The track site, which also includes some dinosaur tail-drag marks, is located in Coyote Buttes North area along the Arizona-Utah border.
Credit: Roger Seiler
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