NABSQNO 12T-675515-4485700An unnamed alcove natural arch, Moffat County, Colorado Photo by Scott Patterson NABSQNO 12T-675515-4485700. This unnamed alcove natural arch eroded has through Weber sandstone. It is located above a short side tributary of the Yampa River in Dinosaur National Monument, Moffat County, Colorado. It has a span of about 45 feet.
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