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The AAPG/Datapages Combined Publications Database
Grand Junction Geological Society
Abstract
Relocating Elmer Riggs’ Quarry No. 12
Abstract
Quarry No. 12 was the first site in the Grand Valley where Elmer S. Riggs of the Field Columbian Museum, Chicago, excavated dinosaur fossils in 1900–1901. At this quarry the remains of a plant–eating dinosaur, Camarasaurus, were recovered. The exact location was not recorded, but it was reported to be near the foot of Serpents Trail in the present–day Colorado National Monument. Personnel from the Museum of Western Colorado located the quarry site in 1988 some 1.5 mi northeast of the foot of Serpents Trail, on the south bank of No Thoroughfare Canyon. The location was confirmed using old photographs taken by the Riggs expedition.
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