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Barger Gulch Site

There are few places in western North America richer in Paleo-Indian archaeology than Middle Park, the valley that forms the headwaters of the Colorado River in Grand County. Within Middle Park, the Barger Gulch area preserves an impressive amount of…

Colorado Geology

The Earth beneath the rugged mountains and serene plains of Colorado records an ancient saga. Broad tropical seas teemed with life, while reptiles roamed on shore. Continents converged and collided, building massive mountains, only to be torn apart by…

Precious Metal Mining in Colorado

From the 1850s to the 1920s, gold and silver mining drove Colorado’s economy, making it into an urbanized, industrial state. The rapid development of Colorado’s mineral resources had political, social, and environmental consequences. The mining of gold…

Sand Wash Basin Tool Stone Sites

Located northwest of Craig in Moffat County, the Sand Wash Basin is an area of Bridger Formation rock outcrops that prehistoric peoples mined extensively as a source for stones to make tools with. Bridger Formation chert is typically light to dark brown,…