The San Rafael Swell (Images of America) Uinta Mountains and processes

and processes

southeast-dipping Jurassic and Triassic strata (Thaynes Limestone

and tourists alike

Bedrock strata exposed within the quadrangle are from Middle Jurassic (Callovian) through late Eocene in age

The San Rafael Swell (Images of America) Uinta Mountains and processesThe San Rafael Swell is an anticline, or a geological uplift, that originally looked like an oval bowl turned upside down. Over time it has been carved into castle like formations and deep canyons by erosive conditions. This landscape seemed so formidable to early cartographers that it was the last area in the continental United States to be mapped. The San Rafael Swell itself has no permanent human inhabitants, but small towns are scattered along its