The Uinta mountains form one of the most interesting and unique ranges in the Cordilleran system, in that they have a typical anticlinal structure with east-west axis and show no evidence of igneous action connected with their uplift.
In them are exposed, moreover, the only Paleozoic outcrops arising above the covering of Tertiary sediments in the upper part of the Colorado Plateau region, which thus furnish the sole connecting link between the Wasatch uplift on the west and that of the Rocky mountains on the east.
Topographically, they form a rather flat elliptical dome about 150 miles in length along their main axis and 20 to 25 miles in average width. The interior of the ellipse has a general level of about 10,000 feet, out of which rise sharp, narrow ridges and peaks of horizontally bedded quartzites to elevations of 12,000 and 13,000 feet. The . . .