Alighting from the train at Sevier station on the R. G. W. R. E., the observant traveler to Gold Mountain will notice that the rugged and broken foothills are composed of basaltic material. As one proceeds westward and enters Clear Creek canyon, he will note the fact that- the gorge has been ploughed deep in a bed of basalt, which, as Robinson s ranch is approached, becomes more columnar in its' structure. The bed .extends westerly from Sevier station a distance of some fourteen miles, where .rhyolite becomes the