SHARP CONTACT BETWEEN METAMORPHOSED CAMBRIAN CARBONATES AND THE NOTCH PEAK INTRUSION. IT IS NOT OFTEN THAT ONE CAN :PUT THEIR FINGER" ON SUCH A CONTACT
The House Range is one of those geological wonders found in the west desert of Utah and the Great Basin—it is a classic uplifted block of rocks, a horst, bounded by Tule and Sevier valleys, the grabens. The Range is north-south trending (~40 mi X 7 mi) and generally exposes lower Paleozoic (Cambrian and Ordovician) rocks. However, there is a major quartz monzonite (an igneous rock similar to granite but without the quartz) intrusive body of Jurassic age (Notch Peak Intrusion) called Sawtooth Mountain. This name comes from the weathering of the monzonite into sharp points and ridges as compared to the more rounded peaks in the limestones and shales.