This part of the House Range is chiefly made up of a passive margin sequence of Cambrian to Ordovician carbonate rocks. The top of the range is the type section for the aptly named Notch Peak Dolomite. At the base of the range is the pink/orange Notch Peak granite and monzonite, which is Jurassic in age (143 to 169 million years old). Around Notch Peak, especially from the west side (Tule Valley side), white Lake Bonneville fossiliferous marls occur.