The Ute quadrangle covers the central part of the California Wash basin and a small section of the westernmost North Muddy Mountains, where Paleozoic and Mesozoic rocks were highly deformed by the Sevier orogeny. Tertiary and Quaternary sedimentary rocks record the history of basin filling and dissection. Noteworthy on the quadrangle are several resistant Quaternary petrocalcic surfaces, with as much as Stage VI carbonate development, that form pediment caps on the Tertiary basin deposits. The map includes the northern part of the Holocene-active California Wash fault and the southernmost part of the Quaternary-active Hogan Spring fault. Original Product Code: M177a