Interim Geologic Map of the Parowan Quadrangle, Iron County, Utah (OFR-764)

By: Tyler R. Knudsen

The Parowan 7.5' quadrangle is centered around the City of Parowan at the eastern margin of the Basin and Range Province in Iron County, southwestern Utah. The quadrangle covers part of the northwestern flank of the Markagunt Plateau and part of the adjacent Parowan Valley. The modern landscape is dominated by northeast-southwest-trending high-angle normal faults that form a series of horsts and grabens. The largest graben, Parowan Valley, is bounded by the Parowan fault on the southeast and is part of the transitional boundary between the Colorado Plateau to the east and the Basin and Range Province to the west. Along the base of the Hurricane Cliffs, Cretaceous through Eocene strata dip moderately to steeply northwest as part of the Cedar City-Parowan monocline. The Parowan fault and nearby intrabasin faults in Parowan Valley have locally displaced Late Pleistocene to Holocene alluvial-fan deposits, indicating that the faults should be considered hazardous.

Published: 2024
Pages: 21
Plates: 2