Interim Geologic Map of the Lyman Quadrangle, Wayne County, Utah (OFR-668)

By: Robert F. Biek, Hanna Bartram, Zachariah Fleming, Erika Wenrich, Christopher Bailey, and Peter Steele

The Lyman quadrangle lies astride the Thousand Lake fault zone in south-central Utah and includes the small towns of Lyman and Fremont in Rabbit Valley. Rabbit Valley, on the down-dropped side of the fault, contains an enormous landslide complex, about 25 mi2 (65 km2) in size, shed off the west flank of Thousand Lake Mountain. The landslide is several hundred feet thick and traveled 4 miles (6.5 km) across the valley floor; it may be as young as about 500,000 years old. Younger landslides, parts of which are historically active, mantle the slopes of the mountain. This new geologic map continues our effort to map the western half of the Loa 30' x 60' quadrangle.

Other Information:
Published: 2017
Pages: 15
Plates: 2
Scale: 1:24,000
Location: Utah
Media Type: Paper Publication