Master of Science (MS)
Catherine M. Snelson, Chair
First Committee Member
Wanda J. Taylor
Second Committee Member
Eugene I. Smith
Third Committee Member
Michael G. Pravica
The Black Hills fault (BHF) is a SE-dipping normal fault forming the northwestern structural boundary of the Eldorado basin, ∼20 km southeast of Las Vegas, Nevada (Langenheim and Schmidt, 1996). The fault offsets Holocene strata and is thus considered to be active (Fossett, 2005). Therefore, the BHF poses a significant seismic hazard to the greater Las Vegas area.
Fossett (2005) estimated that the BHF is capable of producing a M W 6.4 to 6.8 earthquake. However, this suggests a subsurface rupture length greater than the scarp length (Fossett, 2005). To test this hypothesis, remote sensing, geologic mapping, and high-resolution seismic reflection survey were utilized. The result is an interpretive geologic cross-section showing several SE-dipping normal faults on strike with the BHF. This implies that the BHF may be >6 km in length. In addition, several models are proposed to explain the anomalous orientation of the BHF relative to other normal faults in the area.
Faults (Geology); Nevada – Black Hills fault; Nevada – Las Vegas Valley
Geology | Geophysics and Seismology | Tectonics and Structure
Zaragoza, Shelley A., "Imaging the southern trace of the Black Hills fault, Clark County, Nevada" (2008). UNLV Theses, Dissertations, Professional Papers, and Capstones. 1452.