Research Article| April 01, 2006 The Poverty Hills, Owens Valley, California—Transpressional Uplift or Ancient Landslide Deposit? KIM M. BISHOP; KIM M. BISHOP 1Department of Geology, California State University, Los Angeles, 5151 State University Drive, Los Angeles, CA 90032 Search for other works by this author on: GSW Google Scholar STEVE CLEMENTS STEVE CLEMENTS 2SCS Engineers, 6601 Koll Center Parkway, Suite 140, Pleasanton, CA 64566 Search for other works by this author on: GSW Google Scholar Author and Article Information KIM M. BISHOP 1Department of Geology, California State University, Los Angeles, 5151 State University Drive, Los Angeles, CA 90032 STEVE CLEMENTS 2SCS Engineers, 6601 Koll Center Parkway, Suite 140, Pleasanton, CA 64566 Publisher: Association of Environmental & Engineering Geologists First Online: 09 Mar 2017 Online ISSN: 1558-9161 Print ISSN: 1078-7275 © 2006 Association of Engineering Geologists Environmental & Engineering Geoscience (2006) 12 (4): 301–314. https://doi.org/10.2113/gseegeosci.12.4.301 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation KIM M. BISHOP, STEVE CLEMENTS; The Poverty Hills, Owens Valley, California—Transpressional Uplift or Ancient Landslide Deposit?. Environmental & Engineering Geoscience 2006;; 12 (4): 301–314. doi: https://doi.org/10.2113/gseegeosci.12.4.301 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEnvironmental & Engineering Geoscience Search Advanced Search Abstract The Poverty Hills are a 5 km2, 300-m-high mass of plutonic and meta-sedimentary rocks exposed along the axis of the alluviated Owens Valley graben in eastern California. Two models have been proposed for the origin of the hills. One model suggests the hills represent a transpressional uplift along a 3-km left-step in the right-lateral Owens Valley fault zone, and the other proposes that the hills are a long-runout rock-avalanche deposit. This article argues that the rock-avalanche hypothesis best fits the geology. The transpressional model is problematic because the fault segment to which right-lateral displacement is purportedly transferred has been shown to have pure dip-slip displacement. The rock-avalanche model is based primarily on lithologic evidence. Throughout the hills are scattered outcrops displaying mosaic, jigsaw, and crackle breccia textures, all of which are characteristic of rock-avalanche deposits. Also, well-exposed roadcut outcrops display preserved source-rock bedding within the matrix-poor breccia framework. Though preserved, the bedding has been contorted and distorted by cataclastic flow of the breccia, another common characteristic of rock-avalanche deposits created during emplacement. The landslide is younger than 3 Ma, the age of inception of the Owens Valley graben, and older than 640 ± 50 ka, the age of a basalt flow that post-dates the landslide. An area in the Inyo Mountains southeast of the hills appears to be the most likely source. Interpretation of the Poverty Hills as a landslide mass suggests an alternative model for the Owens Valley fault-zone kinematics. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.