1989 Student Professional Paper: Graduate Division: Burial of Fault Scarps Along the Organ Mountains Fault, South-Central New Mexico

Research Article| February 01, 1990 1989 Student Professional Paper: Graduate Division: Burial of Fault Scarps Along the Organ Mountains Fault, South-Central New Mexico TERRI S. BEEHNER TERRI S. BEEHNER Search for other works by this author on: GSW Google Scholar Environmental & Engineering Geoscience (1990) xxvii (1): 1–9. https://doi.org/10.2113/gseegeosci.xxvii.1.1 Article history first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation TERRI S. BEEHNER; 1989 Student Professional Paper: Graduate Division: Burial of Fault Scarps Along the Organ Mountains Fault, South-Central New Mexico. Environmental & Engineering Geoscience 1990;; xxvii (1): 1–9. doi: https://doi.org/10.2113/gseegeosci.xxvii.1.1 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 Organ Mountains fault forms part of a 182 km (113 mi) normal fault system which borders the eastern edge of a linear, nearly continuous mountain range in the Rio Grande rift tectonic province in south-central New Mexico. Faulting has been repetitive since the Late Tertiary. The height of the Organ Mountains fault scarp varies from less than 1 m (3.3 ft) to about 36.6 m (120 ft). Along the Cox Ranch sector of the Organ Mountains fault the scarp height varies from less than 1 m (3.3 ft) to 9.1 m (30 ft). Recent studies have dated latest movement along the Cox Ranch sector of the Organ Mountains fault as having occurred between 1,000 yr and 5,000 yr BP. A scarp height of 4.6 m (15 ft) has been interpreted as the amount of displacement which occurred in the last event. A Maximum Credible Earthquake of Ms = 7.5 has therefore been calculated for the fault. The results of the present study of the Cox Ranch sector of the Organ Mountains fault scarp reveal that it has been extensively buried by debris flows and by fluvial materials deposited at the base of the scarp by intermittent streams. The 4.6 m height may not be the total amount of displacement which occurred in the last event, but is all that remains exposed of the buried scarp. Calculation of earthquake magnitude based on displacement values using topographic scarp heights alone may result in estimates that are incorrect. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.