Crater Lake, Oregon: A restricted basin with base-of-slope aprons of nonchannelized turbidites

Abstract

Research Article| March 01, 1986 Crater Lake, Oregon: A restricted basin with base-of-slope aprons of nonchannelized turbidites C. Hans Nelson; C. Hans Nelson 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Audrey W. Meyer; Audrey W. Meyer 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Devin Thor; Devin Thor 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Matthew Larsen Matthew Larsen 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Geology (1986) 14 (3): 238–241. https://doi.org/10.1130/0091-7613(1986)14<238:CLOARB>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation C. Hans Nelson, Audrey W. Meyer, Devin Thor, Matthew Larsen; Crater Lake, Oregon: A restricted basin with base-of-slope aprons of nonchannelized turbidites. Geology 1986;; 14 (3): 238–241. doi: https://doi.org/10.1130/0091-7613(1986)14<238:CLOARB>2.0.CO;2 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 SocietyGeology Search Advanced Search Abstract The basin floor of Crater Lake (10-km diameter, 600-m water depth) is covered by up to 75 m of sediment–gravity-flow deposits interbedded with mud. In the upper units (8 m (thick), sand and gravel layers with numerous wedging, strong seismic reflectors characterize the base-of-slope aprons at the basin margin. These layers evolve to turbidites of mainly thin, fine-grained, basin-plain type, characterized by numerous flat and weak seismic reflectors in the central basin floor. Many individual debris-chute sources funnel sediment to base-of-slope aprons: there, coarse-grained parts of the sediment–gravity flows deposit nonchannelized beds attributed to the F, A, B turbidite facies. While traversing the base-of-slope aprons, flows evolve to sheet-flow turbidity currents that deposit D-facies beds over the central basin floor. These processes and patterns of deposition characterize small siliciclastic basins without channelized submarine fans and are common in carbonate basins of all sizes. 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.