Model for Deposition of Volcanic Ash and Resulting Bentonite

Abstract

Research Article| March 01, 1970 Model for Deposition of Volcanic Ash and Resulting Bentonite M SLAUGHTER; M SLAUGHTER Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401 Search for other works by this author on: GSW Google Scholar M HAMIL M HAMIL Department of Geology, University of Missouri, Columbia, Missouri 65201 Search for other works by this author on: GSW Google Scholar Author and Article Information M SLAUGHTER Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401 M HAMIL Department of Geology, University of Missouri, Columbia, Missouri 65201 Publisher: Geological Society of America Received: 10 Nov 1969 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1970, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1970) 81 (3): 961–968. https://doi.org/10.1130/0016-7606(1970)81[961:MFDOVA]2.0.CO;2 Article history Received: 10 Nov 1969 First Online: 02 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 M SLAUGHTER, M HAMIL; Model for Deposition of Volcanic Ash and Resulting Bentonite. GSA Bulletin 1970;; 81 (3): 961–968. doi: https://doi.org/10.1130/0016-7606(1970)81[961:MFDOVA]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 SocietyGSA Bulletin Search Advanced Search Abstract A “mushroom cloud” model describes the depositional features of volcanic ash (and resultant bentonite beds) from highly explosive volcanoes. The model is represented as an expanding disk-shaped cloud from which deposition occurs. The model contains an original particle-sized distribution, allows areal expansion of the distribution in a turbulent atmosphere, and aggregation of particles due to water and static electricity in the volcanic cloud. Evaluation of the model yields elongate tongue-like deposits whose lateral and downwind spread is a function mainly of wind velocity and cloud height, but its dimensions are affected significantly by particle aggregation. Histograms of particle sizes from several positions on an ash bed show change of modal sizes and skewness in hypothetical ash beds. The hypothetical distributions show close affinities to particle sizes in real ash beds. 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.