The ignimbrite source problem: Significance of a co-ignimbrite lag-fall deposit

Abstract

Research Article| December 01, 1977 The ignimbrite source problem: Significance of a co-ignimbrite lag-fall deposit John V. Wright; John V. Wright 1Geology Department, Imperial College, London SW7, England Search for other works by this author on: GSW Google Scholar George P. L. Walker George P. L. Walker 1Geology Department, Imperial College, London SW7, England Search for other works by this author on: GSW Google Scholar Author and Article Information John V. Wright 1Geology Department, Imperial College, London SW7, England George P. L. Walker 1Geology Department, Imperial College, London SW7, England Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1977) 5 (12): 729–732. https://doi.org/10.1130/0091-7613(1977)5<729:TISPSO>2.0.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation John V. Wright, George P. L. Walker; The ignimbrite source problem: Significance of a co-ignimbrite lag-fall deposit. Geology 1977;; 5 (12): 729–732. doi: https://doi.org/10.1130/0091-7613(1977)5<729:TISPSO>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 A co-ignimbrite lag-fall deposit is one that forms at or near the site of eruptive column collapse and consists mainly of pyroclasts that are too large and too heavy to be carried away in the resulting pumice flows. An example from Mexico is identified as such because it shows the same compositional zoning from rhyolite to andesite as the associated ignimbrite. It indicates that the ignimbrite originated by continuous collapse of the eruptive column and locates the ignimbrite source vent. In this example the vent is located on flat ground, apparently unrelated to any pre-existing volcano, and the ability of the ignimbrite to travel laterally some 20 km must be due to eruptive column height rather than ground slope. 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.