Welded Tuffs of Chiricahua National Monument, Arizona

Research Article| October 01, 1955 WELDED TUFFS OF CHIRICAHUA NATIONAL MONUMENT, ARIZONA HAROLD E ENLOWS HAROLD E ENLOWS DEPARTMENT OF GEOLOGY, UNIVERSITY OF TULSA, TULSA 4, OKLA. Search for other works by this author on: GSW Google Scholar Author and Article Information HAROLD E ENLOWS DEPARTMENT OF GEOLOGY, UNIVERSITY OF TULSA, TULSA 4, OKLA. Publisher: Geological Society of America Received: 08 Jun 1954 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1955, 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 (1955) 66 (10): 1215–1246. https://doi.org/10.1130/0016-7606(1955)66[1215:WTOCNM]2.0.CO;2 Article history Received: 08 Jun 1954 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation HAROLD E ENLOWS; WELDED TUFFS OF CHIRICAHUA NATIONAL MONUMENT, ARIZONA. GSA Bulletin 1955;; 66 (10): 1215–1246. doi: https://doi.org/10.1130/0016-7606(1955)66[1215:WTOCNM]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 Chiricahua National Monument, Arizona, and much of the western part of the Chiricahua Mountains contain extensive bedded rhyolite deposits of Cenozoic age heretofore termed flows. Most of these volcanic rocks, however, are more correctly classified as welded rhyolite tuff or ignimbrite, the result of many eruptions of nuées ardentes. These deposits are characterized by vertical gradation from a coherent, nonporous base exhibiting prominent eutaxitic structure to a less coherent, porous top. By following vertical joints of tectonic origin and the eutaxitic structure developed by flattening and aligning of blocks of pumice in the deposit, weathering has developed spectacular columns and balanced rocks.Study of the petrography, structure, conditions of deposition, and origin of this unusually thick section of rock permits an evaluation of features which have been termed characteristic of welded tuffs, and facilitates identification of this important rock type. 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.