K-Ar Age of Lava Dam in Grand Canyon

Research Article| January 01, 1968 K-Ar Age of Lava Dam in Grand Canyon EDWIN D McKEE; EDWIN D McKEE U. S. GEOLOGICAL SURVEY, DENVER, COLORADO (McKEE.) Search for other works by this author on: GSW Google Scholar W. KENNETH HAMBLIN; W. KENNETH HAMBLIN BRIGHAM YOUNG UNIVERSITY, PROVO, UTAH (HAMBLIN) Search for other works by this author on: GSW Google Scholar PAUL E DAMON PAUL E DAMON UNIVERSITY OF ARIZONA, TUCSON, ARIZONA (DAMON) Search for other works by this author on: GSW Google Scholar Author and Article Information EDWIN D McKEE U. S. GEOLOGICAL SURVEY, DENVER, COLORADO (McKEE.) W. KENNETH HAMBLIN BRIGHAM YOUNG UNIVERSITY, PROVO, UTAH (HAMBLIN) PAUL E DAMON UNIVERSITY OF ARIZONA, TUCSON, ARIZONA (DAMON) Publisher: Geological Society of America Received: 24 Oct 1966 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1968, 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 (1968) 79 (1): 133–136. https://doi.org/10.1130/0016-7606(1968)79[133:KAOLDI]2.0.CO;2 Article history Received: 24 Oct 1966 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 EDWIN D McKEE, W. KENNETH HAMBLIN, PAUL E DAMON; K-Ar Age of Lava Dam in Grand Canyon. GSA Bulletin 1968;; 79 (1): 133–136. doi: https://doi.org/10.1130/0016-7606(1968)79[133:KAOLDI]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 The K-Ar age of the basal basalt flow at the bottom of the “Lower Canyon group” of lavas near Toroweap fault is 1.16 ± 0.18 standard deviation (sd) m.y. This represents a minimum age of Grand Canyon, for at the time the lava formed, the canyon was essentially as deep as it is today. Since that time the Colorado River has cut through the 550-ft lava dam at the mouth of Toroweap Valley, an additional 50 ft of Paleozoic strata below, and through one or more younger lava dams in the area; downstream it has cut through 100 feet of younger intracanyon lavas. 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.