Zeolitic Weathering in Olduvai Gorge, Tanganyika

Research Article| October 01, 1963 ZEOLITIC WEATHERING IN OLDUVAI GORGE, TANGANYIKA RICHARD L HAY RICHARD L HAY DEPT. GEOLOGY AND GEOPHYSICS, UNIVERSITY OF CALIFORNIA, BERKELEY, CALIF. Search for other works by this author on: GSW Google Scholar Author and Article Information RICHARD L HAY DEPT. GEOLOGY AND GEOPHYSICS, UNIVERSITY OF CALIFORNIA, BERKELEY, CALIF. Publisher: Geological Society of America Received: 02 May 1963 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1963, 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 (1963) 74 (10): 1281–1286. https://doi.org/10.1130/0016-7606(1963)74[1281:ZWIOGT]2.0.CO;2 Article history Received: 02 May 1963 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 RICHARD L HAY; ZEOLITIC WEATHERING IN OLDUVAI GORGE, TANGANYIKA. GSA Bulletin 1963;; 74 (10): 1281–1286. doi: https://doi.org/10.1130/0016-7606(1963)74[1281:ZWIOGT]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 Zeolites and dawsonite have formed rapidly during the past 20,000 years in the sides of Olduvai Gorge and over the adjacent Serengeti Plain of northeast Tanganyika. Nephelinite tuffs were altered to form a surface calcrete and the minerals phillipsite, natrolite, chabazite, analcime, and dawsonite; sodic trachyte tuffs were altered to form phillipsite, erionite, and chabazite. Zeolites and calcrete were also formed at the land surface in the Olduvai region during two dry episodes of the Pleistocene before the gorge was eroded. Zeolites and dawsonite were formed by reaction of volcanic glass and nepheline with solutions of sodium carbonate and bicarbonate that were concentrated by evaporation in the soil and surface layers of rock. Hydration and carbonation appear to be the principal chemical changes in zeolitic alteration. 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.