WHOLE-ROCK RUBIDIUM-STRONTIUM AGE OF THE SILURIAN-DEVONIAN BOUNDARY IN NORTHEASTERN NORTH AMERICA

Abstract

Research Article| October 01, 1966 WHOLE-ROCK RUBIDIUM-STRONTIUM AGE OF THE SILURIAN-DEVONIAN BOUNDARY IN NORTHEASTERN NORTH AMERICA MICHAEL L BOTTINO; MICHAEL L BOTTINO OLD DOMINION COLLEGE, NORFOLK, VIRGINIA, AND GODDARD SPACE FLIGHT CENTER, GREENBELT, MARYLAND (BOTTINO AND FULLAGAR) Search for other works by this author on: GSW Google Scholar PAUL D FULLAGAR PAUL D FULLAGAR OLD DOMINION COLLEGE, NORFOLK, VIRGINIA, AND GODDARD SPACE FLIGHT CENTER, GREENBELT, MARYLAND (BOTTINO AND FULLAGAR) Search for other works by this author on: GSW Google Scholar Author and Article Information MICHAEL L BOTTINO OLD DOMINION COLLEGE, NORFOLK, VIRGINIA, AND GODDARD SPACE FLIGHT CENTER, GREENBELT, MARYLAND (BOTTINO AND FULLAGAR) PAUL D FULLAGAR OLD DOMINION COLLEGE, NORFOLK, VIRGINIA, AND GODDARD SPACE FLIGHT CENTER, GREENBELT, MARYLAND (BOTTINO AND FULLAGAR) Publisher: Geological Society of America Received: 31 Jan 1966 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1966, 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 (1966) 77 (10): 1167–1176. https://doi.org/10.1130/0016-7606(1966)77[1167:WRAOTS]2.0.CO;2 Article history Received: 31 Jan 1966 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation MICHAEL L BOTTINO, PAUL D FULLAGAR; WHOLE-ROCK RUBIDIUM-STRONTIUM AGE OF THE SILURIAN-DEVONIAN BOUNDARY IN NORTHEASTERN NORTH AMERICA. GSA Bulletin 1966;; 77 (10): 1167–1176. doi: https://doi.org/10.1130/0016-7606(1966)77[1167:WRAOTS]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 Nine whole-rock samples of the Skala (post-Ludlow, pre-Gedinnian) age, volcanic rocks from the Eastport Formation, Eastport, Maine, and nine whole-rock samples of Lower Devonian (New Scotland age) volcanic rocks from the Hedgehog formation, Presque Isle, Maine, were analyzed for their rubidium, strontium, and strontium isotopic composition. Analyses of the Eastport Formation and Hedgehog formation volcanic rocks produced, respectively, isochron ages of 412 ± 5 m.y. (λRb87 = 1.39 × 10−11 year−1) with an initial ratio of 0.707 ± 0.001and 413 ± 10 m.y. with an initial ratio of 0.706 ± 0.002. The combined results give an age of 413 ± 5 m.y. for the Silurian-Devonian boundary; this age is based on the average of the age values of the individual samples, and the precision assigned is two standard deviations of the mean of the individual ages. This age is a precise measurement of the Silurian-Devonian boundary in northeastern North America and is in reasonable agreement with recent time-scale estimates considering the uncertainty of the Rb87 decay constant. 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.