Abstract
Research Article| August 01, 1962 Isotopic Age Study, Dutchess County, New York LEON E LONG LEON E LONG Lamont Geological Observatory (Columbia University), Palisades, N. Y 1 Present address: Department of Geology, University Museum, Oxford University, Oxford, England Search for other works by this author on: GSW Google Scholar Author and Article Information LEON E LONG 1 Present address: Department of Geology, University Museum, Oxford University, Oxford, England Lamont Geological Observatory (Columbia University), Palisades, N. Y Publisher: Geological Society of America Received: 07 Feb 1961 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1962, 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 (1962) 73 (8): 997–1006. https://doi.org/10.1130/0016-7606(1962)73[997:IASDCN]2.0.CO;2 Article history Received: 07 Feb 1961 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 LEON E LONG; Isotopic Age Study, Dutchess County, New York. GSA Bulletin 1962;; 73 (8): 997–1006. doi: https://doi.org/10.1130/0016-7606(1962)73[997:IASDCN]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 Rb-Sr and K-Ar isotopic age determinations on mica and whole-rock samples from Dutchess County, N. Y. are consistent with a period of metamorphism with a minimum age of 430 m. y. (million years), followed by a less intense regional reheating about 360 m. y. ago. Pre-existing radio-genic argon in detrital minerals in the isoclinally folded Paleozoic slates, west of Balk's (1936) biotite isograd, was driven out at the time of folding. Lower apparent ages in western Connecticut suggest a transitional zone to the area farther east affected by a 260 m. y. metamorphic event. 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.
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