NEW RADIOGENIC DATES ON IGNEOUS ROCKS FROM THE SOUTHERN LARAMIE RANGE, WYOMING

Abstract

Research Article| October 01, 1964 NEW RADIOGENIC DATES ON IGNEOUS ROCKS FROM THE SOUTHERN LARAMIE RANGE, WYOMING CLINTON S FERRIS, JR.; CLINTON S FERRIS, JR. DEPT. GEOLOGY, UNIVERSITY OF WYOMING, LARAMIE, WYOMING Search for other works by this author on: GSW Google Scholar HAROLD W KRUEGER HAROLD W KRUEGER DEPT. GEOLOGY, UNIVERSITY OF WYOMING, LARAMIE, WYOMING Search for other works by this author on: GSW Google Scholar Author and Article Information CLINTON S FERRIS, JR. DEPT. GEOLOGY, UNIVERSITY OF WYOMING, LARAMIE, WYOMING HAROLD W KRUEGER DEPT. GEOLOGY, UNIVERSITY OF WYOMING, LARAMIE, WYOMING Publisher: Geological Society of America Received: 04 May 1964 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1964, 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 (1964) 75 (10): 1051–1054. https://doi.org/10.1130/0016-7606(1964)75[1051:NRDOIR]2.0.CO;2 Article history Received: 04 May 1964 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 CLINTON S FERRIS, HAROLD W KRUEGER; NEW RADIOGENIC DATES ON IGNEOUS ROCKS FROM THE SOUTHERN LARAMIE RANGE, WYOMING. GSA Bulletin 1964;; 75 (10): 1051–1054. doi: https://doi.org/10.1130/0016-7606(1964)75[1051:NRDOIR]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 writers have obtained radiogenic dates on three different types of igneous rock in the southern Laramie Range to test the hypothesis that Paleozoic intrusion of mafic rocks was connected with structural activities involved in the preservation of near-by early Paleozoic sedimentary rocks. A small olivine diorite body was dated at 1320 ± 70 million years, a basalt dike at 1420 ± 70 million years, and the Sherman Granite, principal basement rock in the area, at 1380 ± 50 million years. Structural and petrologic evidence suggest that the diorite and the basalt are younger than the granite, but the dates preclude Paleozoic origin. 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.