Research Article| January 01, 2004 40Ar/39Ar geochronology of the Eocene Green River Formation, Wyoming: Discussion William C. Clyde; William C. Clyde 1Department of Earth Sciences, University of New Hampshire, James Hall, 56 College Road, Durham, New Hampshire 03824, USA Search for other works by this author on: GSW Google Scholar William S. Bartels; William S. Bartels 2Department of Geological Sciences, Albion College, Albion, Michigan 49224, USA Search for other works by this author on: GSW Google Scholar Gregg F. Gunnell; Gregg F. Gunnell 3Museum of Paleontology, University of Michigan, 1109 Geddes Avenue, Ann Arbor, Michigan 48109, USA Search for other works by this author on: GSW Google Scholar John-Paul Zonneveld John-Paul Zonneveld 4Geological Survey of Canada, 3303 33rd St. NW, Calgary, Alberta T2L 2A7, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information William C. Clyde 1Department of Earth Sciences, University of New Hampshire, James Hall, 56 College Road, Durham, New Hampshire 03824, USA William S. Bartels 2Department of Geological Sciences, Albion College, Albion, Michigan 49224, USA Gregg F. Gunnell 3Museum of Paleontology, University of Michigan, 1109 Geddes Avenue, Ann Arbor, Michigan 48109, USA John-Paul Zonneveld 4Geological Survey of Canada, 3303 33rd St. NW, Calgary, Alberta T2L 2A7, Canada Publisher: Geological Society of America Received: 07 May 2003 Revision Received: 10 Sep 2003 Accepted: 11 Sep 2003 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2004) 116 (1-2): 251–252. https://doi.org/10.1130/B25398.1 Article history Received: 07 May 2003 Revision Received: 10 Sep 2003 Accepted: 11 Sep 2003 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 William C. Clyde, William S. Bartels, Gregg F. Gunnell, John-Paul Zonneveld; 40Ar/39Ar geochronology of the Eocene Green River Formation, Wyoming: Discussion. GSA Bulletin 2004;; 116 (1-2): 251–252. doi: https://doi.org/10.1130/B25398.1 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 Smith et al. (2003, hereafter referred to as Smith et al.) present seven new isotopic ages from the Green River Formation in the greater Green River Basin. These data provide welcome new information in the ongoing effort to develop a coherent and reliable geochron ological framework for this large and stratigraphically complex basin. Several of their main conclusions are based on a revised age estimate for the Wasatchian-Bridgerian North American Land Mammal Age boundary. For instance, Smith et al. use the revised age estimate for the Wasatchian-Bridgerian boundary to argue that the onset of maximum temperatures during the early... You do not have access to this content, please speak to your institutional administrator if you feel you should have access.