Eocene–Oligocene transition in Central Asia and its effects on mammalian evolution

Abstract

Research Article| February 01, 2010 Eocene–Oligocene transition in Central Asia and its effects on mammalian evolution Brian P. Kraatz; Brian P. Kraatz 1Department of Anatomy, Western University of Health Sciences, Pomona, California 91766, USA Search for other works by this author on: GSW Google Scholar Jonathan H. Geisler Jonathan H. Geisler 2Department of Geology and Geography, Georgia Southern Museum, Georgia Southern University, Statesboro, Georgia 30460, USA Search for other works by this author on: GSW Google Scholar Geology (2010) 38 (2): 111–114. https://doi.org/10.1130/G30619.1 Article history received: 18 Aug 2009 rev-recd: 21 Aug 2009 accepted: 24 Aug 2009 first online: 09 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 Brian P. Kraatz, Jonathan H. Geisler; Eocene–Oligocene transition in Central Asia and its effects on mammalian evolution. Geology 2010;; 38 (2): 111–114. doi: https://doi.org/10.1130/G30619.1 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 SocietyGeology Search Advanced Search Abstract The Eocene-Oligocene boundary (EOB) marks a period of dramatic global climatic change correlated with pronounced mammalian faunal change. The timing of these events is well constrained in North America and Europe, but the Asian record has yet to produce a synthetic section linking environmental change, mammalian fossils, and precise geochronological dates. Here we present the first magnetostratigraphic section for the Hsanda Gol Formation, Mongolia, which yields significant Oligocene fossils and also marks a pattern of aridification that is tightly correlated to the EOB (33.9 Ma), supporting a broader pattern of aridification in the central Asian plateau across the EOB. Oligocene faunas of Asia can now be confidently correlated to those of North America, Europe, and Africa. These results suggest that mammalian faunal turnover within Asia occurred slightly later than similar events within Europe, and question the influence of Asian immigrants on the Grande Coupure faunal turnover. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.