A unique annually laminated maar lake sediment record shows orbital control of Southern Hemisphere midlatitude climate across the Oligocene-Miocene boundary

Abstract

Research Article| March 01, 2016 A unique annually laminated maar lake sediment record shows orbital control of Southern Hemisphere midlatitude climate across the Oligocene-Miocene boundary B.R.S. Fox; B.R.S. Fox † 1School of Science, University of Waikato, Private Bag 3105, Hamilton 3240, New Zealand †[e-mail] Search for other works by this author on: GSW Google Scholar G.S. Wilson; G.S. Wilson 2Department of Marine Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand3Department of Geology, University of Otago, PO Box 56, Dunedin 9054, New Zealand Search for other works by this author on: GSW Google Scholar D.E. Lee D.E. Lee 3Department of Geology, University of Otago, PO Box 56, Dunedin 9054, New Zealand Search for other works by this author on: GSW Google Scholar Author and Article Information B.R.S. Fox † 1School of Science, University of Waikato, Private Bag 3105, Hamilton 3240, New Zealand G.S. Wilson 2Department of Marine Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand3Department of Geology, University of Otago, PO Box 56, Dunedin 9054, New Zealand D.E. Lee 3Department of Geology, University of Otago, PO Box 56, Dunedin 9054, New Zealand †[e-mail] Publisher: Geological Society of America Received: 07 May 2015 Revision Received: 12 Jul 2015 Accepted: 28 Sep 2015 First Online: 09 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2015 Geological Society of America GSA Bulletin (2016) 128 (3-4): 609–626. https://doi.org/10.1130/B31349.1 Article history Received: 07 May 2015 Revision Received: 12 Jul 2015 Accepted: 28 Sep 2015 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation B.R.S. Fox, G.S. Wilson, D.E. Lee; A unique annually laminated maar lake sediment record shows orbital control of Southern Hemisphere midlatitude climate across the Oligocene-Miocene boundary. GSA Bulletin 2016;; 128 (3-4): 609–626. doi: https://doi.org/10.1130/B31349.1 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 Abstract The Foulden Maar deposit, a finely laminated lacustrine diatomite from the South Island of New Zealand, is the first high-resolution Oligocene-Miocene terrestrial climate record from the midlatitudes of the Southern Hemisphere. We use the presence of orbital and solar cycles within the physical properties records from the deposit to infer that the laminations are annual varves and that the deposit spans ∼100 k.y. When combined with magnetostratigraphy and 40Ar/39Ar data, we can assign the diatomite to chron C6Cn.2n (23.033–22.931 Ma), coeval with the rapid deglaciation of Antarctica during the second half of the Mi-1 transient glaciation event. Both obliquity and precession cycles occur in the physical properties records from the site, indicating a strong ocean-atmosphere coupling in the Southern Hemisphere and influence from both low and high latitudes. The appearance of a strong obliquity component, in particular, may indicate a transient incursion of the Subtropical Front onto the Campbell Plateau during the Mi-1 deglaciation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.