Research Article| July 01, 2002 Enhanced airborne dispersal of silicic tephras during the onset of Northern Hemisphere glaciations, from 6 to 0 Ma records of explosive volcanism and climate change in the subpolar North Atlantic Christian Lacasse; Christian Lacasse 1Volcano Dynamics Group, Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK Search for other works by this author on: GSW Google Scholar Paul van den Bogaard Paul van den Bogaard 2Department of Volcanology and Petrology, GEOMAR Research Center for Marine Geosciences, Wischhofstrasse 1–3, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Christian Lacasse 1Volcano Dynamics Group, Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK Paul van den Bogaard 2Department of Volcanology and Petrology, GEOMAR Research Center for Marine Geosciences, Wischhofstrasse 1–3, D-24148 Kiel, Germany Publisher: Geological Society of America Received: 13 Nov 2001 Revision Received: 19 Mar 2002 Accepted: 09 Apr 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (7): 623–626. https://doi.org/10.1130/0091-7613(2002)030<0623:EADOST>2.0.CO;2 Article history Received: 13 Nov 2001 Revision Received: 19 Mar 2002 Accepted: 09 Apr 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Christian Lacasse, Paul van den Bogaard; Enhanced airborne dispersal of silicic tephras during the onset of Northern Hemisphere glaciations, from 6 to 0 Ma records of explosive volcanism and climate change in the subpolar North Atlantic. Geology 2002;; 30 (7): 623–626. doi: https://doi.org/10.1130/0091-7613(2002)030<0623:EADOST>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 SocietyGeology Search Advanced Search Abstract A 6-m.y.-long composite marine record of explosive silicic volcanism from five Ocean Drilling Program sites in the subpolar North Atlantic was compared with several marine records of global and local paleoclimate proxies (benthic δ18O and ice-rafted debris records). Coarsening and high frequency of occurrence of Icelandic tephras were recorded in 3.6–3 Ma sediments, suggesting that these tephras were dispersed farther from the source by enhanced westerly winds over the subpolar North Atlantic. The 40Ar/39Ar ages were determined by laser probe on K-feldspar and biotite phenocrysts of tephras that were erupted from the Jan Mayen volcanic system. Compared to the tuned paleomagnetic age model, the 40Ar/39Ar dating (0.618 ± 0.007 Ma to 4.90 ± 0.05 Ma) yields a new age model that postdates by 155 k.y. the inception of ice rafting on the Iceland Plateau during the cold marine isotope stage M2 (i.e., 3.3–3.14 Ma). You do not have access to this content, please speak to your institutional administrator if you feel you should have access.