Rock varnish evidence for latest Pleistocene millennial-scale wet events in the drylands of western United States

Research Article| May 01, 2008 Rock varnish evidence for latest Pleistocene millennial-scale wet events in the drylands of western United States Tanzhuo Liu; Tanzhuo Liu 1Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Wallace S. Broecker Wallace S. Broecker 1Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Tanzhuo Liu 1Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA Wallace S. Broecker 1Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA Publisher: Geological Society of America Received: 04 Nov 2007 Revision Received: 25 Jan 2008 Accepted: 28 Jan 2008 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2008 Geological Society of America Geology (2008) 36 (5): 403–406. https://doi.org/10.1130/G24573A.1 Article history Received: 04 Nov 2007 Revision Received: 25 Jan 2008 Accepted: 28 Jan 2008 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Tanzhuo Liu, Wallace S. Broecker; Rock varnish evidence for latest Pleistocene millennial-scale wet events in the drylands of western United States. Geology 2008;; 36 (5): 403–406. doi: https://doi.org/10.1130/G24573A.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 Rock varnish from late to latest Pleistocene geomorphic features in the drylands of the western U.S. provides evidence of nine millennial-scale wet events from 11,500–18,000 calendar yr B.P., represented by regionally replicable and approximately evenly spaced manganese- and barium-rich dark bands in varnish microstratigraphy. Preliminary radiometric age calibration indicates that these events appear to be broadly coeval with millennial-scale cooling events identified in the Greenland Ice Sheet Project 2 (GISP2) ice core record. Six of these wet events are associated with the cold intervals of the Younger Dryas and Heinrich event H1, and the other three with the short-lived cooling phases of the Intra-Allerød Cold Period, the Older Dryas, and the Oldest Dryas. These results, combined with our previous documentation of millennial-scale wet events in the Holocene varnish record for the same region, indicate that such wet oscillations in the western U.S. may be parts of regionally widespread manifestation of well-documented, pervasive millennial-scale cycles of the North Atlantic climate. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.