Quaternary glaciation, west-central Maine

Research Article| December 01, 1977 Quaternary glaciation, west-central Maine HAROLD W. BORNS, JR.; HAROLD W. BORNS, JR. 1Institute for Quaternary Studies and Department of Geological Sciences, University of Maine, Orono, Maine 04473 Search for other works by this author on: GSW Google Scholar PARKER E. CALKIN PARKER E. CALKIN 2Department of Geological Sciences, State University of New York at Buffalo, Buffalo, New York 14226 Search for other works by this author on: GSW Google Scholar Author and Article Information HAROLD W. BORNS, JR. 1Institute for Quaternary Studies and Department of Geological Sciences, University of Maine, Orono, Maine 04473 PARKER E. CALKIN 2Department of Geological Sciences, State University of New York at Buffalo, Buffalo, New York 14226 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1977) 88 (12): 1773–1784. https://doi.org/10.1130/0016-7606(1977)88<1773:QGWM>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation HAROLD W. BORNS, PARKER E. CALKIN; Quaternary glaciation, west-central Maine. GSA Bulletin 1977;; 88 (12): 1773–1784. doi: https://doi.org/10.1130/0016-7606(1977)88<1773:QGWM>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 SocietyGSA Bulletin Search Advanced Search Abstract The highlands of west-central Maine, including the Longfellow and Boundary Mountains, were overridden at least twice, probably three times, by a continental ice sheet during Wisconsinan time. These episodes are indicated by at least five widely separated exposures displaying two-drift sequences composed of thick lodgment tills separated by glaciolacustrine and fluvial sediment. Radiocarbon dates on an intertill pollen- and wood-bearing deposit at New Sharon, Maine, record a major nonglacial interval that ended more than 52,000 B.P.The last ice sheet, actively building end moraines along the Maine coast 13,500 yr ago, had thinned, separated, stagnated, and dissipated over the Longfellow and Boundary Mountains at least by 12,500 B.P. Contemporaneous stagnation, throughout and southeast of the mountains, is evidenced by the distribution and volume of ice-contact stratified drift. Coupled with this is the lack of evidence for receding active ice margins associated with either the Laurentide Ice Sheet or a late-glacial locally centered ice cap suggested by some workers. In addition, the highest cirques in the study area, floored at approximately 930 m, reveal no evidence of reactivation during and subsequent to the dissipation of the last ice sheet. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.