Analysis of small-scale erosional data and a sequence of late Pleistocene flow reversal, northern New England

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Research Article| January 01, 1990 Analysis of small-scale erosional data and a sequence of late Pleistocene flow reversal, northern New England THOMAS V. LOWELL; THOMAS V. LOWELL 1Department of Geology, University of Cincinnati, Cincinnati, Ohio 45221 Search for other works by this author on: GSW Google Scholar J. STEVEN KITE; J. STEVEN KITE 2Department of Geology and Geography, West Virginia University, Morgantown, West Virginia 26506 Search for other works by this author on: GSW Google Scholar PARKER E. CALKIN; PARKER E. CALKIN 3Department of Geology, State University of New York at Buffalo, Buffalo, New York 14260 Search for other works by this author on: GSW Google Scholar ERIC F. HALTER ERIC F. HALTER 3Department of Geology, State University of New York at Buffalo, Buffalo, New York 14260 Search for other works by this author on: GSW Google Scholar Author and Article Information THOMAS V. LOWELL 1Department of Geology, University of Cincinnati, Cincinnati, Ohio 45221 J. STEVEN KITE 2Department of Geology and Geography, West Virginia University, Morgantown, West Virginia 26506 PARKER E. CALKIN 3Department of Geology, State University of New York at Buffalo, Buffalo, New York 14260 ERIC F. HALTER 3Department of Geology, State University of New York at Buffalo, Buffalo, New York 14260 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1990) 102 (1): 74–85. https://doi.org/10.1130/0016-7606(1990)102<0074:AOSSED>2.3.CO;2 Article history First Online: 01 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 THOMAS V. LOWELL, J. STEVEN KITE, PARKER E. CALKIN, ERIC F. HALTER; Analysis of small-scale erosional data and a sequence of late Pleistocene flow reversal, northern New England. GSA Bulletin 1990;; 102 (1): 74–85. doi: https://doi.org/10.1130/0016-7606(1990)102<0074:AOSSED>2.3.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 A sequence of latest Pleistocene ice-flow reversal, principally based on analysis of small-scale erosional features, has been reconstructed for northernmost New England. Single and crossing striations, together with small-scale stoss and lee or other erosional forms, provided more than 1,200 widely dispersed striation sets along with relative age data. The striations were grouped into grids from which vector-mean data were extracted and in turn five zones delineated, each characterized by similarities in ice flow. A sequence of six flow direction shifts between and within zones (for example, east-south-east flow gives way to north flow) was determined using a transition matrix of 159 striation sets. Nondirectional striation data, till-fabric measurements, and glacial-dispersal studies further complement the striation information.All these data were integrated to produce a sequence of ice flow that began with (interval A) east-southeast flow of the Laurentide ice sheet through Maine. Interval B involved a reversal of flow direction from eastward to northwestward in northern Maine, with development of an ice divide. During interval C, this divide strengthened and migrated southeastward, so that by interval D it occurred nearly 120 km southeast of the Québec-Maine border. Interval E encompassed a final northward flow from the northern flank of the Boundary Mountains and the start of rapid, large-scale stagnation of the last glacier of northern New England. 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.