Late Wisconsinan stratigraphy in the lower Sandy River valley, New Sharon, Maine

Abstract

Research Article| October 01, 1992 Late Wisconsinan stratigraphy in the lower Sandy River valley, New Sharon, Maine THOMAS KIRK WEDDLE THOMAS KIRK WEDDLE 1Maine Geological Survey, State House Station No. 22, Augusta, Maine 04333 Search for other works by this author on: GSW Google Scholar Author and Article Information THOMAS KIRK WEDDLE 1Maine Geological Survey, State House Station No. 22, Augusta, Maine 04333 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1992) 104 (10): 1350–1363. https://doi.org/10.1130/0016-7606(1992)104<1350:LWSITL>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 KIRK WEDDLE; Late Wisconsinan stratigraphy in the lower Sandy River valley, New Sharon, Maine. GSA Bulletin 1992;; 104 (10): 1350–1363. doi: https://doi.org/10.1130/0016-7606(1992)104<1350:LWSITL>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 Quaternary glacigenic deposits exposed along the Sandy River valley in New Sharon, Maine, are associated with ice-proximal deposition in a northeast-trending stream valley. Fine-grained sediments represent distal deposits by turbidite deposition, turbid sediment plumes, and associated ice-rafted debris in a proglacial lake. Coarse-grained deposits and stratified diamicton are ice-proximal sediments deposited by gravity-flow processes, subaqueous sediment discharge, and fluvial deposition. Massive diamicton was deposited by subaqueous sediment discharge or by subglacial processes.In contrast to previous depositional models that call for multiple glaciations to reflect the various facies, the glacigenic sediments at New Sharon were deposited entirely during a single glacial cycle, the late Wisconsinan. Glacitectonic and petrofabric data reflect an upsection shift in deformation from a northeast to a northwest source, attributed to late Wisconsinan sublobes in the Sandy River and Kennebec River valleys. Ice in the Kennebec River valley dammed drainage in the northeast-oriented lower Sandy River valley, creating a proglacial lake into which both sublobes deposited and deformed proglacial sediments during the early late Wisconsinan. Mainphase Laurentide ice eventually merged with and overwhelmed the sublobes. 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.