Depositional Environment of Paleozoic Glacial Rocks in the Central Transantarctic Mountains

Abstract

Research Article| April 01, 1970 Depositional Environment of Paleozoic Glacial Rocks in the Central Transantarctic Mountains JOHN F LINDSAY JOHN F LINDSAY Institute of Polar Studies, Ohio State University, Columbus, Ohio 43210 AUTHOR'S PRESENT ADDRESS: NASA, MANNED SPACECRAFT CENTER, HOUSTON, TEXAS 77058 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1970) 81 (4): 1149–1172. https://doi.org/10.1130/0016-7606(1970)81[1149:DEOPGR]2.0.CO;2 Article history received: 26 Jun 1969 accepted: 08 Oct 1969 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation JOHN F LINDSAY; Depositional Environment of Paleozoic Glacial Rocks in the Central Transantarctic Mountains. GSA Bulletin 1970;; 81 (4): 1149–1172. doi: https://doi.org/10.1130/0016-7606(1970)81[1149:DEOPGR]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 Permian glacial sediments of the Pagoda Formation in the central Transantarctic Mountains range from 126 to 395 m in thickness. Grooved sandstone lenses within the tillite beds indicate that they were deposited during retreat phases from active temperate ice which flowed to the southeast. Several interbeds and sedimentary breaks within the formation suggest possibly as many as 13 minor advances and retreats of the ice front. Grooved surfaces and clast fabrics indicate that the ice moved across the area in a direction of 148° ± 19°. The paleo-ice flow directions vary randomly about the mean from bed to bed, probably in response to local conditions. Between ice advances, streams, some of them quite large, flowed across a subdued topography and were locally diverted or dammed by the retreating ice front.The extent and continuity of the Paleozoic glacial deposits and the consistency in paleo-ice flow direction in Antarctica suggest an ice sheet of continental dimensions centered on southern Victoria Land. Dark shales conformably overlying the tillites over much of their known extent appear to have been deposited as the ice retreated prior to isostatic rebound of the depressed subglacial surface. 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.