Support for a stable late Wisconsin ice margin (14,000 to ∼9000 B.P.): A test based on glacial rebound

Abstract

Research Article| November 01, 1975 Support for a stable late Wisconsin ice margin (14,000 to ∼9000 B.P.): A test based on glacial rebound J. T. Andrews J. T. Andrews 1Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, Boulder, Colorado 80302 Search for other works by this author on: GSW Google Scholar Geology (1975) 3 (11): 617–620. https://doi.org/10.1130/0091-7613(1975)3<617:SFASLW>2.0.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation J. T. Andrews; Support for a stable late Wisconsin ice margin (14,000 to ∼9000 B.P.): A test based on glacial rebound. Geology 1975;; 3 (11): 617–620. doi: https://doi.org/10.1130/0091-7613(1975)3<617:SFASLW>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 SocietyGeology Search Advanced Search Abstract Three alternative hypotheses for the timing and rate of deglaciation in the outer fiords and coasts of the eastern Canadian Arctic are tested by a computer program that provides information on the amount and form of crustal deflection according to a two-layer geophysical model. The three alternative hypotheses are (1) a glacial advance that started about 20,000 B.P. and reached a maximum at the outer coast at 18,000 B.P. and a slow glacial retreat that began at 14,000 B.P., (2) a glacial advance about 20,000 B.P. with the glacial margin stabilized along the Cockburn moraines near the fiord heads from 15,000 to 8000 B.P., and (3) a glacial advance to the coast from 20,000 to 19,000 B.P. with the glacial margin stabilized until 9000 B.P. and then a rapid glacial retreat to the fiord heads.The derived-deflection and relative-sea-level curves, for a position equivalent to the outer coast of Baffin Island, indicate that the results from hypotheses 1 and 3 are incompatible with the observed distribution of raised Holocene and late Pleistocene marine sediments and their associated 14C dates. In contrast, the curve for relative sea level from hypothesis 2 explains significant elements of the distribution of radiocarbon dates and suggests that a marine transgression affected the outer coast until about 8500 B.P. The marine transgression was not caused by the peak in eustatic sea level but by the glacio-isotatic depression of the coast maintained by the stable mass of the northeastern sector of the Laurentide 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.