Uplift-driven expansion delayed by middle Holocene desiccation in Lake Winnipeg, Manitoba, Canada

Abstract

Research Article| August 01, 2001 Uplift-driven expansion delayed by middle Holocene desiccation in Lake Winnipeg, Manitoba, Canada C.F.M. Lewis; C.F.M. Lewis 1Geological Survey of Canada (Atlantic), Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada Search for other works by this author on: GSW Google Scholar D.L. Forbes; D.L. Forbes 1Geological Survey of Canada (Atlantic), Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada Search for other works by this author on: GSW Google Scholar B.J. Todd; B.J. Todd 1Geological Survey of Canada (Atlantic), Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada Search for other works by this author on: GSW Google Scholar E. Nielsen; E. Nielsen 2Manitoba Geological Survey, 1395 Ellice Avenue, Winnipeg, Manitoba R3G 3P2, Canada Search for other works by this author on: GSW Google Scholar L.H. Thorleifson; L.H. Thorleifson 3Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar P.J. Henderson; P.J. Henderson 3Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar I. McMartin; I. McMartin 3Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar T.W. Anderson; T.W. Anderson 4Canadian Museum of Nature, Box 3443, Station D, Ottawa, Ontario K1P 6P4, Canada Search for other works by this author on: GSW Google Scholar R.N. Betcher; R.N. Betcher 5Manitoba Water Resources Branch, 200 Saulteaux Crescent, Winnipeg, Manitoba R3J 3W3, Canada Search for other works by this author on: GSW Google Scholar W.M. Buhay; W.M. Buhay 6Department of Geography, University of Winnipeg, Winnipeg, Manitoba R3B 2E9, Canada Search for other works by this author on: GSW Google Scholar S.M. Burbidge; S.M. Burbidge 7Department of Earth Sciences, Carleton University, Ottawa, Ontario K1S 5B6, Canada Search for other works by this author on: GSW Google Scholar C.J. Schröder-Adams; C.J. Schröder-Adams 7Department of Earth Sciences, Carleton University, Ottawa, Ontario K1S 5B6, Canada Search for other works by this author on: GSW Google Scholar J.W. King; J.W. King 8Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882, USA Search for other works by this author on: GSW Google Scholar K. Moran; K. Moran 8Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882, USA Search for other works by this author on: GSW Google Scholar C. Gibson; C. Gibson 8Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882, USA Search for other works by this author on: GSW Google Scholar C.A. Jarrett; C.A. Jarrett 9K & K Geoscience, 17 Hawthorne Street, Dartmouth, Nova Scotia B2Y 2Y4, Canada Search for other works by this author on: GSW Google Scholar H.J. Kling; H.J. Kling 10Freshwater Institute, Fisheries and Oceans Canada, Winnipeg, Manitoba R3T 2N6, Canada Search for other works by this author on: GSW Google Scholar W.L. Lockhart; W.L. Lockhart 10Freshwater Institute, Fisheries and Oceans Canada, Winnipeg, Manitoba R3T 2N6, Canada Search for other works by this author on: GSW Google Scholar W.M. Last; W.M. Last 11Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada Search for other works by this author on: GSW Google Scholar G.L.D. Matile; G.L.D. Matile 12Manitoba Geological Survey, 1395 Ellice Avenue, Winnipeg, Manitoba R3G 3P2, Canada Search for other works by this author on: GSW Google Scholar J. Risberg; J. Risberg 13Department of Quaternary Research, Stockholm University, S-106 91 Stockholm, Sweden Search for other works by this author on: GSW Google Scholar C.G. Rodrigues; C.G. Rodrigues 14School of Physical Sciences, University of Windsor, Windsor, Ontario N9B 3P4, Canada Search for other works by this author on: GSW Google Scholar A.M. Telka; A.M. Telka 15Paleotec Services, 1-574 Somerset Street West, Ottawa, Ontario K1R 5K2, Canada Search for other works by this author on: GSW Google Scholar R.E. Vance R.E. Vance 16Natural Resources Canada, 580 Booth Street, Ottawa, Ontario K1A 0E4, Canada Search for other works by this author on: GSW Google Scholar Geology (2001) 29 (8): 743–746. https://doi.org/10.1130/0091-7613(2001)029<0743:UDEDBM>2.0.CO;2 Article history received: 26 Dec 2000 rev-recd: 23 Apr 2001 accepted: 02 May 2001 first online: 02 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 C.F.M. Lewis, D.L. Forbes, B.J. Todd, E. Nielsen, L.H. Thorleifson, P.J. Henderson, I. McMartin, T.W. Anderson, R.N. Betcher, W.M. Buhay, S.M. Burbidge, C.J. Schröder-Adams, J.W. King, K. Moran, C. Gibson, C.A. Jarrett, H.J. Kling, W.L. Lockhart, W.M. Last, G.L.D. Matile, J. Risberg, C.G. Rodrigues, A.M. Telka, R.E. Vance; Uplift-driven expansion delayed by middle Holocene desiccation in Lake Winnipeg, Manitoba, Canada. Geology 2001;; 29 (8): 743–746. doi: https://doi.org/10.1130/0091-7613(2001)029<0743:UDEDBM>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 New findings of paleoenvironmental change in Lake Winnipeg, southern Manitoba, reveal evidence of unexpectedly dry conditions from 7.5 to 4 ka (7500 to 4000 radiocarbon years before present), with reduced lake area in the north and a desiccated lake basin in the south. Changes in extent of this large lake, now ∼400 km long, can be explained by a combination of (1) expansion due to postglacial differential uplift (tilting), and (2) lake-area reduction due to drier climates associated with the former presence of dry-grassland vegetation. Comparing lake areas sustainable by grassland climate with computed potential lake areas based on the assumption of open (overflowing) conditions, we quantify the atmospheric moisture reduction represented by the middle Holocene dry conditions. This approach holds promise for calibrating regional models of climate change and exploring the effects of dry paleoclimates in other large lake basins such as the Laurentian Great Lakes. The ongoing postglacial tilting is of societal concern because it contributes to long-term lakeshore erosion and to the decrease in discharge capacity of the inflowing flood-prone Red River in a populated region. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.