An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex

QUATERNARY SCIENCE REVIEWS

卷:234

Review

Dalton, April S.^1,2  Margold, Martin²  Stokes, Chris R.¹  Tarasov, Lev³  Dyke, Arthur S.^4,5  Adams, Roberta S.⁶  Allard, Serge⁷  Arends, Heather E.⁸  Atkinson, Nigel⁹  Attig, John W.¹⁰  Barnett, Peter J.¹¹  Barnett, Robert L.^12,13,14  Batterson, Martin¹⁵  Bernatchez, Pascal^12,13  Borns, Harold W., Jr.¹⁶  Breckenridge, Andy¹⁷  Briner, Jason P.¹⁸  Brouard, Etienne^19,20,21  Campbell, Janet E.²²  Carlson, Anders E.²³  Clague, John J.²⁴  Curry, B. Brandon²⁵  Daigneault, Robert-Andre²⁶  Dube-Loubert, Hugo^27,28  Easterbrook, Don J.²⁹  Franzi, David A.³⁰  Friedrich, Hannah G.⁸  Funder, Svend³¹  Gauthier, Michelle S.³²  Gowan, Angela S.³³  Harris, Ken L.³⁴  Hetu, Bernard^12,13  Hooyer, Tom S.³⁵  Jennings, Carrie E.³⁶  Johnson, Mark D.³⁷  Kehew, Alan E.³⁸  Kelley, Samuel E.³⁹  Kerr, Daniel²²  King, Edward L.⁴⁰  Kjeldsen, Kristian K.⁴¹  Knaeble, Alan R.³³  Lajeunesse, Patrick^19,20  Lakeman, Thomas R.⁴²  Lamothe, Michel²¹  Larson, Phillip⁴³  Lavoie, Martin^19,20  Loope, Henry M.⁴⁴  Lowell, Thomas, V⁴⁵  Lusardi, Barbara A.³³  Manz, Lorraine³⁴  McMartin, Isabelle²²  Nixon, F. Chantel⁴⁶  Occhietti, Serge²⁶  Parkhill, Michael A.⁴⁷  Piper, David J. W.⁴⁰  Pronk, Antonius G.⁷  Richard, Pierre J. H.⁴⁸  Ridge, John C.⁴⁹  Ross, Martin⁵⁰  Roy, Martin²⁸  Seaman, Allen⁷  Shaw, John⁴⁰  Stea, Rudolph R.⁵¹  Teller, James T.⁵²  Thompson, Woodrow B.⁵³  Thorleifson, L. Harvey³³  Utting, Daniel J.⁵⁴  Veillette, Jean J.²²  Ward, Brent C.²⁴  Weddle, Thomas K.⁵³  Wright, Herbert E., Jr.³⁶ 

[1] Univ Durham, Dept Geog, Durham, England

[2] Charles Univ Prague, Dept Phys Geog & Geoecol, Prague, Czech Republic

[3] Mem Univ, Dept Phys & Phys Oceanog, St John, NF, Canada

[4] Dalhousie Univ, Dept Earth Sci, Halifax, NS, Canada

[5] McGill Univ, Dept Anthropol, Montreal, PQ, Canada

[6] Madrone Environm Serv Ltd, Abbotsford, BC, Canada

[7] New Brunswick Geol Survey, New Brunswick Dept Energy & Resource Dev, Fredericton, NB, Canada

[8] Minnesota Dept Nat Resources, Div Lands & Mineral, St Paul, MN USA

[9] Alberta Geol Survey, Edmonton, AB, Canada

[10] Wisconsin Geol & Nat Hist Survey, Madison, WI USA

[11] Laurentian Univ, Harquail Sch Earth Sci, Sudbury, ON, Canada

[12] Univ Quebec Rimouski, Dept Biol Chim & Geog, Rimouski, PQ, Canada

[13] Univ Quebec Rimouski, Ctr Northern Studies CEN, Rimouski, PQ, Canada

[14] Univ Exeter, Coll Life & Environm Sci, Geog, Exeter, Devon, England

[15] Geol Survey Newfoundland & Labrador, St John, NF, Canada

[16] Univ Maine, Sch Earth & Climate Sci, Orono, ME USA

[17] Univ Wisconsin Superior, Nat Sci Dept, Superior, WI USA

[18] Univ Buffalo, Dept Geol, Buffalo, NY USA

[19] Univ Laval, Dept Geog, Quebec City, PQ, Canada

[20] Univ Laval, Ctr Etud Nord, Quebec City, PQ, Canada

[21] Univ Quebec Montreal, Dept Sci Terre & Atmosphere, Montreal, PQ, Canada

[22] Nat Resources Canada, Geol Survey Canada, Ottawa, ON, Canada

[23] Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA

[24] Simon Fraser Univ, Dept Earth Sci, Burnaby, BC, Canada

[25] Univ Illinois, Prairie Res Inst, Illinois State Geol Survey, Champaign, IL USA

[26] Univ Quebec Montreal, Dept Geog, Montreal, PQ, Canada

[27] Minist Energy & Nat Resources Quebec, Val Dor, PQ, Canada

[28] Univ Quebec Montreal, Dept Sci Terre & Atmosphere, Ctr Rech GEOTOP, Montreal, PQ, Canada

[29] Western Washington Univ, Dept Geol, Bellingham, WA 98225 USA

[30] SUNY Coll Plattsburgh, Ctr Earth & Environm Sci, Plattsburgh, NY 12901 USA

[31] Univ Copenhagen, Globe Inst, Copenhagen, Denmark

[32] Manitoba Geol Survey, Winnipeg, MB, Canada

[33] Univ Minnesota, Minnesota Geol Survey, St Paul, MN 55108 USA

[34] North Dakota Geol Survey, Bismarck, ND USA

[35] Univ Wisconsin, Dept Geosci, Milwaukee, WI 53201 USA

[36] Univ Minnesota, Dept Earth & Environm Sci, Minneapolis, MN USA

[37] Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden

[38] Western Michigan Univ, Dept Geol & Environm Sci, Kalamazoo, MI 49008 USA

[39] Univ Coll Dublin, Sch Earth Sci, Dublin, Ireland

[40] Nat Resources Canada, Geol Survey Canada Atlantic, Bedford Inst Oceanog, Dartmouth, NS, Canada

[41] Geol Survey Denmark & Greenland GEUS, Dept Glaciol & Climate, Copenhagen, Denmark

[42] Geol Survey Norway, Trondheim, Norway

[43] Univ Minnesota, Swenson Coll Sci & Engn, Duluth, MN 55812 USA

[44] Indiana Univ, Indiana Geol & Water Survey, Bloomington, IN USA

[45] Univ Cincinnati, Dept Geol, Cincinnati, OH USA

[46] Norwegian Univ Sci & Technol, Dept Geog, Trondheim, Norway

[47] New Brunswick Geol Survey, New Brunswick Dept Energy & Resource Dev, Bathurst, NB, Canada

[48] Univ Montreal, Dept Geog, Montreal, PQ, Canada

[49] Tufts Univ, Dept Earth & Ocean Sci, Medford, MA 02155 USA

[50] Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON, Canada

[51] Stea Surficial Geol Serv, Halifax, NS, Canada

[52] Univ Manitoba, Dept Geol Sci, Winnipeg, MB, Canada

[53] Maine Geol Survey, Augusta, ME USA

[54] Alberta Energy Regulator, Calgary, AB, Canada

关键词: Quaternary;    Glaciation;    North America;    Ice margin chronology;    Radiocarbon;   

DOI  :  10.1016/j.quascirev.2020.106223

来源: Elsevier

【 摘 要 】

The North American Ice Sheet Complex (NAISC; consisting of the Laurentide, Cordilleran and Innuitian ice sheets) was the largest ice mass to repeatedly grow and decay in the Northern Hemisphere during the Quaternary. Understanding its pattern of retreat following the Last Glacial Maximum is critical for studying many facets of the Late Quaternary, including ice sheet behaviour, the evolution of Holocene landscapes, sea level, atmospheric circulation, and the peopling of the Americas. Currently, the most up-to-date and authoritative margin chronology for the entire ice sheet complex is featured in two publications (Geological Survey of Canada Open File 1574 [Dyke et al., 2003]; 'Quaternary Glaciations - Extent and Chronology, Part II' [Dyke, 2004]). These often-cited datasets track ice margin recession in 36 time slices spanning 18 ka to 1 ka (all ages in uncalibrated radiocarbon years) using a combination of geomorphology, stratigraphy and radiocarbon dating. However, by virtue of being over 15 years old, the ice margin chronology requires updating to reflect new work and important revisions. This paper updates the aforementioned 36 ice margin maps to reflect new data from regional studies. We also update the original radiocarbon dataset from the 2003/2004 papers with 1541 new ages to reflect work up to and including 2018. A major revision is made to the 18 ka ice margin, where Banks and Eglinton islands (once considered to be glacial refugia) are now shown to be fully glaciated. Our updated 18 ka ice sheet increased in areal extent from 17.81 to 18.37 million km(2), which is an increase of 3.1% in spatial coverage of the NAISC at that time. Elsewhere, we also summarize, region-by-region, significant changes to the deglaciation sequence. This paper integrates new information provided by regional experts and radiocarbon data into the deglaciation sequence while maintaining consistency with the original ice margin positions of Dyke et al. (2003) and Dyke (2004) where new information is lacking; this is a pragmatic solution to satisfy the needs of a Quaternary research community that requires up-to-date knowledge of the pattern of ice margin recession of what was once the world's largest ice mass. The 36 updated isochrones are available in PDF and shapefile format, together with a spreadsheet of the expanded radiocarbon dataset (n = 5195 ages) and estimates of uncertainty for each interval. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

Free