Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA
Abstract We used a combination of accelerator mass spectrometry (AMS) radiocarbon dating, optically stimulated luminescence (OSL) age estimates, and stratigraphic data from cores collected along the southern margin of the Green Bay Lobe (GBL) of the Laurentide Ice Sheet to provide new information on...
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crcambridgeupr:10.1017/qua.2020.8 2024-09-15T18:12:14+00:00 Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA Carson, Eric C. Attig, John W. Rawling, J. Elmo Hanson, Paul R. Dodge, Stefanie E. 2020 http://dx.doi.org/10.1017/qua.2020.8 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589420000083 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 95, page 142-153 ISSN 0033-5894 1096-0287 journal-article 2020 crcambridgeupr https://doi.org/10.1017/qua.2020.8 2024-08-07T04:03:51Z Abstract We used a combination of accelerator mass spectrometry (AMS) radiocarbon dating, optically stimulated luminescence (OSL) age estimates, and stratigraphic data from cores collected along the southern margin of the Green Bay Lobe (GBL) of the Laurentide Ice Sheet to provide new information on the timing and dynamics of the end of advance of the GBL and the dynamics of the ice sheet while very near its maximum position. Coring at multiple sites along the margin of the GBL indicate that ice had reached a stable position near its maximum extent by 24.7 ka; that ice advanced several kilometers to the Marine Isotope Stage 2 maximum position sometime shortly after 21.2 ka; and that ice remained at or beyond that position through the time interval represented by an OSL age estimate of 19.2 ± 3.2 ka. The timeline developed from these chronological data is internally consistent with, and further refines, AMS radiocarbon ages and OSL age estimates previously published for the southern margin of the GBL. It also provides new chronological control on the expansion of the GBL from its late Marine Isotope Stage (MIS) 3 extent to its MIS 2 maximum. Article in Journal/Newspaper Ice Sheet Cambridge University Press Quaternary Research 95 142 153 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract We used a combination of accelerator mass spectrometry (AMS) radiocarbon dating, optically stimulated luminescence (OSL) age estimates, and stratigraphic data from cores collected along the southern margin of the Green Bay Lobe (GBL) of the Laurentide Ice Sheet to provide new information on the timing and dynamics of the end of advance of the GBL and the dynamics of the ice sheet while very near its maximum position. Coring at multiple sites along the margin of the GBL indicate that ice had reached a stable position near its maximum extent by 24.7 ka; that ice advanced several kilometers to the Marine Isotope Stage 2 maximum position sometime shortly after 21.2 ka; and that ice remained at or beyond that position through the time interval represented by an OSL age estimate of 19.2 ± 3.2 ka. The timeline developed from these chronological data is internally consistent with, and further refines, AMS radiocarbon ages and OSL age estimates previously published for the southern margin of the GBL. It also provides new chronological control on the expansion of the GBL from its late Marine Isotope Stage (MIS) 3 extent to its MIS 2 maximum. |
format |
Article in Journal/Newspaper |
author |
Carson, Eric C. Attig, John W. Rawling, J. Elmo Hanson, Paul R. Dodge, Stefanie E. |
spellingShingle |
Carson, Eric C. Attig, John W. Rawling, J. Elmo Hanson, Paul R. Dodge, Stefanie E. Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA |
author_facet |
Carson, Eric C. Attig, John W. Rawling, J. Elmo Hanson, Paul R. Dodge, Stefanie E. |
author_sort |
Carson, Eric C. |
title |
Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA |
title_short |
Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA |
title_full |
Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA |
title_fullStr |
Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA |
title_full_unstemmed |
Chronology of advance and recession dynamics of the southern Green Bay Lobe of the Laurentide Ice Sheet, south-central Wisconsin, USA |
title_sort |
chronology of advance and recession dynamics of the southern green bay lobe of the laurentide ice sheet, south-central wisconsin, usa |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/qua.2020.8 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589420000083 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Quaternary Research volume 95, page 142-153 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/qua.2020.8 |
container_title |
Quaternary Research |
container_volume |
95 |
container_start_page |
142 |
op_container_end_page |
153 |
_version_ |
1810449816902172672 |