Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma
[1] How has the Antarctic Ice Sheet responded to or influenced global climate change? This simple question has been difficult to address because the long-term records of the ice sheet's fluctuations are poorly constrained with geologic data from Antarctica. Thus studies to date have not convinc...
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ftlouisianastuir:oai:digitalcommons.lsu.edu:geo_pubs-2070 2023-06-11T04:06:18+02:00 Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma Bart, Philip J. Egan, Dave Warny, Sophie A. 2005-12-01T08:00:00Z application/pdf https://digitalcommons.lsu.edu/geo_pubs/1071 https://doi.org/10.1029/2004JF000254 https://digitalcommons.lsu.edu/context/geo_pubs/article/2070/viewcontent/1071.pdf unknown LSU Digital Commons https://digitalcommons.lsu.edu/geo_pubs/1071 doi:10.1029/2004JF000254 https://digitalcommons.lsu.edu/context/geo_pubs/article/2070/viewcontent/1071.pdf Faculty Publications text 2005 ftlouisianastuir https://doi.org/10.1029/2004JF000254 2023-05-28T18:24:03Z [1] How has the Antarctic Ice Sheet responded to or influenced global climate change? This simple question has been difficult to address because the long-term records of the ice sheet's fluctuations are poorly constrained with geologic data from Antarctica. Thus studies to date have not convincingly established how specific Antarctic Ice Sheet events correlate with climatic, eustatic, or other phenomena known from low-latitude and deep-sea records. This study focused on documenting the direct record of ice sheet advance and retreat to the Antarctic Peninsula's shelf edge. On the peninsula's outer shelf, seismic reflectors interpreted to be subglacial unconformities were correlated with published results from Ocean Drilling Program Leg 178. Lithologic and chronologic control at two drill sites provided ground truth for the seismic interpretation and the timing of the Antarctic Peninsula Ice Sheet grounding events. This synthesis showed that grounded ice advanced to the shelf edge on at least 12 occasions between 5.12 and 7.94 Ma. Copyright 2005 by the American Geophysical Union. Text Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet LSU Digital Commons (Louisiana State University) Antarctic The Antarctic Antarctic Peninsula Journal of Geophysical Research: Earth Surface 110 F4 n/a n/a |
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[1] How has the Antarctic Ice Sheet responded to or influenced global climate change? This simple question has been difficult to address because the long-term records of the ice sheet's fluctuations are poorly constrained with geologic data from Antarctica. Thus studies to date have not convincingly established how specific Antarctic Ice Sheet events correlate with climatic, eustatic, or other phenomena known from low-latitude and deep-sea records. This study focused on documenting the direct record of ice sheet advance and retreat to the Antarctic Peninsula's shelf edge. On the peninsula's outer shelf, seismic reflectors interpreted to be subglacial unconformities were correlated with published results from Ocean Drilling Program Leg 178. Lithologic and chronologic control at two drill sites provided ground truth for the seismic interpretation and the timing of the Antarctic Peninsula Ice Sheet grounding events. This synthesis showed that grounded ice advanced to the shelf edge on at least 12 occasions between 5.12 and 7.94 Ma. Copyright 2005 by the American Geophysical Union. |
format |
Text |
author |
Bart, Philip J. Egan, Dave Warny, Sophie A. |
spellingShingle |
Bart, Philip J. Egan, Dave Warny, Sophie A. Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma |
author_facet |
Bart, Philip J. Egan, Dave Warny, Sophie A. |
author_sort |
Bart, Philip J. |
title |
Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma |
title_short |
Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma |
title_full |
Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma |
title_fullStr |
Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma |
title_full_unstemmed |
Direct constraints on Antarctic Peninsula Ice Sheet grounding events between 5.12 and 7.94 Ma |
title_sort |
direct constraints on antarctic peninsula ice sheet grounding events between 5.12 and 7.94 ma |
publisher |
LSU Digital Commons |
publishDate |
2005 |
url |
https://digitalcommons.lsu.edu/geo_pubs/1071 https://doi.org/10.1029/2004JF000254 https://digitalcommons.lsu.edu/context/geo_pubs/article/2070/viewcontent/1071.pdf |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
op_source |
Faculty Publications |
op_relation |
https://digitalcommons.lsu.edu/geo_pubs/1071 doi:10.1029/2004JF000254 https://digitalcommons.lsu.edu/context/geo_pubs/article/2070/viewcontent/1071.pdf |
op_doi |
https://doi.org/10.1029/2004JF000254 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
110 |
container_issue |
F4 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1768378175424823296 |