Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina
Some researchers propose that summer insolation controls long-term changes in glacier extent during the Holocene. If this hypothesis is correct, the record of glacier fluctuations at high latitudes in the Southern Hemisphere should differ from that in the Northern Hemisphere. Although the chronology...
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ftconicet:oai:ri.conicet.gov.ar:11336/26740 2023-10-09T21:45:27+02:00 Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina Menounos, Brian Clague, John J. Osborn, Gerald Thompson Davis, P. Ponce, Juan Federico Goehring, Brent Maurer, Malyssa Rabassa, Jorge Oscar Coronato, Andrea Maria Josefa Marr, Rob application/pdf http://hdl.handle.net/11336/26740 eng eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2013.07.008 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277379113002667 http://hdl.handle.net/11336/26740 Menounos, Brian; Clague, John J.; Osborn, Gerald; Thompson Davis, P.; Ponce, Juan Federico; et al.; Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina; Elsevier; Quaternary Science Reviews; 77; 1-2013; 70-79 0277-3791 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ Late Pleistocene Holocene Cirques Tierra del Fuego Glacier Fluctuations Patagonia Surface Exposure Dating Tephrochronology https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.quascirev.2013.07.008 2023-09-24T19:24:02Z Some researchers propose that summer insolation controls long-term changes in glacier extent during the Holocene. If this hypothesis is correct, the record of glacier fluctuations at high latitudes in the Southern Hemisphere should differ from that in the Northern Hemisphere. Although the chronology of Holocene glacier fluctuations in the Northern Hemisphere is well established, much uncertainty remains in the ages of Holocene glacier fluctuations in the Southern Hemisphere, especially South America. Here we report on latest Pleistocene and Holocene glacier fluctuations at the southern end of the Andes north and west of Ushuaia, Argentina. Surface exposure ages (10Be) from glaciated bedrock beyond cirque moraines indicate that alpine areas were free of ice by ca 16.9 ka. One, and in some cases two, closely spaced moraines extend up to 2 km beyond Little Ice Age moraines within many of the cirques in the region. The mean age of five 10Be ages from two pre-Little Ice Age moraines is 14.27–12.67 ka, whereas a minimum limiting radiocarbon age for a smaller, recessional moraine in one cirque is 12.38–12.01 ka. Our ages imply that, following glacier retreat beginning about 18.52–17.17 ka, cirque glaciers first advanced during the Antarctic Cold Reversal (14.5–12.9 ka) and may have later advanced or stabilized in the Younger Dryas Chronozone (12.9–11.7 ka). Based on the distribution of thick, geochemically distinct, and well-dated Hudson tephra, no Holocene moraines appear to be older than 7.96–7.34 ka. At some sites, there is evidence for one or more advances of glaciers sometime between 7.96–7.34 ka and 5.29–5.05 ka to limits only tens of meters beyond Little Ice Age maximum positions. Taken together, the data: 1) do not support the summer insolation hypothesis to explain Holocene glacier fluctuations in southernmost Patagonia; 2) confirm paleobotanical evidence for a warm, dry early Holocene; and 3) suggest that some glaciers in the region reached extents comparable to those of the Little Ice Age shortly before ... Article in Journal/Newspaper Antarc* Antarctic Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Patagonia Argentina Hudson Ushuaia ENVELOPE(-40.000,-40.000,-82.167,-82.167) Quaternary Science Reviews 77 70 79 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Late Pleistocene Holocene Cirques Tierra del Fuego Glacier Fluctuations Patagonia Surface Exposure Dating Tephrochronology https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Late Pleistocene Holocene Cirques Tierra del Fuego Glacier Fluctuations Patagonia Surface Exposure Dating Tephrochronology https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Menounos, Brian Clague, John J. Osborn, Gerald Thompson Davis, P. Ponce, Juan Federico Goehring, Brent Maurer, Malyssa Rabassa, Jorge Oscar Coronato, Andrea Maria Josefa Marr, Rob Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina |
topic_facet |
Late Pleistocene Holocene Cirques Tierra del Fuego Glacier Fluctuations Patagonia Surface Exposure Dating Tephrochronology https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Some researchers propose that summer insolation controls long-term changes in glacier extent during the Holocene. If this hypothesis is correct, the record of glacier fluctuations at high latitudes in the Southern Hemisphere should differ from that in the Northern Hemisphere. Although the chronology of Holocene glacier fluctuations in the Northern Hemisphere is well established, much uncertainty remains in the ages of Holocene glacier fluctuations in the Southern Hemisphere, especially South America. Here we report on latest Pleistocene and Holocene glacier fluctuations at the southern end of the Andes north and west of Ushuaia, Argentina. Surface exposure ages (10Be) from glaciated bedrock beyond cirque moraines indicate that alpine areas were free of ice by ca 16.9 ka. One, and in some cases two, closely spaced moraines extend up to 2 km beyond Little Ice Age moraines within many of the cirques in the region. The mean age of five 10Be ages from two pre-Little Ice Age moraines is 14.27–12.67 ka, whereas a minimum limiting radiocarbon age for a smaller, recessional moraine in one cirque is 12.38–12.01 ka. Our ages imply that, following glacier retreat beginning about 18.52–17.17 ka, cirque glaciers first advanced during the Antarctic Cold Reversal (14.5–12.9 ka) and may have later advanced or stabilized in the Younger Dryas Chronozone (12.9–11.7 ka). Based on the distribution of thick, geochemically distinct, and well-dated Hudson tephra, no Holocene moraines appear to be older than 7.96–7.34 ka. At some sites, there is evidence for one or more advances of glaciers sometime between 7.96–7.34 ka and 5.29–5.05 ka to limits only tens of meters beyond Little Ice Age maximum positions. Taken together, the data: 1) do not support the summer insolation hypothesis to explain Holocene glacier fluctuations in southernmost Patagonia; 2) confirm paleobotanical evidence for a warm, dry early Holocene; and 3) suggest that some glaciers in the region reached extents comparable to those of the Little Ice Age shortly before ... |
format |
Article in Journal/Newspaper |
author |
Menounos, Brian Clague, John J. Osborn, Gerald Thompson Davis, P. Ponce, Juan Federico Goehring, Brent Maurer, Malyssa Rabassa, Jorge Oscar Coronato, Andrea Maria Josefa Marr, Rob |
author_facet |
Menounos, Brian Clague, John J. Osborn, Gerald Thompson Davis, P. Ponce, Juan Federico Goehring, Brent Maurer, Malyssa Rabassa, Jorge Oscar Coronato, Andrea Maria Josefa Marr, Rob |
author_sort |
Menounos, Brian |
title |
Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina |
title_short |
Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina |
title_full |
Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina |
title_fullStr |
Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina |
title_full_unstemmed |
Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina |
title_sort |
latest pleistocene and holocene glacier fluctuations in southernmost tierra del fuego, argentina |
publisher |
Elsevier |
url |
http://hdl.handle.net/11336/26740 |
long_lat |
ENVELOPE(-40.000,-40.000,-82.167,-82.167) |
geographic |
Antarctic The Antarctic Patagonia Argentina Hudson Ushuaia |
geographic_facet |
Antarctic The Antarctic Patagonia Argentina Hudson Ushuaia |
genre |
Antarc* Antarctic Tierra del Fuego |
genre_facet |
Antarc* Antarctic Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2013.07.008 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277379113002667 http://hdl.handle.net/11336/26740 Menounos, Brian; Clague, John J.; Osborn, Gerald; Thompson Davis, P.; Ponce, Juan Federico; et al.; Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina; Elsevier; Quaternary Science Reviews; 77; 1-2013; 70-79 0277-3791 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.07.008 |
container_title |
Quaternary Science Reviews |
container_volume |
77 |
container_start_page |
70 |
op_container_end_page |
79 |
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1779318885976113152 |