Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia
We present 14 new 10Be cosmogenic nuclide exposure ages quantifying asynchronous readvances during the Antarctic Cold Reversal from glaciers in the Baker Valley region of central Patagonia. We constrain glacier and ice-dammed palaeolake dynamics using a landsystems approach, concentrating on outlet...
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ftuglasgow:oai:eprints.gla.ac.uk:169337 2023-05-15T13:54:32+02:00 Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia Davies, B.J. Thorndycraft, V.R. Fabel, D. Martin, J.R.V. 2018-11-15 text http://eprints.gla.ac.uk/169337/ http://eprints.gla.ac.uk/169337/1/169337.pdf en eng Elsevier http://eprints.gla.ac.uk/169337/1/169337.pdf Davies, B.J., Thorndycraft, V.R., Fabel, D. <http://eprints.gla.ac.uk/view/author/5585.html> and Martin, J.R.V. (2018) Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia. Quaternary Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 200, pp. 287-312. (doi:10.1016/j.quascirev.2018.09.025 <http://dx.doi.org/10.1016/j.quascirev.2018.09.025>) cc_by_4 CC-BY Articles PeerReviewed 2018 ftuglasgow https://doi.org/10.1016/j.quascirev.2018.09.025 2020-05-28T22:23:51Z We present 14 new 10Be cosmogenic nuclide exposure ages quantifying asynchronous readvances during the Antarctic Cold Reversal from glaciers in the Baker Valley region of central Patagonia. We constrain glacier and ice-dammed palaeolake dynamics using a landsystems approach, concentrating on outlet glaciers from the eastern Northern Patagonian Icefield (NPI) and Monte San Lorenzo (MSL). Soler Glacier (NPI) produced lateral moraines above Lago Bertrand from 15.1 ± 0.7 to 14.0 ± 0.6 ka, when it dammed the drainage of Lago General Carrera/Buenos Aires through Río Baker at a bedrock pinning point. At this time, Soler Glacier terminated into the 400 m “Deseado” level of the ice-dammed palaeolake. Later, Calluqueo Glacier (MSL) deposited subaerial and subaqueous moraines in the Salto Valley near Cochrane at 13.0 ± 0.6 ka. These moraines were deposited in an ice-dammed palaeolake unified through the Baker Valley (Lago Chalenko; 350 m asl). The Salto Valley glaciolacustrine landsystem includes subaqueous morainal banks, ice-scoured bedrock, glacial diamicton plastered onto valley sides, perched delta terraces, kame terraces, ice-contact fans, palaeoshorelines and subaerial push and lateral moraines. Boulders from the subaqueous Salto Moraine became exposed at 12.1 ± 0.6 years, indicating palaeolake drainage. These data show an asynchronous advance of outlet glaciers from the Northern Patagonian Icefield and Monte San Lorenzo during the Antarctic Cold Reversal. These advances occurred during a period of regional climatic cooling, but differential moraine extent and timing of advance was controlled by topography and calving processes. Article in Journal/Newspaper Antarc* Antarctic University of Glasgow: Enlighten - Publications Antarctic Bertrand ENVELOPE(-67.077,-67.077,-68.514,-68.514) Carrera ENVELOPE(-67.817,-67.817,-67.550,-67.550) Patagonia Soler ENVELOPE(-63.000,-63.000,-64.283,-64.283) The Antarctic The Baker ENVELOPE(-54.765,-54.765,49.667,49.667) Quaternary Science Reviews 200 287 312 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
description |
We present 14 new 10Be cosmogenic nuclide exposure ages quantifying asynchronous readvances during the Antarctic Cold Reversal from glaciers in the Baker Valley region of central Patagonia. We constrain glacier and ice-dammed palaeolake dynamics using a landsystems approach, concentrating on outlet glaciers from the eastern Northern Patagonian Icefield (NPI) and Monte San Lorenzo (MSL). Soler Glacier (NPI) produced lateral moraines above Lago Bertrand from 15.1 ± 0.7 to 14.0 ± 0.6 ka, when it dammed the drainage of Lago General Carrera/Buenos Aires through Río Baker at a bedrock pinning point. At this time, Soler Glacier terminated into the 400 m “Deseado” level of the ice-dammed palaeolake. Later, Calluqueo Glacier (MSL) deposited subaerial and subaqueous moraines in the Salto Valley near Cochrane at 13.0 ± 0.6 ka. These moraines were deposited in an ice-dammed palaeolake unified through the Baker Valley (Lago Chalenko; 350 m asl). The Salto Valley glaciolacustrine landsystem includes subaqueous morainal banks, ice-scoured bedrock, glacial diamicton plastered onto valley sides, perched delta terraces, kame terraces, ice-contact fans, palaeoshorelines and subaerial push and lateral moraines. Boulders from the subaqueous Salto Moraine became exposed at 12.1 ± 0.6 years, indicating palaeolake drainage. These data show an asynchronous advance of outlet glaciers from the Northern Patagonian Icefield and Monte San Lorenzo during the Antarctic Cold Reversal. These advances occurred during a period of regional climatic cooling, but differential moraine extent and timing of advance was controlled by topography and calving processes. |
format |
Article in Journal/Newspaper |
author |
Davies, B.J. Thorndycraft, V.R. Fabel, D. Martin, J.R.V. |
spellingShingle |
Davies, B.J. Thorndycraft, V.R. Fabel, D. Martin, J.R.V. Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia |
author_facet |
Davies, B.J. Thorndycraft, V.R. Fabel, D. Martin, J.R.V. |
author_sort |
Davies, B.J. |
title |
Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia |
title_short |
Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia |
title_full |
Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia |
title_fullStr |
Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia |
title_full_unstemmed |
Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia |
title_sort |
asynchronous glacier dynamics during the antarctic cold reversal in central patagonia |
publisher |
Elsevier |
publishDate |
2018 |
url |
http://eprints.gla.ac.uk/169337/ http://eprints.gla.ac.uk/169337/1/169337.pdf |
long_lat |
ENVELOPE(-67.077,-67.077,-68.514,-68.514) ENVELOPE(-67.817,-67.817,-67.550,-67.550) ENVELOPE(-63.000,-63.000,-64.283,-64.283) ENVELOPE(-54.765,-54.765,49.667,49.667) |
geographic |
Antarctic Bertrand Carrera Patagonia Soler The Antarctic The Baker |
geographic_facet |
Antarctic Bertrand Carrera Patagonia Soler The Antarctic The Baker |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://eprints.gla.ac.uk/169337/1/169337.pdf Davies, B.J., Thorndycraft, V.R., Fabel, D. <http://eprints.gla.ac.uk/view/author/5585.html> and Martin, J.R.V. (2018) Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia. Quaternary Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 200, pp. 287-312. (doi:10.1016/j.quascirev.2018.09.025 <http://dx.doi.org/10.1016/j.quascirev.2018.09.025>) |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.quascirev.2018.09.025 |
container_title |
Quaternary Science Reviews |
container_volume |
200 |
container_start_page |
287 |
op_container_end_page |
312 |
_version_ |
1766260491777212416 |