Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications
This paper investigates several wedge structures formed in continental deposits covering marine sediments deposited during MIS 5 along the central Patagonian coast of Argentina. The size and surface microtexture characteristics of the infilling sediments are consistent with a depositional environmen...
Published in: | Geografiska Annaler: Series A, Physical Geography |
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Online Access: | http://hdl.handle.net/2122/11949 https://doi.org/10.1111/geoa.12038 |
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ftingv:oai:www.earth-prints.org:2122/11949 2023-05-15T14:01:37+02:00 Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications Ribolini, Adriano Bini, Monica Consoloni, Ilaria Isola, Ilaria Pappalardo, Marta Zanchetta, Giovanni Fuck, Enrique Panzieri, Laura Martini, Marco Terrasi, Filippo #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia 2016 http://hdl.handle.net/2122/11949 https://doi.org/10.1111/geoa.12038 en eng Geografiska Annaler: Series A, Physical Geography /96 (2016) http://hdl.handle.net/2122/11949 doi:10.1111/geoa.12038 restricted ice-wedge MIS5 Patagonia Argentina article 2016 ftingv https://doi.org/10.1111/geoa.12038 2022-07-29T06:07:34Z This paper investigates several wedge structures formed in continental deposits covering marine sediments deposited during MIS 5 along the central Patagonian coast of Argentina. The size and surface microtexture characteristics of the infilling sediments are consistent with a depositional environment dominated by aeolian transport. Fragments of Andean volcanic rocks (glass shards) in the wedge-fill suggest long-distance transport via a westerly component of wind direction. The wedges are interpreted as products of deep seasonal frost action in frozen ground, which produced open cracks that filled rapidly with partially non-local aeolian sediments. Many wedges cross cut carbonate crusts that formed under permafrost conditions in coastal Patagonia. The radiocarbon dating of carbonate crusts yielded an age of 25–27 kyr bp, while wedge-fill sediments are OSL dated to 14 670 ± 750 yr bp. This indicates that ground wedge formation occurred during a cold event (the Antarctic Cold Reversal period) that interrupted the permafrost degradation following the Last Glacial Maximum. University of Pisa (Progetto Ateneo 2007, Leader G. Zanchetta) and MIUR (PRIN2008, Leader G. Zanchetta).CADACE no-profit organization for providing logistical support to the field campaign. Published 161-176 5A. Paleoclima e ricerche polari JCR Journal Article in Journal/Newspaper Antarc* Antarctic Ice permafrost wedge* Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic Argentina Patagonia The Antarctic Geografiska Annaler: Series A, Physical Geography 96 2 161 176 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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ftingv |
language |
English |
topic |
ice-wedge MIS5 Patagonia Argentina |
spellingShingle |
ice-wedge MIS5 Patagonia Argentina Ribolini, Adriano Bini, Monica Consoloni, Ilaria Isola, Ilaria Pappalardo, Marta Zanchetta, Giovanni Fuck, Enrique Panzieri, Laura Martini, Marco Terrasi, Filippo Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications |
topic_facet |
ice-wedge MIS5 Patagonia Argentina |
description |
This paper investigates several wedge structures formed in continental deposits covering marine sediments deposited during MIS 5 along the central Patagonian coast of Argentina. The size and surface microtexture characteristics of the infilling sediments are consistent with a depositional environment dominated by aeolian transport. Fragments of Andean volcanic rocks (glass shards) in the wedge-fill suggest long-distance transport via a westerly component of wind direction. The wedges are interpreted as products of deep seasonal frost action in frozen ground, which produced open cracks that filled rapidly with partially non-local aeolian sediments. Many wedges cross cut carbonate crusts that formed under permafrost conditions in coastal Patagonia. The radiocarbon dating of carbonate crusts yielded an age of 25–27 kyr bp, while wedge-fill sediments are OSL dated to 14 670 ± 750 yr bp. This indicates that ground wedge formation occurred during a cold event (the Antarctic Cold Reversal period) that interrupted the permafrost degradation following the Last Glacial Maximum. University of Pisa (Progetto Ateneo 2007, Leader G. Zanchetta) and MIUR (PRIN2008, Leader G. Zanchetta).CADACE no-profit organization for providing logistical support to the field campaign. Published 161-176 5A. Paleoclima e ricerche polari JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia |
format |
Article in Journal/Newspaper |
author |
Ribolini, Adriano Bini, Monica Consoloni, Ilaria Isola, Ilaria Pappalardo, Marta Zanchetta, Giovanni Fuck, Enrique Panzieri, Laura Martini, Marco Terrasi, Filippo |
author_facet |
Ribolini, Adriano Bini, Monica Consoloni, Ilaria Isola, Ilaria Pappalardo, Marta Zanchetta, Giovanni Fuck, Enrique Panzieri, Laura Martini, Marco Terrasi, Filippo |
author_sort |
Ribolini, Adriano |
title |
Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications |
title_short |
Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications |
title_full |
Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications |
title_fullStr |
Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications |
title_full_unstemmed |
Late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications |
title_sort |
late‐pleistocene wedge structures along the patagonian coast (argentina): chronological constraints and palaeo‐environmental implications |
publishDate |
2016 |
url |
http://hdl.handle.net/2122/11949 https://doi.org/10.1111/geoa.12038 |
geographic |
Antarctic Argentina Patagonia The Antarctic |
geographic_facet |
Antarctic Argentina Patagonia The Antarctic |
genre |
Antarc* Antarctic Ice permafrost wedge* |
genre_facet |
Antarc* Antarctic Ice permafrost wedge* |
op_relation |
Geografiska Annaler: Series A, Physical Geography /96 (2016) http://hdl.handle.net/2122/11949 doi:10.1111/geoa.12038 |
op_rights |
restricted |
op_doi |
https://doi.org/10.1111/geoa.12038 |
container_title |
Geografiska Annaler: Series A, Physical Geography |
container_volume |
96 |
container_issue |
2 |
container_start_page |
161 |
op_container_end_page |
176 |
_version_ |
1766271570681004032 |