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: | https://hdl.handle.net/11568/401267 https://doi.org/10.1111/geoa.12038 https://www.tandfonline.com/doi/full/10.1111/geoa.12038 |
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ftunivpisairis:oai:arpi.unipi.it:11568/401267 2024-02-27T08:35:14+00:00 Late-Pleistocene Wedge Structures Along the Patagonian Coast (Argentina): Chronological Constraints and Palaeo-Environmental Implications RIBOLINI, ADRIANO BINI, MONICA CONSOLONI, ILARIA Ilaria Isola PAPPALARDO, MARTA ZANCHETTA, GIOVANNI Enrique Fucks Laura Panzeri Marco Martini Filippo Terrasi Ribolini, Adriano Bini, Monica Consoloni, Ilaria Ilaria, Isola Pappalardo, Marta Zanchetta, Giovanni Enrique, Fuck Laura, Panzeri Marco, Martini Filippo, Terrasi 2014 https://hdl.handle.net/11568/401267 https://doi.org/10.1111/geoa.12038 https://www.tandfonline.com/doi/full/10.1111/geoa.12038 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000337530500004 volume:96 issue:2 firstpage:161 lastpage:176 numberofpages:16 journal:GEOGRAFISKA ANNALER. SERIES A, PHYSICAL GEOGRAPHY https://hdl.handle.net/11568/401267 doi:10.1111/geoa.12038 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84901837403 https://www.tandfonline.com/doi/full/10.1111/geoa.12038 info:eu-repo/semantics/openAccess info:eu-repo/semantics/article 2014 ftunivpisairis https://doi.org/10.1111/geoa.12038 2024-01-31T17:51:49Z 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. Article in Journal/Newspaper Antarc* Antarctic permafrost wedge* ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic The Antarctic Patagonia Argentina Geografiska Annaler: Series A, Physical Geography 96 2 161 176 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
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. |
author2 |
Ribolini, Adriano Bini, Monica Consoloni, Ilaria Ilaria, Isola Pappalardo, Marta Zanchetta, Giovanni Enrique, Fuck Laura, Panzeri Marco, Martini Filippo, Terrasi |
format |
Article in Journal/Newspaper |
author |
RIBOLINI, ADRIANO BINI, MONICA CONSOLONI, ILARIA Ilaria Isola PAPPALARDO, MARTA ZANCHETTA, GIOVANNI Enrique Fucks Laura Panzeri Marco Martini Filippo Terrasi |
spellingShingle |
RIBOLINI, ADRIANO BINI, MONICA CONSOLONI, ILARIA Ilaria Isola PAPPALARDO, MARTA ZANCHETTA, GIOVANNI Enrique Fucks Laura Panzeri Marco Martini Filippo Terrasi Late-Pleistocene Wedge Structures Along the Patagonian Coast (Argentina): Chronological Constraints and Palaeo-Environmental Implications |
author_facet |
RIBOLINI, ADRIANO BINI, MONICA CONSOLONI, ILARIA Ilaria Isola PAPPALARDO, MARTA ZANCHETTA, GIOVANNI Enrique Fucks Laura Panzeri Marco Martini Filippo Terrasi |
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 |
2014 |
url |
https://hdl.handle.net/11568/401267 https://doi.org/10.1111/geoa.12038 https://www.tandfonline.com/doi/full/10.1111/geoa.12038 |
geographic |
Antarctic The Antarctic Patagonia Argentina |
geographic_facet |
Antarctic The Antarctic Patagonia Argentina |
genre |
Antarc* Antarctic permafrost wedge* |
genre_facet |
Antarc* Antarctic permafrost wedge* |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000337530500004 volume:96 issue:2 firstpage:161 lastpage:176 numberofpages:16 journal:GEOGRAFISKA ANNALER. SERIES A, PHYSICAL GEOGRAPHY https://hdl.handle.net/11568/401267 doi:10.1111/geoa.12038 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84901837403 https://www.tandfonline.com/doi/full/10.1111/geoa.12038 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
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