Late- Pleistocene Wedge Structures Along The Patagonian Coast (Argentina): Chronological Constraints And Palaeo-Environmental Implications

Autores
Ribolini, Adriano; Bini, Monica; Consoloni, Ilaria; Isola, Ilaria; Pappalardo, Marta; Zanchetta, Giovanni; Fucks, Enrique; Panzeri, Laura; Martini, Marco; Terrasi, Filippo
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión enviada
Descripción
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 kyrbp, while wedge-fill sediments are OSL dated to 14 670 ± 750 yrbp. 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.
Materia
Geología
Late-Pleistocene
Wedge Structures
marine sediments
glass shards
Antarctic Cold Reversal period
Last Glacial Maximum
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
CIC Digital (CICBA)
Institución
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
OAI Identificador
oai:digital.cic.gba.gob.ar:11746/5956
Acceder
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oai_identifier_str oai:digital.cic.gba.gob.ar:11746/5956
network_acronym_str CICBA
repository_id_str 9441
network_name_str CIC Digital (CICBA)
spelling Late- Pleistocene Wedge Structures Along The Patagonian Coast (Argentina): Chronological Constraints And Palaeo-Environmental ImplicationsRibolini, AdrianoBini, MonicaConsoloni, IlariaIsola, IlariaPappalardo, MartaZanchetta, GiovanniFucks, EnriquePanzeri, LauraMartini, MarcoTerrasi, FilippoGeologíaLate-PleistoceneWedge Structuresmarine sedimentsglass shardsAntarctic Cold Reversal periodLast Glacial MaximumThis 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 kyrbp, while wedge-fill sediments are OSL dated to 14 670 ± 750 yrbp. 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.2014-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/submittedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://digital.cic.gba.gob.ar/handle/11746/5956enginfo:eu-repo/semantics/altIdentifier/doi/10.1111/geoa.12038Patagonian Coast (Argentina)info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/reponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-04T09:43:56Zoai:digital.cic.gba.gob.ar:11746/5956Institucionalhttp://digital.cic.gba.gob.arOrganismo científico-tecnológicoNo correspondehttp://digital.cic.gba.gob.ar/oai/snrdmarisa.degiusti@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:94412025-09-04 09:43:57.228CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse
dc.title.none.fl_str_mv Late- Pleistocene Wedge Structures Along The Patagonian Coast (Argentina): Chronological Constraints And Palaeo-Environmental Implications
title Late- Pleistocene Wedge Structures Along The Patagonian Coast (Argentina): Chronological Constraints And Palaeo-Environmental Implications
spellingShingle Late- Pleistocene Wedge Structures Along The Patagonian Coast (Argentina): Chronological Constraints And Palaeo-Environmental Implications
Ribolini, Adriano
Geología
Late-Pleistocene
Wedge Structures
marine sediments
glass shards
Antarctic Cold Reversal period
Last Glacial Maximum
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
dc.creator.none.fl_str_mv Ribolini, Adriano
Bini, Monica
Consoloni, Ilaria
Isola, Ilaria
Pappalardo, Marta
Zanchetta, Giovanni
Fucks, Enrique
Panzeri, Laura
Martini, Marco
Terrasi, Filippo
author Ribolini, Adriano
author_facet Ribolini, Adriano
Bini, Monica
Consoloni, Ilaria
Isola, Ilaria
Pappalardo, Marta
Zanchetta, Giovanni
Fucks, Enrique
Panzeri, Laura
Martini, Marco
Terrasi, Filippo
author_role author
author2 Bini, Monica
Consoloni, Ilaria
Isola, Ilaria
Pappalardo, Marta
Zanchetta, Giovanni
Fucks, Enrique
Panzeri, Laura
Martini, Marco
Terrasi, Filippo
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Geología
Late-Pleistocene
Wedge Structures
marine sediments
glass shards
Antarctic Cold Reversal period
Last Glacial Maximum
topic Geología
Late-Pleistocene
Wedge Structures
marine sediments
glass shards
Antarctic Cold Reversal period
Last Glacial Maximum
dc.description.none.fl_txt_mv 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 kyrbp, while wedge-fill sediments are OSL dated to 14 670 ± 750 yrbp. 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.
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 kyrbp, while wedge-fill sediments are OSL dated to 14 670 ± 750 yrbp. 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.
publishDate 2014
dc.date.none.fl_str_mv 2014-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/submittedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv https://digital.cic.gba.gob.ar/handle/11746/5956
url https://digital.cic.gba.gob.ar/handle/11746/5956
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/geoa.12038
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv Patagonian Coast (Argentina)
dc.source.none.fl_str_mv reponame:CIC Digital (CICBA)
instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
instacron:CICBA
reponame_str CIC Digital (CICBA)
collection CIC Digital (CICBA)
instname_str Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
instacron_str CICBA
institution CICBA
repository.name.fl_str_mv CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
repository.mail.fl_str_mv marisa.degiusti@sedici.unlp.edu.ar
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score 12.623145

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