Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum

This paper presents the first palynological record for the dynamics of geoecological belts of the Eastern Cordillera in northwestern Argentina prior to the Last Glacial Maximum (LGM). The study was carried out on a 5-m deep sedimentary core raised at Laguna Blanca (23°09’S, 65°12’W; 4,256 m a.s.l.),...

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Autores principales: Torres, G.R., Lupo, L.C., Kulemeyer, J.J., Pérez, C.F.
Formato: JOUR
Materias:
Eastern cordillera
Geoecological belts
Jujuy
Laguna blanca
Pollen
Pre last glacial maximum
environmental change
geochronology
geological record
Last Glacial Maximum
paleoclimate
paleoenvironment
paleotemperature
palynology
Pleistocene
sediment core
vegetation history
Argentina
Laguna Blanca National Park
Neuquen
Puna
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07187092_v43_n2_p151_Torres
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_07187092_v43_n2_p151_Torres
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spelling todo:paper_07187092_v43_n2_p151_Torres2023-10-03T15:36:44Z Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum Torres, G.R. Lupo, L.C. Kulemeyer, J.J. Pérez, C.F. Eastern cordillera Geoecological belts Jujuy Laguna blanca Pollen Pre last glacial maximum environmental change geochronology geological record Last Glacial Maximum paleoclimate paleoenvironment paleotemperature palynology Pleistocene sediment core vegetation history Argentina Jujuy Laguna Blanca National Park Neuquen Puna This paper presents the first palynological record for the dynamics of geoecological belts of the Eastern Cordillera in northwestern Argentina prior to the Last Glacial Maximum (LGM). The study was carried out on a 5-m deep sedimentary core raised at Laguna Blanca (23°09’S, 65°12’W; 4,256 m a.s.l.), province of Jujuy. The geochronol­ogy was based on three14C dating by AMS method. Results show the sensitive response of the geoecological belts to temperature and effective moisture variations from ca. 29,000 to ca. 25,000 cal. years BP. The High Andean belt probably suffered an altitudinal descent forced by intense cold climate conditions ca. 29,000 cal. years BP, and may have reached a comparable distribution to the present one on 26,300 cal. years BP, favored by a milder climate. The Puna belt did not suffer great changes, since it remained with low representation in the pollen spectrum. High percentages of tree species from the Yungas ca. 29,000 cal. years BP are probably a response to the intensification of anabatic winds ascending the slope of the Sub-Andean Range towards the Eastern Cordillera. These results represent an important contribution to the paleoenvironmental discussion of the Late Pleistocene for the northwestern Argentina, where the available information on vegetation history is scarce. © 2016, Servicio Nacional de Geologia y Mineria. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07187092_v43_n2_p151_Torres
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Eastern cordillera
Geoecological belts
Jujuy
Laguna blanca
Pollen
Pre last glacial maximum
environmental change
geochronology
geological record
Last Glacial Maximum
paleoclimate
paleoenvironment
paleotemperature
palynology
Pleistocene
sediment core
vegetation history
Argentina
Jujuy
Laguna Blanca National Park
Neuquen
Puna
spellingShingle Eastern cordillera
Geoecological belts
Jujuy
Laguna blanca
Pollen
Pre last glacial maximum
environmental change
geochronology
geological record
Last Glacial Maximum
paleoclimate
paleoenvironment
paleotemperature
palynology
Pleistocene
sediment core
vegetation history
Argentina
Jujuy
Laguna Blanca National Park
Neuquen
Puna
Torres, G.R.
Lupo, L.C.
Kulemeyer, J.J.
Pérez, C.F.
Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum
topic_facet Eastern cordillera
Geoecological belts
Jujuy
Laguna blanca
Pollen
Pre last glacial maximum
environmental change
geochronology
geological record
Last Glacial Maximum
paleoclimate
paleoenvironment
paleotemperature
palynology
Pleistocene
sediment core
vegetation history
Argentina
Jujuy
Laguna Blanca National Park
Neuquen
Puna
description This paper presents the first palynological record for the dynamics of geoecological belts of the Eastern Cordillera in northwestern Argentina prior to the Last Glacial Maximum (LGM). The study was carried out on a 5-m deep sedimentary core raised at Laguna Blanca (23°09’S, 65°12’W; 4,256 m a.s.l.), province of Jujuy. The geochronol­ogy was based on three14C dating by AMS method. Results show the sensitive response of the geoecological belts to temperature and effective moisture variations from ca. 29,000 to ca. 25,000 cal. years BP. The High Andean belt probably suffered an altitudinal descent forced by intense cold climate conditions ca. 29,000 cal. years BP, and may have reached a comparable distribution to the present one on 26,300 cal. years BP, favored by a milder climate. The Puna belt did not suffer great changes, since it remained with low representation in the pollen spectrum. High percentages of tree species from the Yungas ca. 29,000 cal. years BP are probably a response to the intensification of anabatic winds ascending the slope of the Sub-Andean Range towards the Eastern Cordillera. These results represent an important contribution to the paleoenvironmental discussion of the Late Pleistocene for the northwestern Argentina, where the available information on vegetation history is scarce. © 2016, Servicio Nacional de Geologia y Mineria. All rights reserved.
format JOUR
author Torres, G.R.
Lupo, L.C.
Kulemeyer, J.J.
Pérez, C.F.
author_facet Torres, G.R.
Lupo, L.C.
Kulemeyer, J.J.
Pérez, C.F.
author_sort Torres, G.R.
title Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum
title_short Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum
title_full Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum
title_fullStr Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum
title_full_unstemmed Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum
title_sort palynological evidence of the geoecological belts dynamics from eastern cordillera of nw argentina (23° s) during the pre-last glacial maximum
url http://hdl.handle.net/20.500.12110/paper_07187092_v43_n2_p151_Torres
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AT kulemeyerjj palynologicalevidenceofthegeoecologicalbeltsdynamicsfromeasterncordilleraofnwargentina23sduringtheprelastglacialmaximum
AT perezcf palynologicalevidenceofthegeoecologicalbeltsdynamicsfromeasterncordilleraofnwargentina23sduringtheprelastglacialmaximum
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