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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Publicado:	2016
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v43_n2_p151_Torres 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	paper:paper_07187092_v43_n2_p151_Torres
record_format	dspace
spelling	paper:paper_07187092_v43_n2_p151_Torres2023-06-08T15:43:18Z Palynological evidence of the geoecological belts dynamics from Eastern Cordillera of NW Argentina (23° S) during the Pre-Last Glacial Maximum 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. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v43_n2_p151_Torres 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 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.
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
publishDate	2016
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v43_n2_p151_Torres http://hdl.handle.net/20.500.12110/paper_07187092_v43_n2_p151_Torres
_version_	1768542181446909952

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

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