LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE
Most of the last glacial maximum (LGM) glacier record west of the southern Andes (40-55 degrees S) is today submerged under the Pacific Ocean and therefore the Archipielago de Chiloe (42-43 degrees S) provides an unusual opportunity to study local sediment and landform associations to help understan...
Published in: | Geografiska Annaler: Series A, Physical Geography |
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Language: | English |
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2024
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Online Access: | https://repositorio.uc.cl/handle/11534/76141 https://doi.org/10.1111/j.1468-0459.2012.00471.x |
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ftpunivcchile:oai:repositorio.uc.cl:11534/76141 2024-06-09T07:46:47+00:00 LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE Garcia, Juan L. 2024-01-10T12:06:17Z 21 páginas application/pdf https://repositorio.uc.cl/handle/11534/76141 https://doi.org/10.1111/j.1468-0459.2012.00471.x en eng TAYLOR & FRANCIS LTD doi:10.1111/j.1468-0459.2012.00471.x 1468-0459 0435-3676 https://doi.org/10.1111/j.1468-0459.2012.00471.x https://repositorio.uc.cl/handle/11534/76141 WOS:000311431900002 registro bibliográfico Patagonian ice sheet Llanquihue Glaciation glacial geomorphology Chiloe glacial landsystems GRANDE-DE-CHILOE LAKE DISTRICT ISLA-GRANDE ABRUPT VEGETATION LLANQUIHUE DRIFT NORTHERN ISLA CLIMATE CHRONOLOGY HISTORY MAXIMUM 13 Climate Action 13 Acción por el clima artículo 2024 ftpunivcchile https://doi.org/10.1111/j.1468-0459.2012.00471.x 2024-05-14T23:43:15Z Most of the last glacial maximum (LGM) glacier record west of the southern Andes (40-55 degrees S) is today submerged under the Pacific Ocean and therefore the Archipielago de Chiloe (42-43 degrees S) provides an unusual opportunity to study local sediment and landform associations to help understand paleoglacial features of the former Patagonian ice sheet (PIS). In this context, this work presents the first comprehensive glacial geomorphologic mapping of the central region of the Archipielago de Chiloe, which is located in a transitional geomorphic region between the Chilean Lake District (CLD, 39-41 degrees S, 73 degrees W) and northwest Patagonia ( 43-48 degrees S, 74 degrees W). The Chilotan glacial geomorphology and sediment associations resulted from a warm-based glacier that characterizes a typical active glacial temperate landsystem, which in central Chiloe combines deposits and landform units originated in subglacial and subaerial environments. Paleoglacial features that occur in central Chiloe are characteristic of an ice-sheet style of glaciation, which differentiates it from a typical Alpine glacial style defined previously for the CLD. Therefore, the Archipielago de Chiloe represents a geographical break point where the PIS became the large ice mass that occupied the Patagonian Andes during the last glacial period (Llanquihue Glaciation). A double ice-contact slope on the east face of the Cordillera de La Costa provides evidence for the most extensive Early Llanquihue glacial advance on Isla Grande de Chiloe. The most prominent LGM advance in the area occurred at 26 000 cal yr BP, coincident with regional stadial conditions, and is defined by a big moraine along the east coast of the island. FONDECYT Article in Journal/Newspaper Ice Sheet Pontificia Universidad Católica de Chile: Repositorio UC Patagonia Pacific De la Costa isla Grande ENVELOPE(140.025,140.025,-66.664,-66.664) Llanquihue ENVELOPE(-65.083,-65.083,-65.550,-65.550) Geografiska Annaler: Series A, Physical Geography 94 4 459 479 |
institution |
Open Polar |
collection |
Pontificia Universidad Católica de Chile: Repositorio UC |
op_collection_id |
ftpunivcchile |
language |
English |
topic |
Patagonian ice sheet Llanquihue Glaciation glacial geomorphology Chiloe glacial landsystems GRANDE-DE-CHILOE LAKE DISTRICT ISLA-GRANDE ABRUPT VEGETATION LLANQUIHUE DRIFT NORTHERN ISLA CLIMATE CHRONOLOGY HISTORY MAXIMUM 13 Climate Action 13 Acción por el clima |
spellingShingle |
Patagonian ice sheet Llanquihue Glaciation glacial geomorphology Chiloe glacial landsystems GRANDE-DE-CHILOE LAKE DISTRICT ISLA-GRANDE ABRUPT VEGETATION LLANQUIHUE DRIFT NORTHERN ISLA CLIMATE CHRONOLOGY HISTORY MAXIMUM 13 Climate Action 13 Acción por el clima Garcia, Juan L. LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE |
topic_facet |
Patagonian ice sheet Llanquihue Glaciation glacial geomorphology Chiloe glacial landsystems GRANDE-DE-CHILOE LAKE DISTRICT ISLA-GRANDE ABRUPT VEGETATION LLANQUIHUE DRIFT NORTHERN ISLA CLIMATE CHRONOLOGY HISTORY MAXIMUM 13 Climate Action 13 Acción por el clima |
description |
Most of the last glacial maximum (LGM) glacier record west of the southern Andes (40-55 degrees S) is today submerged under the Pacific Ocean and therefore the Archipielago de Chiloe (42-43 degrees S) provides an unusual opportunity to study local sediment and landform associations to help understand paleoglacial features of the former Patagonian ice sheet (PIS). In this context, this work presents the first comprehensive glacial geomorphologic mapping of the central region of the Archipielago de Chiloe, which is located in a transitional geomorphic region between the Chilean Lake District (CLD, 39-41 degrees S, 73 degrees W) and northwest Patagonia ( 43-48 degrees S, 74 degrees W). The Chilotan glacial geomorphology and sediment associations resulted from a warm-based glacier that characterizes a typical active glacial temperate landsystem, which in central Chiloe combines deposits and landform units originated in subglacial and subaerial environments. Paleoglacial features that occur in central Chiloe are characteristic of an ice-sheet style of glaciation, which differentiates it from a typical Alpine glacial style defined previously for the CLD. Therefore, the Archipielago de Chiloe represents a geographical break point where the PIS became the large ice mass that occupied the Patagonian Andes during the last glacial period (Llanquihue Glaciation). A double ice-contact slope on the east face of the Cordillera de La Costa provides evidence for the most extensive Early Llanquihue glacial advance on Isla Grande de Chiloe. The most prominent LGM advance in the area occurred at 26 000 cal yr BP, coincident with regional stadial conditions, and is defined by a big moraine along the east coast of the island. FONDECYT |
format |
Article in Journal/Newspaper |
author |
Garcia, Juan L. |
author_facet |
Garcia, Juan L. |
author_sort |
Garcia, Juan L. |
title |
LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE |
title_short |
LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE |
title_full |
LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE |
title_fullStr |
LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE |
title_full_unstemmed |
LATE PLEISTOCENE ICE FLUCTUATIONS AND GLACIAL GEOMORPHOLOGY OF THE ARCHIPIELAGO DE CHILOE, SOUTHERN CHILE |
title_sort |
late pleistocene ice fluctuations and glacial geomorphology of the archipielago de chiloe, southern chile |
publisher |
TAYLOR & FRANCIS LTD |
publishDate |
2024 |
url |
https://repositorio.uc.cl/handle/11534/76141 https://doi.org/10.1111/j.1468-0459.2012.00471.x |
long_lat |
ENVELOPE(140.025,140.025,-66.664,-66.664) ENVELOPE(-65.083,-65.083,-65.550,-65.550) |
geographic |
Patagonia Pacific De la Costa isla Grande Llanquihue |
geographic_facet |
Patagonia Pacific De la Costa isla Grande Llanquihue |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
doi:10.1111/j.1468-0459.2012.00471.x 1468-0459 0435-3676 https://doi.org/10.1111/j.1468-0459.2012.00471.x https://repositorio.uc.cl/handle/11534/76141 WOS:000311431900002 |
op_rights |
registro bibliográfico |
op_doi |
https://doi.org/10.1111/j.1468-0459.2012.00471.x |
container_title |
Geografiska Annaler: Series A, Physical Geography |
container_volume |
94 |
container_issue |
4 |
container_start_page |
459 |
op_container_end_page |
479 |
_version_ |
1801376776585216000 |