Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica
Abstract The chronostratigraphy of the sedimentary record of Limnopolar Lake, located on Byers Peninsula (Livingston Island, South Shetland Islands, Maritime Antarctica), is described based on radionuclides and radiocarbon age dating. The oldest moss macrofossil age was 6700±50 yr bp (7510±80 cal yr...
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Online Access: | http://dx.doi.org/10.1017/s0954102012000788 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012000788 |
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crcambridgeupr:10.1017/s0954102012000788 2024-06-23T07:47:45+00:00 Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica Toro, Manuel Granados, Ignacio Pla, Sergi Giralt, Santiago Antoniades, Dermot Galán, Luis Cortizas, Antonio Martínez Lim, Hyoun Soo Appleby, Peter G. 2013 http://dx.doi.org/10.1017/s0954102012000788 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012000788 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 25, issue 2, page 198-212 ISSN 0954-1020 1365-2079 journal-article 2013 crcambridgeupr https://doi.org/10.1017/s0954102012000788 2024-06-05T04:03:08Z Abstract The chronostratigraphy of the sedimentary record of Limnopolar Lake, located on Byers Peninsula (Livingston Island, South Shetland Islands, Maritime Antarctica), is described based on radionuclides and radiocarbon age dating. The oldest moss macrofossil age was 6700±50 yr bp (7510±80 cal yr bp ) from which the age/depth model estimates a basal age for the sedimentary record of c. 8300 cal yr bp , suggesting an earlier deglaciation of Byers Peninsula than reported in previous studies. Lithological units and other stratigraphic zones are described throughout the sediment core, showing different mineralogical composition and a fine alternation of clays and silty clays and moss layers of Drepanocladus longifolius. Based on magnetic susceptibility analyses, a number of probable primary and reworked tephra layers were identified, seven of them confirmed by SEM observations, and most of them in agreement with the regional tephrachronology stratigraphy for the north-west Antarctic Peninsula. Sedimentation rates showed no significant changes during the last 5000 years with the exception of an abrupt event that took place around 5400 cal yr bp , which implied the sedimentation of c. 30 cm of clays in a very short time, probably related to a period of glacial re-advance that caused abrupt changes in geomorphological processes in the catchment. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Livingston Island South Shetland Islands Cambridge University Press Antarctic Antarctic Peninsula Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Byers peninsula ENVELOPE(-61.066,-61.066,-62.633,-62.633) Limnopolar Lake ENVELOPE(-61.098,-61.098,-62.633,-62.633) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) South Shetland Islands Antarctic Science 25 2 198 212 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract The chronostratigraphy of the sedimentary record of Limnopolar Lake, located on Byers Peninsula (Livingston Island, South Shetland Islands, Maritime Antarctica), is described based on radionuclides and radiocarbon age dating. The oldest moss macrofossil age was 6700±50 yr bp (7510±80 cal yr bp ) from which the age/depth model estimates a basal age for the sedimentary record of c. 8300 cal yr bp , suggesting an earlier deglaciation of Byers Peninsula than reported in previous studies. Lithological units and other stratigraphic zones are described throughout the sediment core, showing different mineralogical composition and a fine alternation of clays and silty clays and moss layers of Drepanocladus longifolius. Based on magnetic susceptibility analyses, a number of probable primary and reworked tephra layers were identified, seven of them confirmed by SEM observations, and most of them in agreement with the regional tephrachronology stratigraphy for the north-west Antarctic Peninsula. Sedimentation rates showed no significant changes during the last 5000 years with the exception of an abrupt event that took place around 5400 cal yr bp , which implied the sedimentation of c. 30 cm of clays in a very short time, probably related to a period of glacial re-advance that caused abrupt changes in geomorphological processes in the catchment. |
format |
Article in Journal/Newspaper |
author |
Toro, Manuel Granados, Ignacio Pla, Sergi Giralt, Santiago Antoniades, Dermot Galán, Luis Cortizas, Antonio Martínez Lim, Hyoun Soo Appleby, Peter G. |
spellingShingle |
Toro, Manuel Granados, Ignacio Pla, Sergi Giralt, Santiago Antoniades, Dermot Galán, Luis Cortizas, Antonio Martínez Lim, Hyoun Soo Appleby, Peter G. Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica |
author_facet |
Toro, Manuel Granados, Ignacio Pla, Sergi Giralt, Santiago Antoniades, Dermot Galán, Luis Cortizas, Antonio Martínez Lim, Hyoun Soo Appleby, Peter G. |
author_sort |
Toro, Manuel |
title |
Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica |
title_short |
Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica |
title_full |
Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica |
title_fullStr |
Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica |
title_full_unstemmed |
Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica |
title_sort |
chronostratigraphy of the sedimentary record of limnopolar lake, byers peninsula, livingston island, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1017/s0954102012000788 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012000788 |
long_lat |
ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-61.066,-61.066,-62.633,-62.633) ENVELOPE(-61.098,-61.098,-62.633,-62.633) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Byers Byers peninsula Limnopolar Lake Livingston Island South Shetland Islands |
geographic_facet |
Antarctic Antarctic Peninsula Byers Byers peninsula Limnopolar Lake Livingston Island South Shetland Islands |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Livingston Island South Shetland Islands |
op_source |
Antarctic Science volume 25, issue 2, page 198-212 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102012000788 |
container_title |
Antarctic Science |
container_volume |
25 |
container_issue |
2 |
container_start_page |
198 |
op_container_end_page |
212 |
_version_ |
1802651906548432896 |