Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands
The first Holocene marine transgression reached the inner fiords of King George Island approximately at 9.5 ka BP according to Sugden and John (1973). This age marks today the minimum age of the end of the last glacial period obtained on land and the start of the Holocene in this Antarctic sector. F...
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Alfred Wegener Institute for Polar and Marine Research
2015
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Online Access: | http://epic.awi.de/38539/1/BzPM_0690_2015.pdf https://epic.awi.de/id/eprint/46287/ https://epic.awi.de/id/eprint/46287/1/Heredia_etal_2015.pdf https://hdl.handle.net/10013/epic.8ad3b44f-7e28-468e-9fb0-affd9ec6de64 |
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ftawi:oai:epic.awi.de:46287 2024-09-15T17:47:09+00:00 Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands Heredia Barión, Pablo Strelin, Jorge Kuhn, Gerhard 2015 application/pdf http://epic.awi.de/38539/1/BzPM_0690_2015.pdf https://epic.awi.de/id/eprint/46287/ https://epic.awi.de/id/eprint/46287/1/Heredia_etal_2015.pdf https://hdl.handle.net/10013/epic.8ad3b44f-7e28-468e-9fb0-affd9ec6de64 unknown Alfred Wegener Institute for Polar and Marine Research https://epic.awi.de/id/eprint/46287/1/Heredia_etal_2015.pdf Heredia Barión, P. , Strelin, J. and Kuhn, G. orcid:0000-0001-6069-7485 (2015) Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands , Berichte zur Polar- und Meeresforschung, 690 , p. 61 . hdl:10013/epic.8ad3b44f-7e28-468e-9fb0-affd9ec6de64 EPIC3Berichte zur Polar- und Meeresforschung, Alfred Wegener Institute for Polar and Marine Research, 690, pp. 61-61, ISSN: 1618-3193 Article notRev 2015 ftawi 2024-06-24T04:18:50Z The first Holocene marine transgression reached the inner fiords of King George Island approximately at 9.5 ka BP according to Sugden and John (1973). This age marks today the minimum age of the end of the last glacial period obtained on land and the start of the Holocene in this Antarctic sector. Following the first Holocene marine transgression, Watcham et al. (2011) reconstructed a relative sea level curve for the South Shetland Islands with a relative sea level rise of 15.5 m amsl for Fildes Peninsula between 8 and 7 ka BP. The curve shows that a delay occurred in the isostatic uplift after 7.2 ka BP related to a glacier still-stand resulting in a relative sea level rise. This is followed by a drop of the relative sea level after 7 ka BP due to the rate of glacial unloading and isostatic rebound exceeding the rate of eustatic sea level rise. The aim of this presentation is to show new evidence, which will help to understand the postglacial paleoenvironmental changes on King George Island. Our chrono-stratigraphical and geomorphological studies in Potter Peninsula suggest, that the Holocene post-glacial marine transgression was not just initiated before 7.7 ka BP but also reached 14 m amsl, and was locally interrupted by a glacier advance after 7.3 ka BP. This glacier advance can be correlated to Watcham´s et al (2011) curve, showing a drop of relative sea level between 7.2 and 7 ka BP. In conclusion, we consider that a glacier readvance took place between 7.2 and 7 ka BP in the Southern sector of King George Island. Additionally our findings show that the age of 9.5 ka BP as a minimum age of the onset of the Holocene transgression in the South Shetland Islands has to be reconsidered. References Sugden, D. and John, B., 1973. The age of glacier fluctuations in the South Shetland Islands,Antarctica. In: van Zinderen Bakker, E.M. (Ed.), Palaeoecology of Africa, the Surrounding Islands, and Antarctica. A.A. Balkema, 139-159 p., Cape Town. Watcham, E. P., Bentley, M. J., Hodgson, D. A., Roberts, S. J., Fretwell, ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Berichte zur Polar- und Meeresforschung King George Island South Shetland Islands Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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The first Holocene marine transgression reached the inner fiords of King George Island approximately at 9.5 ka BP according to Sugden and John (1973). This age marks today the minimum age of the end of the last glacial period obtained on land and the start of the Holocene in this Antarctic sector. Following the first Holocene marine transgression, Watcham et al. (2011) reconstructed a relative sea level curve for the South Shetland Islands with a relative sea level rise of 15.5 m amsl for Fildes Peninsula between 8 and 7 ka BP. The curve shows that a delay occurred in the isostatic uplift after 7.2 ka BP related to a glacier still-stand resulting in a relative sea level rise. This is followed by a drop of the relative sea level after 7 ka BP due to the rate of glacial unloading and isostatic rebound exceeding the rate of eustatic sea level rise. The aim of this presentation is to show new evidence, which will help to understand the postglacial paleoenvironmental changes on King George Island. Our chrono-stratigraphical and geomorphological studies in Potter Peninsula suggest, that the Holocene post-glacial marine transgression was not just initiated before 7.7 ka BP but also reached 14 m amsl, and was locally interrupted by a glacier advance after 7.3 ka BP. This glacier advance can be correlated to Watcham´s et al (2011) curve, showing a drop of relative sea level between 7.2 and 7 ka BP. In conclusion, we consider that a glacier readvance took place between 7.2 and 7 ka BP in the Southern sector of King George Island. Additionally our findings show that the age of 9.5 ka BP as a minimum age of the onset of the Holocene transgression in the South Shetland Islands has to be reconsidered. References Sugden, D. and John, B., 1973. The age of glacier fluctuations in the South Shetland Islands,Antarctica. In: van Zinderen Bakker, E.M. (Ed.), Palaeoecology of Africa, the Surrounding Islands, and Antarctica. A.A. Balkema, 139-159 p., Cape Town. Watcham, E. P., Bentley, M. J., Hodgson, D. A., Roberts, S. J., Fretwell, ... |
format |
Article in Journal/Newspaper |
author |
Heredia Barión, Pablo Strelin, Jorge Kuhn, Gerhard |
spellingShingle |
Heredia Barión, Pablo Strelin, Jorge Kuhn, Gerhard Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands |
author_facet |
Heredia Barión, Pablo Strelin, Jorge Kuhn, Gerhard |
author_sort |
Heredia Barión, Pablo |
title |
Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands |
title_short |
Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands |
title_full |
Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands |
title_fullStr |
Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands |
title_full_unstemmed |
Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands |
title_sort |
paleoenvironmental evolution of potter peninsula during the holocene, king george island, south shetland islands |
publisher |
Alfred Wegener Institute for Polar and Marine Research |
publishDate |
2015 |
url |
http://epic.awi.de/38539/1/BzPM_0690_2015.pdf https://epic.awi.de/id/eprint/46287/ https://epic.awi.de/id/eprint/46287/1/Heredia_etal_2015.pdf https://hdl.handle.net/10013/epic.8ad3b44f-7e28-468e-9fb0-affd9ec6de64 |
genre |
Antarc* Antarctic Antarctica Berichte zur Polar- und Meeresforschung King George Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Berichte zur Polar- und Meeresforschung King George Island South Shetland Islands |
op_source |
EPIC3Berichte zur Polar- und Meeresforschung, Alfred Wegener Institute for Polar and Marine Research, 690, pp. 61-61, ISSN: 1618-3193 |
op_relation |
https://epic.awi.de/id/eprint/46287/1/Heredia_etal_2015.pdf Heredia Barión, P. , Strelin, J. and Kuhn, G. orcid:0000-0001-6069-7485 (2015) Paleoenvironmental Evolution of Potter Peninsula during the Holocene, King George Island, South Shetland Islands , Berichte zur Polar- und Meeresforschung, 690 , p. 61 . hdl:10013/epic.8ad3b44f-7e28-468e-9fb0-affd9ec6de64 |
_version_ |
1810495867919007744 |