Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands
Sedimentological features and cluster analysis of diatom assemblages were used to investigate a local Holocene prograding sequence of marine-estuarine-lacustrine sediments. It consists of upward finning and thinning sediment cycles formed at the mouth of a meltwater stream during regional isostatic...
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Cambridge University Press (CUP)
1996
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Online Access: | http://dx.doi.org/10.1017/s095410209600048x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410209600048X |
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crcambridgeupr:10.1017/s095410209600048x 2024-03-03T08:38:56+00:00 Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands Martinez-Macchiavello, J.C. Tatur, A. Servant-Vildary, S. Del Valle, R. 1996 http://dx.doi.org/10.1017/s095410209600048x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410209600048X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 8, issue 4, page 313-322 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1996 crcambridgeupr https://doi.org/10.1017/s095410209600048x 2024-02-08T08:41:34Z Sedimentological features and cluster analysis of diatom assemblages were used to investigate a local Holocene prograding sequence of marine-estuarine-lacustrine sediments. It consists of upward finning and thinning sediment cycles formed at the mouth of a meltwater stream during regional isostatic uplift, which followed early Holocene deglaciation and marine inundation events. The sequence begins in the lower Holocene sublittoral sand (marine diatoms and abundant molluscs) overlying, with a transgressive base, the deltic (?) clastic sediment marking probably one of the pre-Holocene interglacial periods (index diatom Actinocyclus ingens suggests an age >0.62 Ma). The lower Holocene marine sand was truncated by middle Holocene gravity flows, bearing volcanic ash. They were deposited in a high energy estuarine environment (brackish diatoms). The beach subsequently formed separated the estuary from the sea and changed it into a freshwater lake. Accumulation of moss and gyttja, containing a freshwater diatom assemblage, marks the final late Holocene stage of this coastal sedimentary sequence, which can be considered as typical for deglaciation periods in the maritime Antarctic. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science King George Island South Shetland Islands Cambridge University Press Antarctic King George Island South Shetland Islands Antarctic Science 8 4 313 322 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Martinez-Macchiavello, J.C. Tatur, A. Servant-Vildary, S. Del Valle, R. Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Sedimentological features and cluster analysis of diatom assemblages were used to investigate a local Holocene prograding sequence of marine-estuarine-lacustrine sediments. It consists of upward finning and thinning sediment cycles formed at the mouth of a meltwater stream during regional isostatic uplift, which followed early Holocene deglaciation and marine inundation events. The sequence begins in the lower Holocene sublittoral sand (marine diatoms and abundant molluscs) overlying, with a transgressive base, the deltic (?) clastic sediment marking probably one of the pre-Holocene interglacial periods (index diatom Actinocyclus ingens suggests an age >0.62 Ma). The lower Holocene marine sand was truncated by middle Holocene gravity flows, bearing volcanic ash. They were deposited in a high energy estuarine environment (brackish diatoms). The beach subsequently formed separated the estuary from the sea and changed it into a freshwater lake. Accumulation of moss and gyttja, containing a freshwater diatom assemblage, marks the final late Holocene stage of this coastal sedimentary sequence, which can be considered as typical for deglaciation periods in the maritime Antarctic. |
format |
Article in Journal/Newspaper |
author |
Martinez-Macchiavello, J.C. Tatur, A. Servant-Vildary, S. Del Valle, R. |
author_facet |
Martinez-Macchiavello, J.C. Tatur, A. Servant-Vildary, S. Del Valle, R. |
author_sort |
Martinez-Macchiavello, J.C. |
title |
Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands |
title_short |
Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands |
title_full |
Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands |
title_fullStr |
Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands |
title_full_unstemmed |
Holocene environmental change in a marine-estuarine-lacustrine sediment sequence, King George Island, South Shetland Islands |
title_sort |
holocene environmental change in a marine-estuarine-lacustrine sediment sequence, king george island, south shetland islands |
publisher |
Cambridge University Press (CUP) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1017/s095410209600048x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410209600048X |
geographic |
Antarctic King George Island South Shetland Islands |
geographic_facet |
Antarctic King George Island South Shetland Islands |
genre |
Antarc* Antarctic Antarctic Science King George Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Science King George Island South Shetland Islands |
op_source |
Antarctic Science volume 8, issue 4, page 313-322 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s095410209600048x |
container_title |
Antarctic Science |
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8 |
container_issue |
4 |
container_start_page |
313 |
op_container_end_page |
322 |
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1792494324425949184 |