Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica
Abstract Here we describe new microfossil assemblages for the Miocene Hobbs Glacier Formation and the first possibly indigenous assemblages for the Plio-Pleistocene Weddell Sea Formation on Seymour Island, West Antarctica. The assemblages are composed mainly of foraminifers, but radiolarians, calcit...
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Online Access: | http://dx.doi.org/10.1017/s0954102019000294 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000294 |
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crcambridgeupr:10.1017/s0954102019000294 2024-03-03T08:38:05+00:00 Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica Badaró, Victor C.S. Petri, Setembrino 2019 http://dx.doi.org/10.1017/s0954102019000294 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000294 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms https://www.cambridge.org/core/terms Antarctic Science volume 31, issue 5, page 254-262 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2019 crcambridgeupr https://doi.org/10.1017/s0954102019000294 2024-02-08T08:31:53Z Abstract Here we describe new microfossil assemblages for the Miocene Hobbs Glacier Formation and the first possibly indigenous assemblages for the Plio-Pleistocene Weddell Sea Formation on Seymour Island, West Antarctica. The assemblages are composed mainly of foraminifers, but radiolarians, calcitarchs and poriferan sclerites are also present. For the Hobbs Glacier Formation, we report the foraminifers Bolivina sp., Oolina globosa and Rosalina cf. globularis and for the Weddell Sea Formation, we report Favulina hexagona , Globigerinita uvula , Globocassidulina cf. subglobosa and Psammosphaera fusca . The low abundance and diversity of microfossils, allied with the complex taphonomical processes that prevailed in Antarctic glacial–marine palaeoenvironments, make it impossible to define whether the assemblages are composed of a mixture of indigenous and re-elaborated specimens or exclusively of re-elaborated remains. Nevertheless, the indigenous nature of some specimens is suggested by their inherent fragility, excellent preservation and/or taxonomic association with indigenous assemblages from correlated strata. The taxonomic compositions are not directly comparable with other Antarctic assemblages, although most of the species were previously reported from pre-Quaternary or modern deposits of both West and East Antarctica. This lack of correspondence is probably due to preservation biases, but any further significance is hidden by the complex taphonomy of the deposits. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica East Antarctica Seymour Island Weddell Sea West Antarctica Cambridge University Press Antarctic Weddell Sea East Antarctica West Antarctica Weddell Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Hobbs ENVELOPE(-57.500,-57.500,-64.300,-64.300) Antarctic Science 31 5 254 262 |
institution |
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 Badaró, Victor C.S. Petri, Setembrino Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Here we describe new microfossil assemblages for the Miocene Hobbs Glacier Formation and the first possibly indigenous assemblages for the Plio-Pleistocene Weddell Sea Formation on Seymour Island, West Antarctica. The assemblages are composed mainly of foraminifers, but radiolarians, calcitarchs and poriferan sclerites are also present. For the Hobbs Glacier Formation, we report the foraminifers Bolivina sp., Oolina globosa and Rosalina cf. globularis and for the Weddell Sea Formation, we report Favulina hexagona , Globigerinita uvula , Globocassidulina cf. subglobosa and Psammosphaera fusca . The low abundance and diversity of microfossils, allied with the complex taphonomical processes that prevailed in Antarctic glacial–marine palaeoenvironments, make it impossible to define whether the assemblages are composed of a mixture of indigenous and re-elaborated specimens or exclusively of re-elaborated remains. Nevertheless, the indigenous nature of some specimens is suggested by their inherent fragility, excellent preservation and/or taxonomic association with indigenous assemblages from correlated strata. The taxonomic compositions are not directly comparable with other Antarctic assemblages, although most of the species were previously reported from pre-Quaternary or modern deposits of both West and East Antarctica. This lack of correspondence is probably due to preservation biases, but any further significance is hidden by the complex taphonomy of the deposits. |
format |
Article in Journal/Newspaper |
author |
Badaró, Victor C.S. Petri, Setembrino |
author_facet |
Badaró, Victor C.S. Petri, Setembrino |
author_sort |
Badaró, Victor C.S. |
title |
Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica |
title_short |
Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica |
title_full |
Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica |
title_fullStr |
Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica |
title_full_unstemmed |
Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica |
title_sort |
miocene and plio-pleistocene foraminiferal assemblages from seymour island, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/s0954102019000294 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000294 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-57.500,-57.500,-64.300,-64.300) |
geographic |
Antarctic Weddell Sea East Antarctica West Antarctica Weddell Seymour Seymour Island Hobbs |
geographic_facet |
Antarctic Weddell Sea East Antarctica West Antarctica Weddell Seymour Seymour Island Hobbs |
genre |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Seymour Island Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Seymour Island Weddell Sea West Antarctica |
op_source |
Antarctic Science volume 31, issue 5, page 254-262 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102019000294 |
container_title |
Antarctic Science |
container_volume |
31 |
container_issue |
5 |
container_start_page |
254 |
op_container_end_page |
262 |
_version_ |
1792504438219341824 |