Eocene microplankton from La Meseta Formation, northern Seymour Island
Twenty two samples collected from the Tertiary La Meseta Formation of Cape Wiman, Seymour Island, Antarctic Peninsula yielded abundant and moderately diverse assemblages of marine palynoflora, dominated by dinoflagellate cysts, together with acritarchs and chlorophyta. The assemblages can be divided...
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Language: | English |
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Cambridge University Press (CUP)
1992
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Online Access: | http://dx.doi.org/10.1017/s0954102092000506 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102092000506 |
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crcambridgeupr:10.1017/s0954102092000506 2024-03-03T08:38:55+00:00 Eocene microplankton from La Meseta Formation, northern Seymour Island Cocozza, Christopher D. Clarke, Ciara M. 1992 http://dx.doi.org/10.1017/s0954102092000506 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102092000506 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 4, issue 3, page 355-362 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1992 crcambridgeupr https://doi.org/10.1017/s0954102092000506 2024-02-08T08:33:50Z Twenty two samples collected from the Tertiary La Meseta Formation of Cape Wiman, Seymour Island, Antarctic Peninsula yielded abundant and moderately diverse assemblages of marine palynoflora, dominated by dinoflagellate cysts, together with acritarchs and chlorophyta. The assemblages can be divided into three association: Association 1, characterized by low diversity dinoflagellate assemblage of late Early Eocene age which are dominated by Enigmadinium cylindrifloriferum Association 2 characterized by more diverse dinoflagellate cyst assemblages, which show a marked decrease in the dominance of E. cylindrifloriferum , and an increase in relative abundance of Areosphaeridium cf. diktyoplokus and Association 3 which is characterized by a decrease in dinoflagellate cyst diversity up section. Changes in dinoflagellate cyst dominance and diversity throughout the section suggests a gradation from a stressed, shallow marine palaeoenvironment to a more open near-shore, shallow marine system becoming progressively more nearshore up section. The assemblages are no older than late Early Eocene in age, and possibly as young as Mid–Late Eocene. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Seymour Island Cambridge University Press Antarctic Antarctic Peninsula Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Cape Wiman ENVELOPE(-56.633,-56.633,-64.217,-64.217) Antarctic Science 4 3 355 362 |
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 Cocozza, Christopher D. Clarke, Ciara M. Eocene microplankton from La Meseta Formation, northern Seymour Island |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Twenty two samples collected from the Tertiary La Meseta Formation of Cape Wiman, Seymour Island, Antarctic Peninsula yielded abundant and moderately diverse assemblages of marine palynoflora, dominated by dinoflagellate cysts, together with acritarchs and chlorophyta. The assemblages can be divided into three association: Association 1, characterized by low diversity dinoflagellate assemblage of late Early Eocene age which are dominated by Enigmadinium cylindrifloriferum Association 2 characterized by more diverse dinoflagellate cyst assemblages, which show a marked decrease in the dominance of E. cylindrifloriferum , and an increase in relative abundance of Areosphaeridium cf. diktyoplokus and Association 3 which is characterized by a decrease in dinoflagellate cyst diversity up section. Changes in dinoflagellate cyst dominance and diversity throughout the section suggests a gradation from a stressed, shallow marine palaeoenvironment to a more open near-shore, shallow marine system becoming progressively more nearshore up section. The assemblages are no older than late Early Eocene in age, and possibly as young as Mid–Late Eocene. |
format |
Article in Journal/Newspaper |
author |
Cocozza, Christopher D. Clarke, Ciara M. |
author_facet |
Cocozza, Christopher D. Clarke, Ciara M. |
author_sort |
Cocozza, Christopher D. |
title |
Eocene microplankton from La Meseta Formation, northern Seymour Island |
title_short |
Eocene microplankton from La Meseta Formation, northern Seymour Island |
title_full |
Eocene microplankton from La Meseta Formation, northern Seymour Island |
title_fullStr |
Eocene microplankton from La Meseta Formation, northern Seymour Island |
title_full_unstemmed |
Eocene microplankton from La Meseta Formation, northern Seymour Island |
title_sort |
eocene microplankton from la meseta formation, northern seymour island |
publisher |
Cambridge University Press (CUP) |
publishDate |
1992 |
url |
http://dx.doi.org/10.1017/s0954102092000506 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102092000506 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-56.633,-56.633,-64.217,-64.217) |
geographic |
Antarctic Antarctic Peninsula Seymour Seymour Island Cape Wiman |
geographic_facet |
Antarctic Antarctic Peninsula Seymour Seymour Island Cape Wiman |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Seymour Island |
op_source |
Antarctic Science volume 4, issue 3, page 355-362 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102092000506 |
container_title |
Antarctic Science |
container_volume |
4 |
container_issue |
3 |
container_start_page |
355 |
op_container_end_page |
362 |
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1792507405743947776 |