Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands
A terrestrial sequence on Livingston Island, South Shetland Islands, known as the Williams Point Beds contains a well-preserved, diverse fossil flora previously assigned a Triassic age. Because of their supposed age, volcanic provenance and evidence for active volcanism, the Williams Point Beds have...
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Cambridge University Press
1989
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Online Access: | http://nora.nerc.ac.uk/id/eprint/521322/ https://doi.org/10.1017/S0954102089000362 |
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ftnerc:oai:nora.nerc.ac.uk:521322 2023-05-15T13:49:35+02:00 Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands Rees, P.M. Smellie, John L. 1989-09 http://nora.nerc.ac.uk/id/eprint/521322/ https://doi.org/10.1017/S0954102089000362 unknown Cambridge University Press Rees, P.M.; Smellie, John L. 1989 Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands. Antarctic Science, 1 (03). 239-248. https://doi.org/10.1017/S0954102089000362 <https://doi.org/10.1017/S0954102089000362> Botany Publication - Article PeerReviewed 1989 ftnerc https://doi.org/10.1017/S0954102089000362 2023-02-04T19:47:17Z A terrestrial sequence on Livingston Island, South Shetland Islands, known as the Williams Point Beds contains a well-preserved, diverse fossil flora previously assigned a Triassic age. Because of their supposed age, volcanic provenance and evidence for active volcanism, the Williams Point Beds have occupied a unique position in Gondwana (pre-Jurassic) stratigraphy in the Antarctic Peninsula region. However, a large new collection of plant specimens obtained at Williams Point has yielded several species of angiosperm leaves, which are abundant and occur at all levels within the Williams Point Beds sequence. Thus, a Triassic age is no longer tenable. On the basis of the plants present and published radiometric ages for associated strata, the Williams Point Beds fossil flora is reassigned to the Cretaceous, and there is some evidence for a more restricted Albian–Cenomanian age. This revision of the age of the Williams Point Beds removes all direct evidence for an active Triassic volcanic arc in the Antarctic Peninsula region. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Livingston Island South Shetland Islands Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Williams Point ENVELOPE(67.617,67.617,-67.817,-67.817) Williams, Point ENVELOPE(67.617,67.617,-67.817,-67.817) Antarctic Science 1 3 239 248 |
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Natural Environment Research Council: NERC Open Research Archive |
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unknown |
topic |
Botany |
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Botany Rees, P.M. Smellie, John L. Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands |
topic_facet |
Botany |
description |
A terrestrial sequence on Livingston Island, South Shetland Islands, known as the Williams Point Beds contains a well-preserved, diverse fossil flora previously assigned a Triassic age. Because of their supposed age, volcanic provenance and evidence for active volcanism, the Williams Point Beds have occupied a unique position in Gondwana (pre-Jurassic) stratigraphy in the Antarctic Peninsula region. However, a large new collection of plant specimens obtained at Williams Point has yielded several species of angiosperm leaves, which are abundant and occur at all levels within the Williams Point Beds sequence. Thus, a Triassic age is no longer tenable. On the basis of the plants present and published radiometric ages for associated strata, the Williams Point Beds fossil flora is reassigned to the Cretaceous, and there is some evidence for a more restricted Albian–Cenomanian age. This revision of the age of the Williams Point Beds removes all direct evidence for an active Triassic volcanic arc in the Antarctic Peninsula region. |
format |
Article in Journal/Newspaper |
author |
Rees, P.M. Smellie, John L. |
author_facet |
Rees, P.M. Smellie, John L. |
author_sort |
Rees, P.M. |
title |
Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands |
title_short |
Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands |
title_full |
Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands |
title_fullStr |
Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands |
title_full_unstemmed |
Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands |
title_sort |
cretaceous angiosperms from an allegedly triassic flora at williams point, livingston island, south shetland islands |
publisher |
Cambridge University Press |
publishDate |
1989 |
url |
http://nora.nerc.ac.uk/id/eprint/521322/ https://doi.org/10.1017/S0954102089000362 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(67.617,67.617,-67.817,-67.817) ENVELOPE(67.617,67.617,-67.817,-67.817) |
geographic |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Livingston Island Williams Point Williams, Point |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Livingston Island Williams Point Williams, Point |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Livingston Island South Shetland Islands |
op_relation |
Rees, P.M.; Smellie, John L. 1989 Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands. Antarctic Science, 1 (03). 239-248. https://doi.org/10.1017/S0954102089000362 <https://doi.org/10.1017/S0954102089000362> |
op_doi |
https://doi.org/10.1017/S0954102089000362 |
container_title |
Antarctic Science |
container_volume |
1 |
container_issue |
3 |
container_start_page |
239 |
op_container_end_page |
248 |
_version_ |
1766251826746753024 |