A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin
Ammonite-bearing Jurassic and Cretaceous sedimentary successions are well developed in the Antarctic Peninsula and the Magallanes Basin of Patagonia. Faunas of middle Jurassic-late Cretaceous age are present in Antarctica but those of Patagonia range no earlier than late Jurassic. Although the late...
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Geological Society of London
1982
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Online Access: | http://nora.nerc.ac.uk/id/eprint/524517/ https://doi.org/10.1144/gsjgs.139.6.0763 |
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ftnerc:oai:nora.nerc.ac.uk:524517 2023-05-15T13:41:44+02:00 A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin Thomson, M.R.A. 1982 http://nora.nerc.ac.uk/id/eprint/524517/ https://doi.org/10.1144/gsjgs.139.6.0763 unknown Geological Society of London Thomson, M.R.A. 1982 A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin. Journal of the Geological Society, 139 (6). 763-770. https://doi.org/10.1144/gsjgs.139.6.0763 <https://doi.org/10.1144/gsjgs.139.6.0763> Publication - Article PeerReviewed 1982 ftnerc https://doi.org/10.1144/gsjgs.139.6.0763 2023-02-04T19:48:53Z Ammonite-bearing Jurassic and Cretaceous sedimentary successions are well developed in the Antarctic Peninsula and the Magallanes Basin of Patagonia. Faunas of middle Jurassic-late Cretaceous age are present in Antarctica but those of Patagonia range no earlier than late Jurassic. Although the late Jurassic perisphinctid-dominated faunas of the Antarctic Peninsula show wide-ranging Gondwana affinities, it is not yet possible to effect a close comparison with faunas of similar age in Patagonia because of the latter’s poor preservation and our scant knowledge of them. In both regions the Neocomian is not well represented in the ammonite record, although uninterrupted sedimentary successions appear to be present. Lack of correspondence between the Aptian and Albian faunas of Alexander I. and Patagonia may be due to major differences in palaeogeographical setting. Cenomanian-Coniacian ammonite faunas are known only from Patagonia, although bivalve faunas indicate that rocks of this age are present in Antarctica. Kossmaticeratid faunas mark the late Cretaceous in both regions. In Antarctica these have been classified as Campanian, whereas in Patagonia it is generally accepted, perhaps incorrectly, that these also range into the Maestrichtian. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Patagonia Magallanes ENVELOPE(-62.933,-62.933,-64.883,-64.883) Journal of the Geological Society 139 6 763 770 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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description |
Ammonite-bearing Jurassic and Cretaceous sedimentary successions are well developed in the Antarctic Peninsula and the Magallanes Basin of Patagonia. Faunas of middle Jurassic-late Cretaceous age are present in Antarctica but those of Patagonia range no earlier than late Jurassic. Although the late Jurassic perisphinctid-dominated faunas of the Antarctic Peninsula show wide-ranging Gondwana affinities, it is not yet possible to effect a close comparison with faunas of similar age in Patagonia because of the latter’s poor preservation and our scant knowledge of them. In both regions the Neocomian is not well represented in the ammonite record, although uninterrupted sedimentary successions appear to be present. Lack of correspondence between the Aptian and Albian faunas of Alexander I. and Patagonia may be due to major differences in palaeogeographical setting. Cenomanian-Coniacian ammonite faunas are known only from Patagonia, although bivalve faunas indicate that rocks of this age are present in Antarctica. Kossmaticeratid faunas mark the late Cretaceous in both regions. In Antarctica these have been classified as Campanian, whereas in Patagonia it is generally accepted, perhaps incorrectly, that these also range into the Maestrichtian. |
format |
Article in Journal/Newspaper |
author |
Thomson, M.R.A. |
spellingShingle |
Thomson, M.R.A. A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin |
author_facet |
Thomson, M.R.A. |
author_sort |
Thomson, M.R.A. |
title |
A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin |
title_short |
A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin |
title_full |
A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin |
title_fullStr |
A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin |
title_full_unstemmed |
A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin |
title_sort |
comparison of the ammonite faunas of the antarctic peninsula and magallanes basin |
publisher |
Geological Society of London |
publishDate |
1982 |
url |
http://nora.nerc.ac.uk/id/eprint/524517/ https://doi.org/10.1144/gsjgs.139.6.0763 |
long_lat |
ENVELOPE(-62.933,-62.933,-64.883,-64.883) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia Magallanes |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia Magallanes |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
Thomson, M.R.A. 1982 A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin. Journal of the Geological Society, 139 (6). 763-770. https://doi.org/10.1144/gsjgs.139.6.0763 <https://doi.org/10.1144/gsjgs.139.6.0763> |
op_doi |
https://doi.org/10.1144/gsjgs.139.6.0763 |
container_title |
Journal of the Geological Society |
container_volume |
139 |
container_issue |
6 |
container_start_page |
763 |
op_container_end_page |
770 |
_version_ |
1766155556399087616 |