Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation
New exposures of fossiliferous sedimentary rocks at Cape Framnes, Jason Peninsula (65°57′S, 60°33′W) are assigned to the Middle–Late Jurassic Latady Formation of the south-eastern Antarctic Peninsula region. A sequence of fine to coarse-grained sandstones of unknown thickness has yielded a molluscan...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1997
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102097000564 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000564 |
id |
crcambridgeupr:10.1017/s0954102097000564 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102097000564 2024-06-23T07:46:03+00:00 Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation Riley, T.R. Crame, J.A. Thomson, M.R.A. Cantrill, D.J. 1997 http://dx.doi.org/10.1017/s0954102097000564 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000564 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 9, issue 4, page 434-442 ISSN 0954-1020 1365-2079 journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0954102097000564 2024-06-12T04:04:27Z New exposures of fossiliferous sedimentary rocks at Cape Framnes, Jason Peninsula (65°57′S, 60°33′W) are assigned to the Middle–Late Jurassic Latady Formation of the south-eastern Antarctic Peninsula region. A sequence of fine to coarse-grained sandstones of unknown thickness has yielded a molluscan and plant macrofossil assemblage rich in the following elements: perisphinctid ammonites, belemnopseid belemnites, oxytomid, trigoniid and astartid bivalves, and bennettitalean fronds and fructifications. The overwhelming age affinities are with the Kimmeridgian–early Tithonian part of the Latady Formation, as exposed on the Orville and Lassiter coasts. The Cape Framnes sedimentary rocks help to constrain the age of a major sequence of acid volcanic rocks on Jason Peninsula, and show that the Latady Basin was geographically much more extensive than recognized previously. It was the principal depositional centre of Middle–Late Jurassic sedimentation in the Antarctic Peninsula back-arc region and in areal extent may have rivalled the essentially Cretaceous Larsen Basin. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Graham Land Cambridge University Press Antarctic Antarctic Peninsula Cape Framnes ENVELOPE(-60.583,-60.583,-65.967,-65.967) Framnes ENVELOPE(-60.750,-60.750,-65.983,-65.983) Graham Land ENVELOPE(-63.500,-63.500,-66.000,-66.000) Jason Peninsula ENVELOPE(-61.667,-61.667,-66.250,-66.250) Larsen Basin ENVELOPE(-60.000,-60.000,-68.000,-68.000) Lassiter ENVELOPE(-62.000,-62.000,-73.750,-73.750) Latady ENVELOPE(-65.833,-65.833,-75.500,-75.500) Orville ENVELOPE(-63.000,-63.000,-75.167,-75.167) The Antarctic Antarctic Science 9 4 434 442 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
New exposures of fossiliferous sedimentary rocks at Cape Framnes, Jason Peninsula (65°57′S, 60°33′W) are assigned to the Middle–Late Jurassic Latady Formation of the south-eastern Antarctic Peninsula region. A sequence of fine to coarse-grained sandstones of unknown thickness has yielded a molluscan and plant macrofossil assemblage rich in the following elements: perisphinctid ammonites, belemnopseid belemnites, oxytomid, trigoniid and astartid bivalves, and bennettitalean fronds and fructifications. The overwhelming age affinities are with the Kimmeridgian–early Tithonian part of the Latady Formation, as exposed on the Orville and Lassiter coasts. The Cape Framnes sedimentary rocks help to constrain the age of a major sequence of acid volcanic rocks on Jason Peninsula, and show that the Latady Basin was geographically much more extensive than recognized previously. It was the principal depositional centre of Middle–Late Jurassic sedimentation in the Antarctic Peninsula back-arc region and in areal extent may have rivalled the essentially Cretaceous Larsen Basin. |
format |
Article in Journal/Newspaper |
author |
Riley, T.R. Crame, J.A. Thomson, M.R.A. Cantrill, D.J. |
spellingShingle |
Riley, T.R. Crame, J.A. Thomson, M.R.A. Cantrill, D.J. Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation |
author_facet |
Riley, T.R. Crame, J.A. Thomson, M.R.A. Cantrill, D.J. |
author_sort |
Riley, T.R. |
title |
Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation |
title_short |
Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation |
title_full |
Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation |
title_fullStr |
Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation |
title_full_unstemmed |
Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation |
title_sort |
late jurassic (kimmeridgian-tithonian) macrofossil assemblage from jason peninsula, graham land: evidence for a significant northward extension of the latady formation |
publisher |
Cambridge University Press (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0954102097000564 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000564 |
long_lat |
ENVELOPE(-60.583,-60.583,-65.967,-65.967) ENVELOPE(-60.750,-60.750,-65.983,-65.983) ENVELOPE(-63.500,-63.500,-66.000,-66.000) ENVELOPE(-61.667,-61.667,-66.250,-66.250) ENVELOPE(-60.000,-60.000,-68.000,-68.000) ENVELOPE(-62.000,-62.000,-73.750,-73.750) ENVELOPE(-65.833,-65.833,-75.500,-75.500) ENVELOPE(-63.000,-63.000,-75.167,-75.167) |
geographic |
Antarctic Antarctic Peninsula Cape Framnes Framnes Graham Land Jason Peninsula Larsen Basin Lassiter Latady Orville The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Cape Framnes Framnes Graham Land Jason Peninsula Larsen Basin Lassiter Latady Orville The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Graham Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Graham Land |
op_source |
Antarctic Science volume 9, issue 4, page 434-442 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102097000564 |
container_title |
Antarctic Science |
container_volume |
9 |
container_issue |
4 |
container_start_page |
434 |
op_container_end_page |
442 |
_version_ |
1802643663303475200 |