A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution
Recent detailed mapping, section logging and an improved understanding of the geological evolution of the Antarctic Peninsula provide a robust framework for an improved lithostratigraphic subdivision of the Latady Basin, eastern Ellsworth Land. Within the Latady Basin we recognize two main groups: E...
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Online Access: | http://dx.doi.org/10.1017/s0016756806002603 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756806002603 |
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crcambridgeupr:10.1017/s0016756806002603 2024-09-15T17:41:28+00:00 A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution HUNTER, M. A. CANTRILL, D. J. 2006 http://dx.doi.org/10.1017/s0016756806002603 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756806002603 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 143, issue 6, page 797-819 ISSN 0016-7568 1469-5081 journal-article 2006 crcambridgeupr https://doi.org/10.1017/s0016756806002603 2024-07-31T04:03:36Z Recent detailed mapping, section logging and an improved understanding of the geological evolution of the Antarctic Peninsula provide a robust framework for an improved lithostratigraphic subdivision of the Latady Basin, eastern Ellsworth Land. Within the Latady Basin we recognize two main groups: Ellsworth Land Volcanic Group and Latady Group. The focus of this paper is the Latady Group, which is formally subdivided into five formations: Anderson Formation, Witte Formation, Hauberg Mountains Formation, Cape Zumberge Formation and Nordsim Formation. Middle Jurassic, shallow marine deposits of the Anderson Formation are overlain by quiet anoxic deposits assigned to the Witte Formation. The start of the Late Jurassic is marked by the deposition of higher energy deposits of the Hauberg Mountains Formation, subdivided into three members (Long Ridge, Mount Hirman and Novocin members) that reflect varying lithological and environmental characteristics. Thermal subsidence during the latest Jurassic led to deposition of the basinal Cape Zumberge Formation, while uplift of an active continental arc along the Antarctic Peninsula led to deposition of the terrestrial Nordsim Formation in the latest Jurassic to earliest Cretaceous. The evolution of the Latady Basin reflects early extension during Gondwana break-up, from the Early Jurassic to earliest Cretaceous, and is consistent with a shift in the underlying forces driving extension in the Weddell Sea area from intracontinental rifting related to a mantle plume, to active margin forces in response to subduction. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Weddell Sea Cambridge University Press Geological Magazine 143 6 797 819 |
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Cambridge University Press |
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English |
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Recent detailed mapping, section logging and an improved understanding of the geological evolution of the Antarctic Peninsula provide a robust framework for an improved lithostratigraphic subdivision of the Latady Basin, eastern Ellsworth Land. Within the Latady Basin we recognize two main groups: Ellsworth Land Volcanic Group and Latady Group. The focus of this paper is the Latady Group, which is formally subdivided into five formations: Anderson Formation, Witte Formation, Hauberg Mountains Formation, Cape Zumberge Formation and Nordsim Formation. Middle Jurassic, shallow marine deposits of the Anderson Formation are overlain by quiet anoxic deposits assigned to the Witte Formation. The start of the Late Jurassic is marked by the deposition of higher energy deposits of the Hauberg Mountains Formation, subdivided into three members (Long Ridge, Mount Hirman and Novocin members) that reflect varying lithological and environmental characteristics. Thermal subsidence during the latest Jurassic led to deposition of the basinal Cape Zumberge Formation, while uplift of an active continental arc along the Antarctic Peninsula led to deposition of the terrestrial Nordsim Formation in the latest Jurassic to earliest Cretaceous. The evolution of the Latady Basin reflects early extension during Gondwana break-up, from the Early Jurassic to earliest Cretaceous, and is consistent with a shift in the underlying forces driving extension in the Weddell Sea area from intracontinental rifting related to a mantle plume, to active margin forces in response to subduction. |
format |
Article in Journal/Newspaper |
author |
HUNTER, M. A. CANTRILL, D. J. |
spellingShingle |
HUNTER, M. A. CANTRILL, D. J. A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution |
author_facet |
HUNTER, M. A. CANTRILL, D. J. |
author_sort |
HUNTER, M. A. |
title |
A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution |
title_short |
A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution |
title_full |
A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution |
title_fullStr |
A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution |
title_full_unstemmed |
A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 2, Latady Group and basin evolution |
title_sort |
new stratigraphy for the latady basin, antarctic peninsula: part 2, latady group and basin evolution |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1017/s0016756806002603 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756806002603 |
genre |
Antarc* Antarctic Antarctic Peninsula Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Weddell Sea |
op_source |
Geological Magazine volume 143, issue 6, page 797-819 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756806002603 |
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Geological Magazine |
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143 |
container_issue |
6 |
container_start_page |
797 |
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819 |
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1810487662665007104 |