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- Title
Latest Jurassic-earliest Cretaceous age for a fossil flora from the Latady Basin, Antarctic Peninsula.
- Authors
Hunter, Morag A.; Cantrill, David J.; Flowerdew, Michael J.
- Abstract
Dating Jurassic terrestrial floras in the Antarctic Peninsula has proved problematic and controversial. Here U-Pb series dating on detrital zircons from a conglomerate interbedded with fossil plant material provide a maximal depositional age of 144 ± 3 Ma for a presumed Jurassic flora. This is the first confirmed latest Jurassic-earliest Cretaceous flora from the Latady Basin, and represents some of the youngest sedimentation in this basin. The presence of terrestrial sedimentation at Cantrill Nunataks suggests emergence of the arc closer to the Latady Basin margin in the south compared to Larsen Basin in the north, probably as a result of the failure of the southern Weddell Sea to undergo rifting.
- Subjects
ANTARCTIC Peninsula (Antarctica); WEDDELL Sea (Antarctica); FOSSIL plants; JURASSIC paleobotany; CRETACEOUS stratigraphic geology; SEDIMENTATION &; deposition; GEOLOGICAL basins; URANIUM-lead dating; GEOCHRONOMETRY
- Publication
Antarctic Science, 2006, Vol 18, Issue 2, p261
- ISSN
0954-1020
- Publication type
Article
- DOI
10.1017/S0954102006000290