A petrified Glossopteris flora from Collinson Ridge, central Transantarctic Mountains: Late Permian or Early Triassic?

The Permian–Triassic boundary in Gondwana has traditionally been based on lithology and a change from the glossopterid-dominated flora in the Permian to the Dicroidium-dominated flora in the Triassic. There have, however, been a few reports of Glossopteris occurring in the Lower Triassic of Tasmania...

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Bibliographic Details
Published in:Review of palaeobotany and palynology 2002-07, Vol.120 (3), p.233-246
Main Authors: McManus, Hilary A., Taylor, Edith L., Taylor, Thomas N., Collinson, James W.
Format: Article
Language:English
Subjects:
Antarctica
biostratigraphy
Dicroidium
flora
Glossopteris
Permian–Triassic boundary
Shackleton Glacier area
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Summary:The Permian–Triassic boundary in Gondwana has traditionally been based on lithology and a change from the glossopterid-dominated flora in the Permian to the Dicroidium-dominated flora in the Triassic. There have, however, been a few reports of Glossopteris occurring in the Lower Triassic of Tasmania, Antarctica, South Africa and India, usually as a minor element in floras dominated by Dicroidium. The material described here was collected from a lens of silicified peat from Collinson Ridge in the central Transantarctic Mountains, Shackleton Glacier area of Antarctica. Based on lithology, this site appears to be in the lower part of the Fremouw Formation, which has previously been dated as Early Triassic. However, the discovery of a dominant Glossopteris flora, including petrified leaf fragments, Vertebraria and Araucarioxylon-type wood, along with the absence of Dicroidium, suggests a latest Permian age.
ISSN:0034-6667
1879-0615
DOI:10.1016/S0034-6667(02)00078-7