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Dinoflagellate cysts from the Rabot Member (Santa Marta Formation) of eastern James Ross Island

Published online by Cambridge University Press:  13 May 2004

Paul W. Sumner
Paul W. Sumner
Affiliation:
Centre for Palynological Studies, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
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Abstract

Palynomorph assemblages dominated by dinoflagellate cysts are described from seventeen samples from the Rabot Member of the Santa Marta Formation at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula. Although the assemblages are of relatively low diversity, the dinoflagellate cyst taxa recorded indicate a mid to late Campanian (Late Cretaceous) age. Changes in species diversity, dominance and gonyaulacacean ratio suggest a gradually reducing distance from shore during deposition, with a return to more offshore conditions towards the section top. A new species of dinoflagellate cyst, Isabelidinium papillum, is described.

Keywords

Campaniandinoflagellate cystsEkelöf PointSanta Marta Formation
Type
Research Article
Information
Antarctic Science , Volume 4 , Issue 3 , September 1992 , pp. 305 - 310
Copyright
© Antarctic Science Ltd 1992

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