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

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 re...

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Bibliographic Details
Published in:Antarctic Science
Main Author: Sumner, Paul W.
Format: Article in Journal/Newspaper
Language:unknown
Published: Cambridge University Press 1992
Subjects:
Antarctic
Antarctic Peninsula
Ross Island
Rabot
Ekelöf
Ekelöf Point
Antarc*
Antarctic Science
James Ross Island
Online Access:http://nora.nerc.ac.uk/id/eprint/519064/
https://doi.org/10.1017/S0954102092000464
Description
Summary: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.

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