Calcareous nannofossils from the Santa Marta Formation (Upper Cretaceous), northern James Ross Island, Antarctic Peninsula

This study reports on the most stratigraphically extensive nannofloras yet recovered from the Lachman Crags Member of the Santa Marta Formation, James Ross Island, Antarctic Peninsula. The productive samples are dated as early Campanian. These ages are in accord with those provided by ammonites, for...

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Bibliographic Details
Main Authors: Guerra, R.D.M., Concheyro, A., Lees, J., Fauth, G., de Araujo Carvalho, M., Cabral Ramos, R.R.
Format: Journal/Newspaper
Language:unknown
Subjects:
Antarctic Peninsula
Calcareous nannofossils
Cretaceous
Early Campanian
Gephyrobiscutum diabolum
James Ross Island
Foraminifera
Ostracoda
Radiolaria (protozoans)
Antarc*
Antarctic
Ross Island
Online Access:https://hdl.handle.net/20.500.12110/paper_01956671_v56_n_p550_Guerra
Description
Summary:This study reports on the most stratigraphically extensive nannofloras yet recovered from the Lachman Crags Member of the Santa Marta Formation, James Ross Island, Antarctic Peninsula. The productive samples are dated as early Campanian. These ages are in accord with those provided by ammonites, foraminifera, ostracods and radiolarians from the same locality. The consistent and relatively abundant presence of Gephyrobiscutum diabolum throughout the productive part of the section, a species that has previously only been documented from the Falkland Plateau, extends its geographic distribution to higher latitudes, at least to the Antarctic Peninsula area. © 2015 Elsevier Ltd.

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