First radiation of Cretaceous planktonic foraminifera with radially elongate chambers at Angles (southeastern France) and biostratigraphic implications
Articolo
Data di Pubblicazione:
2007
Citazione:
First radiation of Cretaceous planktonic foraminifera with radially elongate chambers at Angles (southeastern France) and biostratigraphic implications / R. COCCIONI, I. PREMOLI SILVA, A. MARSILI, D. VERGA. - In: REVUE DE MICROPALÉONTOLOGIE. - ISSN 0035-1598. - 50:3(2007), pp. 215-224. [10.1016/j.revmic.2007.06.005]
Abstract:
The study of planktonic foraminifera from the Lower Cretaceous succession at Angles (Southeastern France) directly correlated with ammonites, confirms that the origin of morphotypes with radially elongated chambers occur earlier than previously recorded. In particular, the species Hedbergella semielongata and Hedbergella roblesae bearing subclavate to clavate chambers first appear in the upper Hauterivian, just predating the onset of the oceanic anoxic Faraoni event. Based on these observations, a new zonation is proposed.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Biostratigraphic scheme; Lower Cretaceous; Planktonic foraminifera; Southeastern France
Elenco autori:
R. Coccioni, I. PREMOLI SILVA, A. Marsili, D. Verga
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