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Dinoflagellate cyst distributions and the Albian-Cenomanian boundary (mid-Cretaceous) at Cordebugle, NW France and Lewes, southern England.
| Tocher, B.A. and Jarvis, I. | |
| 1996 | |
| Journal of Micropalaeontology, 15: 55-67Journal of Micropalaeontology, 15: 55-67 | |
| Dinoflagellate cyst distributions and the Albian-Cenomanian boundary (mid-Cretaceous) at Cordebugle, NW France and Lewes, southern England. |
Tocher, B.A. and Jarvis, I., 1996. Dinoflagellate cyst distributions and the Albian-Cenomanian boundary (mid-Cretaceous) at Cordebugle, NW France and Lewes, southern England. Journal of Micropalaeontology, 15: 55-67. ABSTRACT - The Albian-Cenomanian boundary successions at Livet Quarry, Cordebugle and Rodmell Cement Works, Lewes are described. Moderately abundant and diverse dinoflagellate cyst assemblages comprising 89 taxa are recorded and related to ammonite, foraminiferal and other faunal data from the two sites. The genus Ouoidinium forms a major component of cyst assemblages from the boundary intervals at both localities. Ovoidmium scabrosum (Cookson & Hughes) Davey is replaced by abundant Ouoidinium verrucosum uerrucosum (Cookson & Hughes) Davey close to, and possibly at, the stage boundary, offering a potential dirroflagellate cyst marker for the base of the Cenomanian Stage. The published ranges of a number of species are extended. Six taxa are recorded for the first time from NW Europe: Apteodinium reticulatum Singh, Disphaeria macropyla Cookson & Eisenack, Nematosphaeropsis densiradiata (Cookson & Eisenack) Stover & Evitt and Peruosphaeridium cenomaniense (Norvick) Below occur in the high Upper Albian; Ouoidinium uerrucosum (Cookson & Hughes) ostium (Davey) Lentin & Williams and Tanyosphaeridium salpinx Norvick are recorded from the lowest Lower Cenomanian. Increased cyst abundance and diversity at Lewes when compared with Cordebugle is related to the more basinal setting of the former locality. J. Micropalaeontol. 15(1): 55-67. April 1996.