Ostracoda during the early Aptian (early Cretaceous) greenhouse period on the Isle of Wight, England
Wilkinson, Ian P.. 2011 Ostracoda during the early Aptian (early Cretaceous) greenhouse period on the Isle of Wight, England. Proceedings of the Geologists' Association, 122 (5). 809-815. 10.1016/j.pgeola.2011.09.008Before downloading, please read NORA policies.
The earliest Aptian marine transgression of the Lower Cretaceous across southern England resulted in the collapse of the generally freshwater Barremian environment and the initiation of marine mileux. Salinities passed from fresh-oligohaline to meso- and pliohaline, reaching fully marine conditions during the obsoletum Subzone (P. fissicostus Zone). Newly formed environmental niches were rapidly occupied by ostracod associations. In the Isle of Wight, freshwater Cypridea-rich assemblages in the lower Shepherd's Chine Member (Vectis Formation) were gradually replaced by faunas dominated by Sternbergella cornigera, Mantelliana mantelli and Theriosynoecum fittoni. Marine taxa recorded from the Atherfield Clay Formation migrated predominantly from the Paris Basin and include Asciocythere albae, Schuleridea derooi, Neocythere gottisi, N. bordeti, Cythereis geometrica, Cytheropteron stchepinskyi and Protocythere croutesensis.
|Programmes:||BGS Programmes 2010 > Geology and Landscape (England)|
|Date made live:||07 Dec 2011 14:37|
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