The biostratigraphy of the Albian and Cenomanian succession in the Ventnor No. 2 borehole, Isle of Wight

Abstract

This report describes the foraminifera found in the uppermost part of the Gault, Upper Greensand, Glauconitic Marl and West Melbury Marly Chalk of Ventnor No.2 Borehole (the "Carstone of the Isle of Wight" was barren of calcareous microfaunas). Albian foraminiferal zones followed those defined by CARTER & HART (1977), HART et al. (1989, 1990) and HART (2000). Cenomanian zones are those described by WILKINSON (2000). Albian foraminiferal zones 3 to5 were recognised in the Gault and foraminiferal zone 6 and questionable 6a were observed in the Upper Greensand Cenomanian foraminiferal zones BGS1 was present in the Glauconitic Marl and BGS2 and BGS3 were present in the West Melbury Chalk