Albian–Cenomanian Foraminifera and Ostracoda from the Glyndebourne Borehole, Sussex, U.K.
The Glyndebourne Borehole was drilled by the British Geological Survey in 1973 but the analysis of the foraminifera and ostracods remains unpublished: documented only in an un-published PhD thesis. The Gault Clay Formation, though thicker than that at Copt Point (Folkestone, U.K.), still has a number of hiatuses, especially near the base of the Middle Albian and at the Middle–Upper Albian boundary. The absence of the distinctive, glauconitic, 'Bed Xll' near the base of the Dispar Zone and the resulting differences in the ranges of key taxa has proved problematic. Throughout the remainder of the succession the distribution of the foraminifera closely follows that recorded at other locations in S.E. England (most notably Folkestone) but the uppermost Albian remains an issue for future research. The hiatus at the Albian–Cenomanian boundary was predicted by comparison to the succession at Beachy Head (Eastbourne), located a few kilometres to the south, and is much better understood in terms of biostratigraphy.
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Document Type: Research Article
Publication date: 2012-12-01
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