Chalk Group Lithostratigraphy: East Anglia - Lower Marl

The Lower Marl was identified on borehole resistivity logs across East Anglia by Murray (1986), and correlated with Barton Marl 1 of the northern England Chalk Group succession (Mortimore & Wood, 1986). It occurs at a depth of 482.71 m in the Trunch Borehole [TG 2933 3455] in north Norfolk, and comprises a 1cm grey-green laminated marl with chalk lenses (Arthurton et al., 1994).

Macrofossil Biozonation: T. lata Zone

References

ARTHURTON, R S, BOOTH, S J, MORIGI, A N, ABBOTT, M A W & WOOD, C J. 1994. Geology of the country around Great Yarmouth. Memoir of the British Geological Survey.

MORTIMORE, R N & WOOD, C J.1986. The distribution of flint in the English Chalk, with particular reference to the 'Brandon Flint Series' and the high Turonian flint maximum. In SIEVEKING, G de C & HART, M B. The scientific study of flint and chert. Cambridge University Press, Cambridge.

MURRAY, K H.1986. Correlation of electrical resistivity marker bands in the Cenomanian and Turonian Chalk from the London Basin to east Yorkshire. Report of the British Geological Survey, Vol. 17, No. 8.

See: Barton Marl 1