Chalk Group Lithostratigraphy: East Anglia - Methwold Marl

The Methwold Marl was identified on borehole resistivity logs across East Anglia by Murray (1986), and correlated with the Grasby Marl of the northern England Chalk Group succession (Gaunt et al., 1994). It was recorded at a depth of 487.59 m in the Trunch Borehole [TG 2933 3455] in north Norfolk, and comprises a 2cm grey-green, laminated marl (Arthurton et al., 1994).

Macrofossil Biozonation: basal/lower 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.

GAUNT, G D, FLETCHER, T P & WOOD, C J. 1992. Geology of the country around Kingston-upon-Hull and Brigg. Memoir of the British Geological Survey.

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: Grasby Marl