Category:Southern Region Chalk Group Lithostratigraphy: The North Downs (Robinson, 1986): Difference between revisions

Robinson (1986) proposed a lithostratigraphical scheme for the Chalk Group of the North Downs, some of the nomenclature being borrowed from earlier classifications (Dowker, 1870; Whitaker et al., 1872, Barrois, 1876) that predated the establishment of the traditional tripartite (Lower Chalk, Middle Chalk & Upper Chalk) subdivision. Mortimore (1987) suggested that there was good correlation with the lithostratigraphical scheme he had simultaneously proposed for the South Downs (Mortimore, 1986a), and reccommended rationalisation of the lithostratigraphical nomenclature by adoption of most of the more expanded Sussex stratotypes for both areas. Robinson (1987) disputed Mortimore's (1987) correlation of the two lithostratigraphical schemes, and maintained that the lithological differences of the North Downs Chalk compared to the South Downs warranted a separate nomenclature for the former.

The details of the Robinson (1986) scheme for the Chalk Group of the North Downs are as follows:

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References

BARROIS, C. 1876. Recherches sur le Terrain Crétace supérieur de l'Angleterre et de l'Irlande. Memoir Sociéte Géologique du Nord, Vol. 1, 234 pp.

DOWKER, G. 1870. On the Chalk of Thanet, Kent, and its connection with the Chalk of east Kent. Geological Magazine, Vol. 7, 466-472.

MORTIMORE, R N.1986a. Stratigraphy of the Upper Cretaceous White Chalk of Sussex. Proceedings of the Geologists' Association, Vol. 97(2), 97-139.

MORTIMORE, R N.1987. Upper Cretaceous Chalk in the North and South Downs, England: a correlation. Proc. Geol. Ass., Vol. 98 (1), 77 - 86.

ROBINSON, N D.1986. Lithostratigraphy of the Chalk Group of the North Downs, southeast England. Proceedings of the Geologists' Association, Vol. 97, 141-170.

ROBINSON, N D. 1987. Upper Cretaceous Chalk in the North and South Downs, England: a reply. Proceedings of the Geologists' Association, Vol. 98, 87-93.

WHITAKER, W, BRISTOW, H W & HUGHES, T McK, 1872. The geology of the London Basin Part I. The Chalk and the Eocene beds of the southern and western tracts. Memoir of the Geological Survey of England & Wales.

See: Southern Region Chalk Group Lithostratigraphy (Traditional Classification), Southern Region Chalk Group Lithostratigraphy (Mortimore, 1986a)