Category:South-west England Chalk Group Lithostratigraphy: summary of schemes: Difference between revisions

Early work by De La Beche (1826) classified the Chalk Group of south-west England according to its sand (lower beds) or flint content. Later, Jukes-Browne & Hill (1903, 1904) divided the Chalk according to the three-fold subdivision of Lower, Middle and Upper Chalk that was established by the Geological Survey from earlier work in East Anglia and the Chilterns, and until recently this has remained the traditional lithostratigraphical scheme for the region. However, more recent work by Jarvis & Woodroof (1984) and Jarvis & Tocher (1987) has shown that a more refined classification of the chalk is possible, and they recognised and named key marker beds that could be used to correlate successions.

References

DE LA BECHE, H T. 1826. On the Chalk and sands beneath it (usually termed Grren-sand) in the vicinity of Lyme Regis, Dorset, and Beer, Devon. Transactions of the Geological Society, Vol. 21, 109-118.

JARVIS, I & TOCHER, B A. 1987. Field Meeting: the Cretaceous of SE Devon, 14 - 16th March, 1986. Proc. Geol. Ass., Vol. 98 (1), 51-66.

JARVIS, I & WOODROOF, P B. 1984. Stratigraphy of the Cenomanian and basal Turonian (Upper Cretaceous) between Branscombe and Seaton, S E Devon, England. Proceedings of the Geologists' Association, Vol. 95 (3), 193-215.

JUKES-BROWNE, A J & HILL, W.1903. The Cretaceous rocks of Britain. Vol. 2 - The Lower and Middle Chalk of England. Memoir of the Geological Survey of the United Kingdom.

JUKES-BROWNE, A J & HILL, W.1904. The Cretaceous rocks of Britain. Vol. 3 - The Upper Chalk of England. Memoir of the Geological Survey of the United Kingdom.