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V.—On the Recognition of Two Stages in the Upper Chalk

Published online by Cambridge University Press:  01 May 2009

A. J. Jukes-Browne
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Extract

When writing a general account of the Upper Chalk of England for vol. iii of the Cretaceous Rocks of Britain (Mem. Geol. Survey, 1904), I stated the belief of Mr. W. Hill and myself that the British Tipper Chalk comprised more than one division of the value of a stage. We grouped the zones then recognized into two divisions, pointing out that the lower zones were essentially the Chalk with Micrasters and the upper zones the Chalk with Belemnites; but we did not systematically adopt these divisions as stages with definite names.

Type
Original Articles
Information
Geological Magazine , Volume 9 , Issue 7 , July 1912 , pp. 304 - 313
Copyright
Copyright © Cambridge University Press 1912

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References

page 306 note 1 The Zones of the Chalk in Hants, by Griffith, C. & Brydone, R. M. (Dulau & Co., 1911), pp. 3, 10.Google Scholar

page 306 note 2 See Schlüter in Zeitsch. der Deutsch. Geol. Oesellschaft, Bd. xxviii, p. 457, 1876, and Imp. Geol. Inst., Vienna, Sitz. for 1877.Google Scholar

page 306 note 3 Lambert, , “Terrain Crétacé du départ, de I'Yonne”: Bull. Soc. Sci. hist, et nat. de l'Yonne for 1876.Google Scholar

page 306 note 4 Peron, , “Terrain de craie dans le Sud-est du bassiu angloparisien”: op. cit. supra (1887).Google Scholar

page 306 note 5 “Le Terr. Cret. du Sud-ouest, ” Mém. Soc. géol. France (1877);Google Scholar and “Report of Excursion to the Charente”, Bull. Soc. géol. France (1877).Google Scholar

page 308 note 1 “Recherches sur la Craie Supérieur”: Mém. Carte Dét. de la France,, fasc. ii, p. 700.Google Scholar