EUROPE. / 6 



the exact position of the zone in question, ahout 13 metres below the 

 Turonian beds with liadiolites cornupastons. G. A. L. 



Hebert, Prof. E. Ondulations de la Craie dans le Nord de la France. 



[Undulations of the Chalk in N. France.] Ann. Sci. Geol. vii. cah. i. 



48 pp. ; 2 plates (map and section), 3 woodcuts. Noticed in Geol. 



Mag. dec. ii. vol. iv. pp. 75-77. 

 In relation to the two systems of folds enumerated here and in " Un- 

 dulations of the Chalk in the Paris Basin " (see p. 72), lays down the 

 age of some of the movements of N. France in Secondary times. The 

 1st predicated is the depression of the Weald, direction S.W.-N.E. ; the 

 2nd that of the R. Somme, S.E.-N.W., between the Weald and Neo- 

 comian ; the 3rd the commencement of the Weald and Boulonnais anti- 

 clinal, S.E.-N.W., between the Gault and glauconitic chalk ; the 4th 

 separates the Cenomanian from the Turonian, it is the S.W.-N.E. anti- 

 clinal from Ferte-Bernard to Brunelles ; the 5th is the triple fold of 

 the Perche, S.E.-N.W., of Turonian date ; the 6th set are those of the 

 Seine, Bray, Bresle, and Artois, S.E.-N.W., dating after the M. coran- 

 guinum Chalk, and before the Belemnitella beds ; the 7th, S.W.-X.E., 

 Breteuil to Pressagny, is also before the last-mentioned beds. These 

 are irrespective of others whose age cannot be given ; the S.E.-N.W. 

 system has had most influence on the relief of the ground. E. B. T. 



. Undulations of the Chalk in the North of France, and their 



probable existence under the Straits of Dover. Hep. Brit. Assoc. 



for 1875, Sections, pp. 67-69. 

 The author, having shown that the Cretaceous beds in the N. of France 

 are folded so as to form 5 anticlinal axes having a S.E. and N.W. di- 

 rection, now shows that there are folds transverse to this, or from S.AV. 

 to N.E. This is proved by observing the heights attained by the 

 Chloritic Marl. The author infers that a transverse anticlinal lies under 

 the Straits of Dover, which will bring the U. Greensand within the line 

 of the proposed tunnel. W. T. 



Plissements de la Craie dans le Nord de la France. [Folds 



of the Chalk in N. France.] Compt. Rend. t. Ixxxii. pp. 101, 236, 

 919. 

 On the same subject as the foregoing abstracts. 



. Notes sur le Terrain Cretace du Departement de PYonno. 



[Cretaceous Beds of the Yonne.] BuU. Soc. Sci. Yonne^ ser. 2, t. ix. 

 pp. 15-46. 

 D(itail8 of sections in the N.E. corner of the department. The Ceno- 

 manian {Ammonites varians) is subdivided into chalky marls (Ostrea 

 vesiculosa) and Holaster nodulosus Chalk. The latter is followed by the 

 Turonian (Tnoceramus labia tus Chalk below, Holaster phnus Chalk 

 above), and that bv the Senonian (Micraster cor-testudinanum) Chalk. 

 ^ W.H.D. 



Hear, Prof. Oswald. The Primceval World of Switzerland. Trans- 



