68 GEOLOGY. 



Marl. Between the marly Chalk and the white clay with Belemnites 

 there are considerable denudations. G. A. L. 



GossELET, Prof. J. Carte geologiqne de la Bande Meridionale des 



Calcaires Devoniens de I'Entre Sambre et Meuse. [Geological map 



of the southern band of Devonian limestones between the Sambre 



and the Mouse.] . Bull. Acad. Roy. Belg. 2 serie, t. xxxvii. no. 1, 



36 pp., map, 1 plate of sections and 6 figs, in text. 



The divisions described and mapped in this band of Devonian rocks 



are: — Limestone of Givet, with Stringocephalus Burtini; shales and 



limestone of Couvin, with Calceola sandalina ; shales and limestone of 



Frasne, with Rhynchonella cuho'ides ; and shales of Matagne, with Gar- 



dium palmatum. G. A. L. 



. Etudes sur le gisement de la Houille dans le Nord de la 



Prance. [Coal Measures in the north of France.] Bull. Soc. 

 Indust. N. France, no. 6, 24 pp., 2 plates, 6 figs, in text. 



Explains the formation of the Carboniferous basins of Namur or 

 Valenciennes and of Dinant or Avesnes, which are separated by the 

 Siluro-Devonian ridge of Condros. An account of the great fault which 

 coincides with this ridge is given, showing how, by means of its great 

 obliquity, the Coal Measures are brought under rocks of Carboniferous 

 Limestone and Devonian age. M. Gosselet believes the sub-Wealden 

 boring to be at a favourable point for striking either the continuation 

 of the great Franco-Belgian coal-basin, or, at all events, very neigh- 

 bouring rocks. G. A. L. 



Gosselet, J., and — Bertaut. Etude sur le Terrain Carbonifere du 

 Boulonnais. [Carboniferous beds of the Boulonnais.] Mem. Soc. 

 Sci. Agr. et Arts, Lille, 3 ser. vol. xi. Ann. 1873 [pub. 1874?], 

 27 pp., map and 3 plates. 

 The divisions recognized in the Carboniferous series of the Boulon- 

 nais are: — Carboniferous Limestone: 1, dolomite of Hure; 2, lime- 

 stone of Haut-Banc, with Productus cora ; 3, Napoleon limestone, with 

 Productus undatus ; and, 4, Productus-giganteus limestone. Coal Mea- 

 sures : 5, sandstone of the Hardinghem plains; and, 6, coal-bearing 

 shales of Locquinghen. Where the limestone 1 is found overlying the 

 coal-seams of 6, the authors explain the fact by the hypothesis of a 

 fault having a nearly horizontal hade (see p. 67). G. A. L. 



Grunee, — . Sur le Carbonifere et Tanthracifere du Eoannais. 



[Carboniferous and anthraciferous rocks of the Roannais.] Bull. 



Soc. Geol. France, 3 ser. t. i. pp. 445, 446. 



Notes on the Carboniferous Limestone of E-egny, which dips to the 



north and to the south under a thick formation of anthraciferous grits, 



which the author likens to a series of pophyritic tuffs. G. A. L. 



. Terrains de transition du Roannais tfec. [Transition rocks 



of the Roannais &c.] Bull. Soc. Geol. France, 3 ser. t. i. pp. 448- 

 450. 



