as advocated by M. ElU de Beaumont, ld5 



would present anomalies in the direction of the dislocations. 

 *' La plus marquee probablement produite immediatement apres 

 le depot des roches suposees redressees court suivant des lignes 

 dont Tangle avec le meridien varie de 90° kiiT SCX (vers Touest), 

 mais qui sont toujours tres pres d'etre exactement paralleles k 

 un grand cercle qui passerait par le Ballon d'*Alsace (dans le 

 midi des Vosges), en faisant avec le meridien du lieu un angle de 

 74% ou en se dirigeant de PO 16° N., a PE., 16° S;* Now, Mr 

 Weaver assigns to the anthracitiferous rocks of Southern Ice- 

 land, a general direction from west to east, with an inclination 

 to the south and north. In Devonshire and Somersetshire, the 

 direction is W. 10°, N. to E. 10° S. We thus perceive the 

 pliableness which M. de Beaumont has given to his system, a 

 quality which makes it agree still less with systematic ideas. 

 On the other hand, he has thus been enabled to answer skilfully 

 the objection made by Messrs Sedgwick, De la Beche, and Con- 

 nybeare, in regard to the parallelism of elevation of the older 

 rocks in western England, and in the south of Ireland, where 

 these gentlemen think they have observed contemporaneous up- 

 heavings from the E. of N.E. to the W. of S.W., and from E. to 

 W. I have pointed out dislocations in Hungary which run from 

 E. to W"., and which are of a more recent age than the pre- 

 ceding. (See Bullet, de la Soc. Geol. de France, vol. iv. p. 75.) 



The third system of elevation, that of the North ofEngland^ 

 has been founded on the able observations of Mr Sedgwick, who 

 has shewn that England is traversed by a hilly carboniferous 

 axis, which runs from S. toN., but bends a little to the N.N. W. 

 " Les forces soulevantes auraient agi (non toutefois sans des de- 

 viations considerables), suivant des lignes dirigees a peu pres du 

 S. 5° E., au N. 5° 0;'' (p. 630). The consequence of this is the oc- 

 currence of great faults in Derbyshire, at the foot of Crossfell 

 and the Craven hills, as well as in the anticlinal line of the wes- 

 tern moors of Yorkshire. All these fractures have preceded the 

 formation of the old red sandstone, and indicate a violent and 

 momentary action with which Mr Sedgwick connects also the 

 eruption of the trap rocks and the toadstones. 



M. de Beaumont thinks that traces of these dislocations are 

 to be found in the Malvern Hills, the neighbourhood of Briiito], 

 on the western coast of the department de la Manche, perhaps 



