as advocated by M. Elie de Beauviout. 139 



lias marls and sandstone, as well as the lower Jura limestone, are 

 placed horizontally upon the keuper, which seems to occur in 

 cavities of muschelkalk, and this last is itself covered here and 

 there by the keuper. Near Blumenroth tiie upper part of the 

 keuper, with a subordinate bed of magnesian limestone, has been 

 upheaved. 



The Fichtelgebirge and Bohmerwaldgcbirge are connected 

 with the Thu ringer wald by the Frankenwald ; and Von HofF 

 mentions that the strike of the beds of this last chain is from 

 N.E. to S.W., a fact which is also shewn by all geological maps. 

 (See Taschenbuch d. Mineral, of Leonhard, vol. vii. part i. p. 151. 

 et 159.) In the Fichtelgebirge and Western Bohmerwaldge- 

 birge, the direction of the strata is from E. N.E. to W. S.W., 

 and the upheaving and upturning seem to have been antecedent 

 to the deposition of the older coal formation in Bohemia and 

 Bavaria. On the other hand, the Olympic system is the oldest 

 in Greece, and, according to MM. Boblayeand Virlet, it has af- 

 fected only the primary rocks. 



The direction nearly from N.W. to S.E., is that of many 

 other chains of hills, as the Bleking in Scandinavia, a part of the 

 Hartz, the hills of A.lvensleben, the floetz chain in Westphalia, 

 the hills in Lusatia, a part of the Riesengebirge, the hills of 

 Southern Silesia, the chain of Southern Poland, the older part 

 of Sicily according to Hoffman, &c. The epochs of these ranges 

 of hills are very different from the epoch which, in the opinion 

 of M. de Beaumont, is characterised by this particular direction. 



The seventh system of elevation is that of Mount Pilas in the 

 Forez, of the Coted'Or, and the Erzgehirge. It would also in- 

 clude the Cevennes and the table-lands of Larzac. M. de Beau- 

 mont finds traces of it from the Elbe to the Dordogne, and in- 

 vestigates its influence on the peculiar distribution of cretaceous 

 deposits, and in so doing points out considerations similar to 

 those offered in my Geological and Paleontological Memoirs 

 (vol. i. p. 48-50, and p. 53-56.) 



The direction of this system is from N.E. to S.W., or from 

 E. 40° N. to W. 40=' S., pretty similar to the direction of the 

 first system. This boulversement is supposed to have taken 

 place between the deposition of the Jurassic formation and the 

 commencement of the cretaceous epoch. 



