BEUST ERZGEBIRGE. Jl 



On the Geology of parts of the Tyrol and Vorarlberg. 

 By M. GiJMBEL. 



[Proceedings Imp. Geol. Instit. Vienna, Feb. 12, 1856.] 



M. Gumbel's observations relate to the geology of the portion of 

 Tyrol and Vorarlberg included between the valley of the Rhine, the 

 crystalline slates of the principal Alpine zone, the Kaiserpass, and 

 the Bavarian frontier. M. Gilmbel has paid particular attention to 

 the " Flysch " and its analogues. He recognizes in the Flysch of the 

 Vorarlberg four well-characterized divisions. The first of them, called 

 by liim the " Inferior Alpine Slate," lies between the Verrucano and 

 Liassic Dolomite ; it belongs to the Triassic epoch, and contains no 

 other fucoids except the well-known Halobea Lomeli : gypsum, an- 

 hydrite, and rock-salt are imbedded in it. The second, M. Giimbel's 

 *' Allgau Slate," immediately overlies the Adneth Limestone ; its 

 fucoids, although similar to those of the Eocene Flysch, are speci- 

 fically diiferent from them : it contains Liassic Cephalopods, as Am- 

 monites radians, A. Amaltheus, &c. The spotted or Amalthean 

 Marls belong to this division. The third division is a Nummulitic 

 Flysch, comprising argillo-calcareous marls, with chert and glau- 

 conite, alternating with nummulitic beds. The fourth division ("In- 

 tricati Flysch") with Chondrites intricatus, C. fiircatus, &c., which 

 covers the nummulitic strata, must be considered as a deposit of the 

 second Eocene period. 



[Count M.] 



On the Metalliferous and Porphyritic Veins of the Erzge- 

 BiRGE. By Baron de Beust, Chief Director of the Mining 

 Department in the Kingdom of Saxony. 



[Proceedings Imp. Geol. Instit. Vienna, Feb. 12, 1856.] 



The subject of this communication is the metalliferous veins of the 

 Saxon Erzgebirge, with respect to the porphyry-veins associated with 

 them. Baron de Beust thinks that the phsenomena of the diffusion 

 of metalliferous minerals in the region in question, and generally 

 through the whole of Europe, may be grouped under some few very 

 simple laws. Four lines of elevation may be distinguished in the 

 metalliferous mountains of Saxony and North-west Bohemia, — 

 namely, the Erzgebirge line (W. to E.), the Sudetian line (W. to E. 

 or more exactly 300" to 120''), the Bohmerwald line (345° to 165°), 

 and a fourth line (S.W. to N.E.). The porphyry-veins in Saxony 

 and in the adjacent countries run in a direction conforming to one 

 or other of these four lines ; the more important of them, which are 

 connected with the carboniferous basins of Saxony, offer a remarkable 

 parallelism with these lines ; and the same circumstance may be ob- 

 served in the direction of the metalliferous veins in the Erzgebirge, 

 especially in those of the Freiberg district, so that both porphyritic 

 and metalliferous veins may be correctly admitted to stand in the 

 mutual relation of cause and effect. Baron de Beust points out the 



