Sketch of the Thuringerwald. 00 



then, lOthly, zechstein, with its ordinary characters; 1 Ithly, 

 marno-bituminous schist ; 12thly, red sandstone (todlie- 

 gende) ; and lastly, porphyry, into which the gallery has 

 only been driven a few feet. The total length of this gallery 

 is 430 paces.* 



Basalt occurs only at some distance from the true chain of 

 the Thuringerwald, and forms some insulated mountains. 

 These are the Pflasterkaute, near Eisenach ; the Dollmar, 

 near Kiihndorf ; and the Steinsburg, near Suhl. 



• We again call the attention of our readers to M. Freiesleben's work, 

 entitled, " Geognostischer Beytrag zur kenntniss des Kupferschiefer<rel 

 birges, printed at Freyberg, in four parts, 1807 and 1816," and in whTch 

 the succession, the nature, and mode of existence of the diSerentsecondary 

 formations of the country of Mansfeld and Thuringia, are exposed and 

 developed by numerous and instructive details. A notice of these dif- 

 ferent formations has been given by the Count Dunin Borkowsky, in the 

 Journal des Mines, vol. 26, p. 182. (Note, Annales des Mines.) 



G 2 



