326 Professor Sedgwick and Mr. Murchison^ on the 



4. Fine, bluish and greenish, micaceous sandstone, -with many irregular partings, contain. 



ing a few fragments of slate clay, and, here and there, large carbonized stems, not 

 parallel to the beds, but lying in all directions 20 feet 



5. Slaty, brown and bluish, micaceous sandstone ; the bands, here and there, much charged 



with coaly matter, surmounted by fine, grey, micaceous sandstone 25 feet 



It is difficult to convey a clear notion of such a succession of beds by mere 

 verbal description^ or to determine their exact place in the series : but when 

 examined on the spot^ we were inclined to consider them of the tertiary age^ 

 because they admitted of a very close comparison with the lower^ carboni- 

 ferouS;, tertiary strata^ which we had seen in some other parts of Bavaria. We 

 however regard their place as doubtful. 



Still further to the norths above the village of Haselstauden, a great ravine 

 lays bare a series of nearly vertical beds, among which a hard, green, micaceous, 

 sandstone is seen to alternate with, and pass into, a coarse conglomerate. 

 Among the blocks which had rolled down from the mountain side, were some 

 in which the cement was highly calcareous. Many of these masses exactly 

 resemble the most ordinary, tertiary rocks of Bavaria. A green, micaceous 

 sandstone, not to be distinguished from the molasse of St. Gall, then begins 

 to predominate ; and near a place called Fehlen, beds of this kind are seen to 

 dip S.W. at about 50^ 



On the south side of the mountain, which extends from Obersdorf to Schwart- 

 zach, the dislocations of the strata add greatly to the difficulty of drawing any 

 exact line of separation, between the secondary and tertiary formations : but 

 on the north flank of the mountain the groups recover what may be considered 

 their natural position ; and near Schwartzach may be seen dipping at a high 

 angle of inclination, towards the north. From the last-mentioned place the 

 tertiary beds are prolonged, above the villages of Reichenbach and Wolforth, 

 to the hills on the Ach above Bregenz ; and in this whole range dip to a point 

 about magnetic north. They are extensively cjuarried ; and in their mine- 

 ralogical character exactly resemble the fine, green, micaceous molasse of the 

 opposite ridges of St. Gall. Though varying considerably in texture, they 

 seldom pass into a conglomerate form. Sometimes they exhibit traces of car- 

 bonaceous matter ; and we have seen specimens of lignite, derived from this 

 part of the formation in the hills south-east of Bregenz. 



The united thickness of the whole succession of the tertiary beds, we have 

 been describing, must be very great. Respecting that of the inferior, disturbed 

 strata, it is difficult to form any correct estimate, nor do we pretend to define 

 their limits : but some notion may be formed of the thickness of the molasse. 



