14 GEOLOGICAL MEMOIRS. 



the neighbourhood of Baden, by Habsburg, Dentschbiiren, Kien- 

 berg, Laufeliingen, Oberdorf, and Reigoldzwyl as far west as Mel- 

 tingen in the Canton of Soleure. To the south of this fine range of 

 Muschelkalk, which indicates the principal hne of elevation in the 

 northern Jura, the high inclinations and inversions of the strata com- 

 mence, which contrast strongly with the more horizontal bedding 

 which prevails to the north. The first bore was put down at Ablecken, 

 west of Wysen, near the bend in the new road to Hauenstein, the 

 strata consisting of nearly horizontal beds of compact Muschelkalk, 

 the Friedrichshall limestone of Albert!. At a depth of 240' (Swiss 

 measure) white, grey, and black gypsum was passed through, which 

 continued to the depth of 480', frequently alternating with black 

 slaty clay, bituminous limestone, and hornstone. The water at this 

 depth contained 4 per cent, of salt. At the end of June 1848, at a 

 depth of 498', variegated marl with gypsum was bored through, per- 

 fectly indistinguishable from the marls of the Keuper. In the be- 

 ginning of July, somewhat deeper, small silicified Ammonites, belong- 

 ing to the upper beds of the Gryphite-limestone, were found in the 

 boring tools. It follows, therefore, that, notwithstanding the hori- 

 zontality of the beds at the surface at the spot where the bore is put 

 down, there is a total inversion of the masses, which has thrown the 

 Muschelkalk above the Keuper and the Gryphite-limestone. The 

 horizontality of the Muschelkalk is in fact confined to this locality ; 

 for through all the rest of its range the bedding is greatly disturbed, 

 and exhibits great faults and flexures within short distances. 



These results are in accordance with those obtained in 1834 from 

 the borings at Oberdorf, in the western prolongation of the Muschel- 

 kalk of Wysen, where at a depth of 580' the Keuper marls were 

 reached under the Muschelkalk*. Similar borings at Kienberg, in 

 Soleure, to the east of "Wysen, on the same Muschelkalk range, have 

 also failed ; but the author is not acquainted with further particulars. 



These discouraging failures did not deter M. Kohly from boring 

 afresh in 1850, to the eastward of Wysen, at the brook which flows 

 past Zeglingen. The spot chosen was in a valley, closed in to the 

 north by the Wysenberg with its highly-disturbed beds of Muschel- 

 kalk, and to the south by the Wysenfluh, on whose escarpment from 

 the base to the summit the whole series of beds from the Muschel- 

 kalk to the Great Oolite is exhibited. Up to June 1850 the beds 

 bored through were the following : — 



Feet. 

 Porous limestone (upper dolomitic division of the Muschelkalk) 152 



Compact Muschelkalk (Friedrichshall limestone) 156 



Coarse white and yellow marls, gypsum, and clay 78 



~386 



M. Kohly writes on the 12th November, 1850, that he had reached 



532', in a smoke-grey gypsum, alternating with black saline clay, 



sometimes bituminous, and with grey and yellow marl and limestone. 



While the present paper was in the press, the 200th Number of the 



* Bericht, ii. p. 51. 



