MODE III. LIMESTONE. 443 



Hients have afterwards been united into bricias, 

 which are very common in this kind of rock. 



In a softer state these beds have been con- Contorted. 

 volved, in various contrasted forms. " Saussure 

 cites many examples of these heaps of calcareous 

 beds, which are contorted in such a manner as 

 evidently to show that they have been bent by 

 the effect of the force which parts of the same 

 beds, in a higher situation, have exerted against 

 them. 



" Among others, he observed this effect in 

 three different places, on the borders of the lake 

 of Lucerne. The one near the mouth of the 

 Reuss : * The bent beds/ says he, ' are of a grey 

 compact limestone > they rise from the lake in 

 a vertical position ; they then bend towards the 

 south-west, and on that side become concave. 

 To the north-east, on the side of their convexity, 

 a hollow presents itself. 



' On closely examining these beds, they are 

 found to be very much broken, and appear to 

 have been so in the act of bending, and even by 

 the force that bent them.' 



" The second place is half a league to the 

 northward of the preceding, likewise on the bor- 

 der of the lake, of Lucerne, on which Saussure 

 sailed : it is a mountain called Axenberg. c From 

 the summit to the foot of this calcareous moun- 



