148 
SCENERY OF SWITZERLAND. 
the summit of the Ferden Rothhorn. Though now 
therefore rising into mountains, they are really a 
closely compressed and folded trough. * 
Fig. 123, representing the upper part of the 
Faldum Rothhorn, gives a vivid idea of the compres- 
sion, contortion, and crushing which the mountain has 
undergone. 
The remarkable, and long inexplicable, fact that 
on the Jungfrau and the Monch the far more ancient 
gneiss overlies tlie Secondary Calcareous rock, is due 
to the existence of these great folds in the strata. 
The west flank of the Jungfrau, as seen from the 
Ebnefluh, shows a great band of Calcareous rock 
lying on and covered by gneiss. 
* Felleuberg, 2. Gw/. /sT. d. Sckw., L. xxi. 
