652 



Instances of twisted Strata 



Bottom of the rocks at Nant d'Arpenaz, to show the buttress-like projections that enclose the 

 lower part of the fall. The falls go down lower than the road, which is crossed by the 

 rivulet flowing from the falls into the Arve. a. The river Arve. Rise of strata to south. 

 Dip of strata to north. Inclination of strata east to west. 



indication of a far more singular and striking disarrange- 

 ment. 



About half a league farther, the scene is graced by another 

 most splendid fall, called Nant d'Arpenaz (Jig. 75. and 76.), 

 which comes down through a height of 800 ft. or 900 ft. in a 

 brilliant descent. When the air is calm, and there has been 

 a continuance of fine weather, the volume of water is by no 

 means considerable ; but after rain it is magnificent, and, if 

 by chance a brisk wind should be blowing up or down the 

 valley, the falling water is borne away along the surface of 

 the rocks, till it becomes an invisible mist, when by its depo- 

 sition it is again condensed and accumulated into another fall 

 of equal beauty, so continuing its descent into its rocky basin 

 below, whence it is carried, as the waters of Nant d'Orli are, 

 to the river Arve. The beauty of this fall is not its only 

 charm : for the extraordinary position of the strata near it 

 demands equal observation. Approaching it from Nant d'Orli, 



