70 
SCENERY OF SWITZERLAND. 
first suggested by Bertrand* that these mountains 
have been literally pushed into their present position; 
that they are the last remnants of a range which 
has disappeared. The range was once continuous 
or nearly so, the fragments remaining, though now 
towering over the surrounding plains, owe their pre- 
servation to having been originally in a deep trough. 
The “Klippen” attain still greater importance to the 
west, where they form the mountain groups of the 
Stockhorn and the Chablais. 
Hang** and Lugeoii have suggested that the 
strata have been forced to their positions from the 
Brian§onnais, before the elevation of the intervening 
mountains: that the whole of the Pre-Alps from the 
Arve to the Lake of Thun in fact is a vast zone of 
overthrusts from the other side of the range of Mont 
Blanc. No doubt the strata present very much the 
same aspect as those of the Brianfonnais, and 
were evidently continuous; but while the existence 
of an overthrust seems to be demonstrated, further 
evidence is still required as to the locality from 
which they were brought. 
Other great cases of overthrust extending for 
* Bull. Soc. Geol. France 1884. 
** Hang, U Origine des Pre-Alpes Romandes. 
