14 T. S. Hunt on Alpine Geology 
this structure, the summits of al] of these being composed of , 
newer strata, beneath which, on either side, dip the older for- 
n, therefore, geologists of authority from iI 
of the valleys on either side, and even declared them to be 
ltered sediments of the tertiary period, it was difficult to. 
regard Mont Blane as any thing Sa than a synclinal moun- © 
