THE OUTER-ALPS. 
65 
The Glarnisch and the Silbern also present a 
stupendous example of inversion, the strata being 
folded back upon themselves, so that we have Num- 
mulitic limestone at the base, followed by Jurassic 
and Cretaceous strata. 
I ought however to say that Rothpletz * has pro- 
pounded another explanation, based on faults and 
overthrusts, which however also involves tremendous 
changes. 
Klippen. 
I have reserved to the last the consideration of 
certain mountains, for instance the Mythen, Stanzer. 
* Geotektonische Probletne, 
Scenery of SwHzerland. II. 
5 
