54 
SCENERY OF SWITZERLAND. 
Sentis Mountains and the Lake of Walenstadt. 
The Sentis group and the Churfirsten occupy the 
triangle between the Lake of VValen and the Rhine. 
They are formed mainly of Cretaceous strata with a 
mantle of Tertiaries at their feet. 
The Sentis Mountains occupy the northern and 
wider part. They trend from N.E. to S.W. The 
N.E. end consists of six ridges, due to as many 
folds, the ridges being often Urgonian : they gradually 
coalesce a little north of Wesen into two, the 
Goggeyenberg {with the Hadernberg), and the Matt- 
stock (Fig. 83), and finally to one in the Kupfenstock. 
The ridges are generally anticlinal, but the highest 
summit is at the place where two synclinals meet one 
another. In the Churfirsten, which overlook the Lake 
of Walen, the strata (P'ig. 26) are folded into a com- 
plete S. The configuration of the surface has been 
less affected by denudation in the Sentis than in most 
other Alpine districts.* 
From the Sentis Mountains a glacier formerly 
streamed to the N.W., occupying the country between 
the Sitter and the Thur. The Walensee is a long 
valley originally due to a trough-like depression, the 
* Heim, Mech. d. Geb. vol. II. See however Rothpletz, 
Geotektonische Prohlerne, 
