THE VAEAIS. 
135 
Gestelen to Baltschieder is a trough of Jurassic, at 
Baltschieder the gneiss appears again. 
At Mund the trough, which is somewhat to the 
south of the river, and dips to the south, again 
divides, and the two branches diverge; the southern 
takes the line of the Binnenthal, the Cries glacier, 
and the Bedrettothal, itself subdividing again on the 
way. Fig. 118 gives a section across the valley at 
Brieg. The northern synclinal has given rise to the 
valley of the Rhone, which follows its course. 
HeisenliO M.Moro 
Fig. 119 gives a section at Viesch. Denudation 
has here entirely removed the Secondary strata, 
though we may be sure that they must have formerly 
existed, since we find them along the valley both 
above and below. 
At Nieder Gestelen also is an old frontal moraine 
of the Rhone glacier, evidently deposited during its 
last retreat. 
The valley of Zermatt, which opens at Visp, lies 
