152 
SCENERY OF SWITZERLAND. 
and according to Baltzer they were thrown into folds, 
and these t\ro belts of Jurassic are two of the w’edges 
formed by the folds. Similar folds are shown in 
Fig. 1 20, but in that case have not been eroded. 
The valley itself, except just at Urvveid, is on gneiss, 
above the gneiss is Jurassic, and over that gneiss 
Engclhom 
Gneiss 
Fir,. 125.— Section showing the calcareous wedges of the Schon.alphorn 
in tlie Urbachthal, 
again. The same arrangement is well seen in the 
Urbachthal which joins the main valley at Hof. It is 
one of the most beautiful, as well as most interesting 
in the whole district. The bottom of the valley is of 
gneiss, the west side (Engelhorner) is Jurassic, rising 
to a height of 1900 metres, the right gneiss with 
however three bands of Jurassic (Malm) (Figs. 124, 
