THE ENGADINE. 
245 
Fig. 152 shows that, as already mentioned, the 
valley of the Upper Inn is a trough. 
When we pass from the Granite of the Julier to 
that of Pontresina and the Rosatch we might at first 
suppose that the two banks of the Inn were in direct 
connection. This is however not so, but from Maloja 
to Scanfs the Inn runs in a trough of Schistose rocks, 
which separate the Julier from the outposts of the 
Bernina. They are principally Casanna Schists. 
The Lake of St. Moritz has Syenite on the west. 
Gneiss on the north, and Mica Schist on the south. 
At Celerina we come on the wide stretch of the 
Upper Inn which reaches to Scanfs. At Bevers is 
the opening of the wild valley of that name which is 
excavated entirely in Granite. The herbage is ex- 
cellent and the flora very rich, but the valley is un- 
inhabited in winter. It is almost inaccessible except 
at the entrance, the mountains surrounding it being 
extremely steep. 
During the Ice age the great glacier com- 
ing down from Pontresina probably blocked up 
the main valley to so great a height that those of 
the upper district from the Julier Alp, Val Fex, Val 
Fedoz, etc., were at one time driven over to Maloja 
and down the Val Bregaglia. Near Celerina is a mass 
of rock on which the church of St. Gian stands; it is 
