184 
SCENERY OF SWITZERLAND. 
It will be seen, therefore, that the folds are very 
complex. The Eocene, the most recent formation 
of all, is at the very base, and the folds have, in 
some cases, completely squeezed out particular strata. 
To the east of the Glarnisch is the Silbern, where 
Heim has found a similar structure, but even more 
magnificently developed. 
WiNDGALLE. 
The Windgalle group have been admirably de- 
scribed by Heim. The strata have not only been 
folded by pressure acting in a direction nearly north- 
east, but actually for a distance of 1 to 2 miles 
thrown back upon themselves (Fig. 133). The 
Porphyry, though an eruptive rock, is much more 
