192 
SCENERY OF SWITZERLAND. 
Above Ilanz and below Chur the Verrucano is in 
its natural position, but between the two it is folded 
on itself. 
Fig- 136 gives a part of the double fold on the 
Sardona and the great rockfall at Films. 
From Hanz to Chur the river corresponds, not to 
a synclinal, but to an anticlinal zonej and if we con- 
sider its present position only it is difficult to under- 
stand the line it has taken. We must, however, 
endeavour to carry back our imagination to a time 
when It ran at a level say 2500 to 3000 metres 
higher. If we realise this and replace the strata 
which have been washed away, we should {see ante, 
p. 180) find ourselves in the fold at the base of the 
