Fig. 1. Sketch Map of Crystalline Rock Areas, 
Northern Piémeont. 
ad 
Me beefed 
ys 719 
wD Ea t 
PV=pietre verdi: O=diorite; gr= granite; por =porphyrite ; 
sy =syenite ; s=peridotite and serpentine; gn=gneiss ; 
MS = mica-schist. Del. Dd 
3173 
\ Pir Vatletta277t 
Pt Ruse 
iP 100,009. 
Fig. 2. Section of Grivola Ridge, Grajan Alps. 
PS=Permo-Carboniferous schist; 'MS=mica-schist; 
D=diorite; CL =crystalline limestone ; CS =calc-schist ; 
Pr=prasinites. 
