94 
Miles and 
Kilometres. 
79:5m. ‘The extremely close folding sometimes seen 
127:2km.in the impure Grenville limestones, is well 
shown by an exposure in the bank of the Ottawa 
river. At 200 feet (61 m.) north of the river 
bank, a dyke of binary granite, 200 feet (61 m.) 
wide and continuous with that seen at the rail- 
way station, cuts the limestone. 
Pagmatite ODrorite and mica schist 
Section in the Pre-Cambrian at Papineauville, Que., north side of railroad. 
The slight rise from the river to the level 
of the village is due to the same sea-cliff which 
was noticed from the train. Its capping of 
Saxicava sand is very evident in the streets of 
the village. 
80 m. On turning north from the village, exposures 
128 km. of coarsely crystalline Grenville limestone, cut 
by pegmatite dykes, occur along the road. A 
broad band of this limestone, more especially 
developed on the east side of the road, is cut at 
many places by pegmatite dykes and also by 
dykes which may be called gabbro-pegmatite. 
80.4m. A band of richly garnetiferous gneiss is visi- 
128.5 km. ble on the right side of the road, and farther 
to the west are exposures of a granulitic bath- 
olith, which extends in the direction of Plai- 
sance. The garnet-gneiss is followed by a tongue 
of the granulite, and this by another small ex- 
posure of richly garnetiferous gneiss. 
80.8 m. Leda clay covers the succeding flat area, ex- 
129.5 km. posures of the granulite occurring to the west 
and of limestone to the east. 
G2 it. Grenville limestone cut by pegmatite dykes 
131.5 km. is seen to the right of the road. 
82.6 m. The Leda clay has a slight capping of Saxi- 
132.2 km. cava sand. 
