Miles and 
kilometres. 
49-I m. 
79-0 km. 
93°7 Mm. 
86-4 km. 
20 
The country continues to rise and becomes 
more rugged. Rugged hills of anorthosite with 
scarred faces are seen on either side. 
Ste. Adele. 
Ste. Marguerite—Alt. 637 ft. (194.2 m.) A 
mile and a quarter beyond Ste. Marguerite the 
railroad passes through a heavy cut in deep 
violet-coloured anorthosite, the walls of which 
as shown in the accomanying illustration, rise 
to a height of 50 feet (15-2 m.) on either side. 
From the railway track at the entrance to 
this cut a typical Laurentian landscape is seen 
Fine glaciated hills of anorthosite are observed 
as far as the eye can reach, many of them still 
possessing their original forest covering. The 
North river runs through the valley below. 
This point is well within the Morin anortho- 
site intrusion, being six miles from the nearest 
point on its margin. 
The rock is composed almost exclusively of 
labradorite, either reddish-violet or greenish in 
colour. The only other constituent present is 
ilmenite, of which an occasional small individual 
is seen in thin sections. The plagioclase is 
beautifully twinned and is filled with very 
minute schillerization products, which are the 
cause of its dark colour. The rock is practically 
free from all evidences of pressure. The anor- 
thosite in the cutting is coarse in grain and 
massive, and occasionally holds larger irregular- 
shaped individuals of labradorite, having cleav- 
age surfaces measuring as much as three inches 
(7-6 centimetres) across. It may be taken as 
typical of the anorthosite which forms the 
greater part of the intrusion and all the central 
portion of the stock. 
A quarter of a mile east of this cutting, and 
one mile from the Ste. Marguerite station, a 
rusty-weathering, garnetiferous variety of the 
anorthosite is exposed on the north side of the 
track. This contains, in addition to labradorite, 
a considerable amount of a pale green augite 
and ilmenite. It shows ina striking manner the 
