Miles and 
kilometres. 
86-9 m. 
139-8 km. 
95:8 m. 
154:°2 km. 
129-0 m. 
207-6 km. 
27 
A short distance west of L’Achigan 
river the anorthosite is cut by a great dyke 
of a nearly black gabbro which can be followed 
to the north for nine miles. It is strikingly 
jointed and possesses a very marked streaked 
or foliated structure parallel to its length. This 
direction coincides with that of the foliation 
of the intruded anorthosite. This gabbro holds 
inclusions of the anorthosite and further north 
sends a long apophysis into the anorthosite, 
cutting across the strike of the latter. It is 
very basic in character and under the micro- 
scope displays a most remarkable cataclastic 
structure, larger twisted remants of the con- 
stituent minerais being embedded in a mass of 
finely granulated material derived from the 
breaking down of the larger individuals of the 
several constituent minerals. 
The train now returns to Montreal via 
St. Jerome. 
Ste. Sophie—Alt. 251 ft. (76-5 m.) Expo- 
sures of a typical orthoclase gneiss of the 
Laurentian, as well as a small band of lime- 
stone belonging to the Grenville series, are 
seen where the road running west from Ste. 
Sophie crosses a little stream near the outskirts 
of the village. 
St. Jér6me—Alt. 308 ft. (93-9 m.) 
Montreal— 
BIBLIOGRAPHY. 
1. Logan, W. E. and 
Hunt,T. Sterry— Reports of Geological Survey of 
Ze Hunt, 
Canada, 1852-58, 1863, 1869. 
T. Sterry— ‘On Norite or Labradorite Rock”’: 
A. POUT. Se1., 1970. 
