104 



The town of North Bay (population about 

 8,000) is a divisional point on the Canadian 

 Pacific railway, and also the southern terminus 

 of the Temiskaming and Northern Ontario rail- 

 way. Both the Grand Trunk and Canadian 

 Northern railways have lines into the town. 



ANNOTATED GUIDE. 



NORTH BAY TO TEMAGAMI, COBALT AND HAII^YBURY. 



Miles and 

 Kilometres. 



For 64 miles (103 km.) north of North Bay, 

 as far as the station of Doherty, the railway 

 crosses a monotonous succession of Laurentian 

 gneisses, which in many areas are characterized 

 by a strikingly banded structure. Generally 

 speaking these gneisses may be said to consist 

 dominantly of pink or light grey bands, and 

 subordinately of dark-colored or black bands, all 

 having the composition of granite, save some of 

 the darker types. Regarding the age relation of 

 the light-colored and dark-colored bands, it may 

 be said that the former are seen in some cases to 

 be intrusive into the dark bands, but that more 

 often it is difficult or impossible to determine 

 what the relation is. The dark bands are cer- 

 tainly in part elongated fragments of Keewatin 

 greenstones. Both dark and light bands are 

 injected by pink granite and pegmatite, either 

 parallel with or cutting across the schistosity. 

 0.0 m. Leaving North Bay the elevation of which is 



0.0 km. 654 ft. (199.4 m.) the railway climbs a heavy 

 grade for 21.5 miles (34.7 km.) reaching an 

 elevation of 1,290 ft. (393.3 m.) above sea level, 

 that being the highest point on the track in the 

 479 miles (772.5 km.) which separate Toronto 

 from Cochrane. For about a mile (1.6 km.) 

 from North Bay the banding of the gneisses is 

 very striking. The darker bands contain 

 biotite or hornblende. To che east of the rail- 

 way for a few miles the gneisses become in 



