47 

 Third Day. 



Leave Sudbury early in the morning by a branch of the 

 Canadian Northern railway running 5 miles (8 km.) north 

 and east to Sudbury junction, crossing a plain of old lake 

 deposits (Algonquin) and rounding the hill of laccolithic 

 gabbro in the eastern part of Sudbury. Near Sudbury 

 junction quartzite may be seen to the south and east. 



At Sudbury junction the Sudbury branch joins the main 

 line 261.7 miles (421.1 km.) north of Toronto. 



From the junction the line runs northwest through 

 quartzite for two miles, followed by greywacke and green- 

 stone, until the basic edge of the nickel eruptive is reached. 

 Here the line turns north, passing Garson lake, which is in 

 the micropegmatite phase of the eruptive. The whole width 

 of the eruptive at this point is 2^2 miles (4 m.), and the 

 norite and micropegmatite are like those seen at Levak. 



Passing the hilly acid edge of the eruptive and the Trout 

 lake conglomerate, the flat interior plain of sand and silt 

 deposited in a bay of lake Algonquin is entered. To the 

 south, east and north can be seen the rugged inner rim of 

 the nickel eruptive. 



At Hanmer, 271.8 miles (347.4 km.) north of Toronto, 

 a hill of Onaping tuff rises to the east, and a mile or two 

 north black slate is seen near Onwatin lake. 



The railway now follows the valley of the Vermilion 

 river. To the west there is a high terrace of fluvio-glacial 

 gravel, and at mile 273 the beach gravels of lake Algonquin 

 are used for railway ballast. 



Near mile 278 tuff may be seen passing into conglo- 

 merate at the northern side of the basin, and just beyond 

 there are the usual hills of the " acid edge." The basic or 

 norite edge of the nickel eruptive occurs at Nickelton 

 junction, where the Nickel Range railway runs 4 miles 

 (6.4 km.) east to Whistle mine. 



To the north of the junction the railway enters the 

 Laurentian, crossing coarse red granite and granitoid gneiss, 

 with bands or larger areas of green schist or greenstone as 

 far as Sell wood junction at mile 284.3. 



From Sell wood junction a branch runs 5 miles (8 km.) 

 northwest to Sellwood, where the Moose Mountain iron 

 mines will be visited. 



