155 



Ei'^metres pegmatite. The various stages in magmatic 



stoping are well illustrated in this interval. 

 115-2 m. Minaki — Altitude 1,048 ft. (319-6 m,). Win- 

 184-3 km. nipeg river, the largest stream crossed by th's 

 section of the railway, is crossed just east of 

 milepost 115. 

 129-4 m. Redditt — Altitude 1,071 ft. (326-6 m.). Be- 

 207 km. tween milepost 149 and 152 the gneiss has 

 been sliced into thin parallel plates from an inch 

 (2 - 5 cm.) to several feet (i m.) in thickness, 

 apparently as a result of yielding to stresses. 

 168-9 m. Mcintosh — Altitude 1,228 ft. (374-5 m.). 

 271 -9 km. From milepost 154 to milepost 169 the railway 

 follows the south shore of Canon lake, a typical 

 example of the rocky lakes characteristic of the 

 Pre-Cambrian region. The country here is 

 unusually rugged and a number of short tun- 

 nels occur on the railway. 

 177-4 m. Ouibell — Altitude 1,178 ft. (359-2 m.)- Dur- 

 283-8 km. ing Glacial time portions of Wabigoon River 

 valley were probably ponded and received de- 

 posits of stratified clay similar to those laid 

 down in the larger glacial lakes. This lacustrine 

 deposit first appears on the railway near mile- 

 post 172, where the boulder clay changes in 

 somewhat transitional manner to stratified clay. 

 From this point to milepost 185 the finely 

 laminated clay is almost continuous; between 

 mile posts 175 and 181 it forms a comparatively 

 level plain, resembling, on a small scale, the 

 prairie region of the west. 

 206-4 m. Richan — Altitude 1,285 ft. (391 -9 m.). Lau- 

 330-2 km. rentian gneiss is again abundantly exposed from 

 the eastern edge of this clay deposit to milepost 

 224, where it becomes obscured by glacial ma- 

 terials. 



At -4 mile (-6km.) east of milepost 223 a 

 deep cut has been made in a hill of imperfectly 

 stratified sand and gravel. 

 231 -7 m. Webster— 1,234 ft. (376-3 m.). Between 

 470-7 km. mileposts 217 and 234 the route skirts the 

 northern margin of a terminal moraine and 

 outwash deposit which extends southward. The 

 country north of the railway is scantily clad 



