CHURCHILL AND NELSON RIVERS. 3*7 C 



of the upper division of God's Lake, green mica and hornblende schist 

 was met with, dipping W. N. W. < 50°. 



The Huronian strata are largely developed around the western part Huronian 



^ J x strata around 



of Island Lake, and they occur again at its eastern extremity. On the island Lake, 

 shores of the narrow bay, which runs west from the vicinity of the 

 outlet, the following rocks were found : dark grey felsitic schist with 

 fine lines of stratification ; dark grey glossy calcareous schist ; grey 

 finely ribboned siliceous slate, felsitic and highly calcareous ; grey 

 felsitic silicious slate, and a felsitic slate of an olive-grey color. The 

 strike varies from S. *70° to S. 80° W., and the dip is northward at 

 various angles from 45° upwards. 



On the south side, in the entrance of Pipestone Bay, a long narrow 

 arm, opening off the lake at eighteen miles from the outlet, beds of a 

 grey calcareous, slightly crystalline steatitic schist are associated with Steatitie schist, 

 dark greenish-grey felsitic and hornblende slates. Here the strike is 

 about S. S. W. Tobacco pipes are carved by the Indians out of the 

 steatitic rock. 



Along the south side of the next bay, or at a distance of twenty -four 

 miles south of the outlet, the principal rock is a green epidotic horn- Green schists, 

 blende schist. Associated with this are dark green finely crystalline 

 hornblendic and dioritic schists. The dip here is N. 20° W. at a con- 

 siderable angle. 



Laurentian gneiss occupies the shore between the different localities Laurentian 



° r gneiss. 



of Huronian i-ock which have just been described. The same rock is 



also found about the outlet of the lake, but at a point on the northern 



side, four miles south of the outlet, the Huronian system is represented 



by the siliceous schist-conglomerate which is so largely developed at Schist . con _ 



the east end of Oxford Lake. A grey quartz-rock is found on the next glomerate. 



prominent point, four miles south-east of the last. Further up the 



shore, or sixteen miles from the outlet, a very dark grey diorite was 



met with, and at about twenty miles the rocks consist of soft grey 



schist with harder varieties of the same color full of grains of clear 



vitreous quartz, together with many of iron pyrites. The dip in this 



neighbourhood is noi'thward at high angles. Fine grained greenish 



gneiss, having the same dip, was met with two or three miles further 



east. This may be either Huronian or Laurentian. To the eastward of 



it, the ordinary grey Laurentian gneiss was found all along the shore Grey gneiss. 



as far as the bay at the head of the lake. 



On Iron Island, which lies close to the north shore between the two 

 localities of Huronian rocks last described, Mr. Cochrane found dark 

 green serpentine, with calcareous joints, along with a hard fine-grained, Serpentine- 

 semi-crystalline rock of a deep green color, as if due to the presence of 



