CHURCHILL AND NELSON RIVERS. 3^7 C 



of the upper division of God's Lake, green mica and hoi-nblende scliist 

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



The Iluronian strata are hirgely developed around the western partHuronian 



/I r 1 1 T I J 1 * • • • y-w 1 Strata around 



ot island Lake, and they occur again at its eastern extremitj'. On the Island Lake, 

 shores of the narrow ba}', 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 tlie south side, in the entrance of Pipestone Bay, a long narrow 

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

 grey calcareous, slightly crystalline steatitic schist are associated withSteatiticnchist. 

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

 about S. 8. 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 difterent localities Laurentian 



trnGiss- 



ofHuronian rock which have just been described. The same rock is 



also found about the outlet of the lake, but at a ])oint on the northern 



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



bv the siliceous schist-conorlomerate which is so largely developed at , , . , 

 -^ ^ & ./ 1 Schi3t-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 veiy 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 cjuartz, together with many of iron pyrites. The dip in this 

 neighbourhood is northward 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 i?neiss. 

 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 



