354 



DESCRIPTION OF THE COUNTRY 



eight feet thick, but which is probably a metamorphosed rock, and this again by a 

 basaltic bed (No. 320). In the bottom of this bay is a low exposure of rock (No. 

 321), which seems to have been in a state of semi- fusion since its deposition, and 

 subjected to partial flowing movements. It is a metamorphosed argillaceous shale, 

 and contains small fragments of other rocks. It underlies the bed just noticed. 

 The surface of this rock is planished in the direction of the dip, which I suppose to 

 be the effect of present causes. From this point to the mouth of Kinewabik River, 

 the shore is made by metamorphosed sedimentary rocks. Just above the mouth of 

 Bitobig River, however, there is an uplift, and they are seen resting on a bed of 

 trap. At the mouth of Kinewabik, they are also overlaid by a bed of No. 320. 



Between Knife Island and Kinewabik River, several faults occur on the lake-shore, 

 which, if not observed, would add very materially to the apparent thickness of these 

 deposits. The following section shows one of these faults. 



The beds of shaly rock vary from four to twelve feet in thickness, and are some- 

 times separated by layers of a harder and more compact rock (No. 318), which 

 resembles the sand-rock beds intercalated with the shales at other places. These 

 rocks are generally capped by a bed of trap. (No. 319.) 



6. Kinewabik River. — This stream was examined to the distance of four miles 

 above its mouth. For the first three and a half miles, it runs nearly south, and 

 for the last half mile, southeast by east. About three miles above the mouth, it 

 forks. The west fork only was examined. 



The first rocks met with in ascending the river, are metamorphosed, siliceous, 

 and argillaceous shales (No. 346), alternating with thin beds of basaltic rock (No. 



347) . I estimated these beds to be four hundred feet in thickness. A mile and a 

 half from the Lake, the shales present the characteristics of slaty greenstone (No. 



348) , and resemble precisely those of Kinechigakwag Creek. Some of the beds are 

 slightly conglomeritic, and others show fine lines of deposition with remarkable dis- 

 tinctness. The lower beds are somewhat amygdaloidal. Above these rocks (which 

 are about fifty feet thick), is a reddish-coloured, coarse-grained, metamorphosed 

 sandstone, with thin beds of slaty greenstone (Nos. 348, 349), intercalated. The 

 thickness of these last beds was estimated at one hundred feet. They rest against 

 a greenstone dike, bearing northeast and southwest, which was the last rock seen 

 in situ on the river. 



Beyond the dike, however, a great many fragments of unaltered argillaceous 

 slate were seen in the river-bed, some of which were entirely too large and thin to 

 have been transported any great distance. This leads to the conclusion, that beds 

 of the unaltered slate, which is like that of St. Louis River, are in place at no dis- 



h 



a 



b 



a, a, a. Trap beds. b. Metamorphosed shales, c. Fault. 



