a he —. Pee ae 
Perio ae ia: acticin Bite lg Ni Bl 7 













LAKE OF THE WOODS—HURONIAN. 5 

eastward, has no representative there, and must run out in that direc- 
tion. 
73. North of this, and forming the eastern point of the Small Promon- | 
tory, hard greenish and blackish hornblendic spotted rocks appear. They 
have astrike of N. 67? E, and are vertical. Small ramifying epidotic 
veins occur, cutting through them in all directions. Rocks similar in 
appearance, also spotted, and much altered, are again seen on the strike of 
these, in the bay to the south-west of the Small Promontory. They have 
a dip of N. 53° W. < 50°, and probably belong to the same series, which 
appears to be one of rather fine-grained, but much altered conglomerates. 
These stand in place of the vast thickness of conglomerate rocks occur- 
ring to the east. The eastern part of the conglomerate belt apparently 
absorbs the slate band last referred to, and by its great increase in thick- 
ness deflects northward the next slate band, in its eastern extension. 
74. At a distance of a little over five miles from the Small Promon- 
tory, the conglomerate belt covers a breadth of two and a half miles, the 
angle of dip throughout being very high. Where crossed from south to 
; north in that region, the component beds present the following lithological 
. characters and attitudes.—Hard gneissic altered rock, strike N. 80° KE. 
Hard altered conglomerate with some quartzite, strike N.79° E. The 
two last species of rock are very frequently associated, and in some locali_ 
ties, one even seems to pass into the other. Hard dark-grey rock, which 
resembles a quartzite, but has minute hornblende and mica crystals deve- 
loped in it, and shows the forms of original pebbles differing from the 
matrix in being felspathic. A little further north, grey highly altered 
conglomerate of gneissic appearance. This continues for some distance, 
and then changes to less altered conglomerate with much siliceous matter” 
in its composition, and grey in colour. Strike N. 60° E., with a dip at a 
high angle to the south. This rock constitutes the northern edge of the 
conglomerate belt now in question. 
75. The eastern end of the next belt, which is of highly altered 
slate, runs into the first bay north of the Small Promontory. It is not 
of great width, and appears to narrow eastward, where it bends 
northward to pass round the convexity due to the thickening of 
the conglomerate belt just described. The eastern portion is a soft 
thin-bedded hornblendic schist, composed chiefly of black hornblende and 
white quartz, with but little felspar. It includes a few compact grey 
lenticular masses, which may have originally been pebbles, and seem to 
assimilate it to the conglomerate. At the place examined, it had the some- 
