NORTHWEST OF LAKE SUPEBIOR. . 343 
The general aspect of the country is very much like that on the Grand Portage of 
St. Louis River. 
The greenstone (No. 416) was the only rock seen from the culmination of the 
ridge to the valley of the creek. It is the first rock exposed in the bed of Kine- 
chigakwag, where it is fine-grained, grayish-coloured, and contains occasional crystals 
of felspar disseminated through some portions of it. It is jointed, and as you 
recede further from the centre of the ridge, becomes bedded. The beds dip east- 
northeast, at an angle of 20°. About two hundred and seventy-five yards below 
where the portage crosses, there is a fall of sixty feet, in a series of cascades. Here 
the rock becomes finer-grained and slaty (No. 417), some of the beds resembling 
basalt very much in general appearance. The northeasterly dip still prevails. 
One hundred yards below the falls, a thinly-bedded slaty greenstone (No. 418), 
comes in. Some of the beds resemble quartz-rock, while others, in consequence of 
the presence of hornblende in grains, much of which is arranged in payallel lines, 
have the aspect of a hornblendic gneiss. In the mass, this rock resembles very 
much the greenstone against which it abuts, where they come together high up the 
ridge, and also No. 417, which overlies it; but as it recedes further and further 
from the axis of the ridge, it gradually changes, until it presents the ordinary 
appearance of a metamorphosed sandstone, approaching very nearly to some of the 
beds on St. Louis River and Mission Creek, which are entirely unchanged by 
igneous intrusions. 
Descending two hundred and fifty yards lower down, a metamorphosed siliceous 
shale (No. 419) is found beneath No. 418. It is very compact, has a conchoidal 
fracture, and is somewhat gritty to the feel. A few spots of a greenish-coloured 
mineral, probably epidote, are scattered through it. It resembles the metamor- 
phosed shales of Hat Point, below Grand Portage Bay, and is intercalated with 
beds of schistose quartz-rock. Just below this point, the creek is crossed by a 
dike of No. 419, about thirty feet in width. It is the centre of the first ridge 
mentioned in ascending from the Lake. It forms an anticlinal axis, and on the 
lake side, the dip of the bedded rocks is changed to the southeast. No. 418 is the 
first rock met with in descending the creek below the dike. 
Continuing to descend, No. 421 is found in contact with and resting on No. 418. 
It is an earthy-looking, siliceous rock, highly charged with chlorite, and contains 
small segregations of red felspar, which give the prevailing tint to the beds. _ It is 
difficult to decide on the exact nature of this rock, but from the best examination I 
was able to give it, I came to the conclusion that it is a metamorphosed sedimen- 
tary rock, similar in character to the metamorphosed shales of the regions about 
Baptism, Manitobimitagico, and Wisacodé Rivers. The siliceo-argillaceous shales, 
as well as the shaly sandstones, of this neighbourhood, contain numerous grains of 
felspar ; and these, under the modifying influence of the numerous trap dikes which 
intersect the rock in question, were probably segregated, so as to give it a porphy- 
ritic structure, and more of a felspathic appearance than the rocks about here ordi- 
narily present. 
For the distance of half a mile below this, the banks of the creek are composed of 
clay and marl beds, which conceal the rocks. 
