306 CHARACTER OF THE COUNTRY 
keveagon Lake, and at various other points on that stream, and also that of the 
Bois Brulé River. It differs from that exposed on St. Louis River, which is made 
up principally of quartz pebbles, in being composed of materials derived in greatest 
proportion from the rocks with which it is immediately associated, and in conform- 
ing to the general colour of the formation. 
The trap rocks which cross Black River belong to the range which, continued in 
a northeasterly direction, crosses the Aminekan, and other neighbouring tributaries 
of the Lake, and which, at several localities, has been found to contain copper ores. 
At the Falls of Black River, copper ores were discovered several years since; and 
a mining company took possession of the “locality,” for the purpose of “ proving” 
them. After expending several thousand dollars in opening the “veins” and 
raising ore, the works were abandoned in 1848. The ores occur at this place at 
the junction of the amygdaloid with the greenstone trap, and also at the junction 
of the amygdaloid with altered shales and sand-rock. (See Nos. 482-488.) They 
occur in thin seams, which have a nearly north and south direction, and which can 
hardly be called veins. They are also disseminated to a considerable extent 
through the metamorphosed sedimentary beds, where they come in contact with 
the trap rocks. Two of the ores from this place yielded, on analysis, 10 and 11 
per cent. of copper respectively. 
In another part of this range, about a mile and a half from the Falls, on a small 
tributary of Black River, the La Pointe Company have a “location,” on which they 
have expended a large sum of money, in sinking shafts and proving the mine. 
Three shafts have been sunk on the vein, which has a course north 30° east, and 
south 30° west. At the time I visited the place, the shafts were filled with water, 
so that I had no opportunity for investigating the character of the vein further 
than surface indications would afford. Its character, in an economical point of 
view, however, may be determined from the fact, that the Company, after a fair 
trial, were forced to abandon it as unproductive. It is twenty-one feet wide, con- 
tains a great deal of epidote, and hades east 51°. 
No. 492 cccurs on a small stream near Russell’s old house, and in near proximity 
to the vein, which crosses at that point. The rock dips to the northwest at an 
angle of 37°. 
On the morning of the 6th of July, I proceeded to Fond du Lac Village, where I 
found Colonel Whittlesey, who had just returned from an excursion to the range 
north of the trading-post; and also the men who had been sent to La Pointe for 
provisions. The next day was occupied in making preparations for a reconnoissance 
of the north shore of Lake Superior, as far as Two Island River. 
On the 8th of July, we left Fond du Lac Village, accompanied by Mr. R. B. 
Carlton, in the capacity of assistant. We were detained at the Entry by high 
head winds until the afternoon of the 10th, and did not reach Two Island River 
until the 15th. The plan of proceeding directly to the most distant point for the 
commencement of our examinations, afforded us an opportunity of glancing at the 
rock formations as they are developed along the Lake shore, and thereby acquiring 
some general knowledge with respect to their character; and the information thus 
gained was afterwards found to be of the most essential service. The results of this 
