OF PIGEON POINT. 399 
ning northeast into the Lake. Next succeeded a fine-grained basaltic trap (No. 
661), forty feet high; then a dike composed of coarse-grained trap in the centre and 
fine-grained trap adjoining. 
The next place of importance afforded a coarse porphyritic trap (No. 662), con- 
taining crystals of felspar, sometimes two inches cube; then pebbly beach, with 
narrow trap coming to the Lake in three places, the last a considerable point, nearly 
three miles from the mouth. Here a dike of basaltic trap, fifteen feet wide (Nos. 
665, 664, and 665), has carried up thirty-five or forty feet of slate on each side and 
altered it (No. 666). This dike continues several hundred yards. Next occurs a 
rock (No. 667), which may be termed a syenite, although there is very little quartz 
compared to the amount of felspar and hornblende. : 
Soon after, the shingle was so low that I could see across the cape, and, on 
stepping it, found the distance only about two hundred and twenty feet. Por- 
phyritic trap succeeds the low shingle, traversed north and south, at one place, by 
a narrow dike. Then follows a small bay of shingle beach, and again trap, twenty- 
five to fifty feet high, large-grained and porphyritic. The ridge here rises to one 
hundred and fifty feet, or more, and then gradually descends to thirty, twenty, and 
ten feet. Finally, a shingle beach, with a few greenstone rocks, in place, at the 
extreme end, terminates Pigeon Point. After turning in a direction south of west, 
and again passing the low shingle beach, a trap dike occurs (supposed, from the dis- 
tance and bearing, to be the same seen on the other side), altering slates on each 
side a long distance. Then succeeds a reddish-coloured rock (No. 668), even less 
syenitic than No. 667. 
The apparently metamorphosed rock (No. 669) was succeeded for a long dis- 
tance by shales, dipping 40° south-southeast, and exhibiting great signs of disturb- 
ance at one point, where a dike cuts through. Next follows some shingle beach ; 
then a fine dike, twenty feet high, cutting through and altering slates, which dip as 
before. Then follows another dike, fifteen feet wide, overlying the slates, which 
dip 40° to the Lake, in a southwest direction. This must be about three miles 
from the extreme point, as it is in sight of the islands which front Grand Portage 
Bay, and about a mile east of a bay, known as Morrison’s Bay, from its being the 
great fishing-station for a half-breed Indian of that name, belonging to the Grand 
Portage band. 
We soon after passed the calcareous vein seen on the other side. It bears 
northwest and southeast. There were here also several smaller veins. Near this 
place, the altered slates began to assume a columnar appearance, the columns being 
at right angles to the dip. T'wo dikes soon after appeared as the cause of the great 
local disturbance here, for, in their neighbourhood, the slates were entirely tilted 
on edge. (Specimens Nos. 670 and 671 were taken from this spot.) Farther on, 
the slates continue altered, and after passing a small bay, an east-and-west dike of 
trap, which projects into the Lake, has tilted the slates on each side to a high 
angle; the dike is, as usual, about fifteen or sixteen feet wide, while the slates are 
fifty or sixty. 
After crossing Morrison’s Bay, the dip of the slates is reduced to 18° and 20° 
south-southeast; but at a point not very far from there, they are again upright for 
a short distance. 
