Abandoned Shore Lines of Lake Superior. — Taylor. 87 1 
that the top of the backwall of this notch is about 660 feet 
above the lake. The level of the rock shelf below is about 
600 feet above the lake. It is not certain that this is a shore 
line, but its form and place are suggestive. None of these 
shore lines, however, were seen to advantage, for the country 
is rough and heavily timbered. Manitou island, which lies 
oft' the extreme point, was probably all submerged at the 
Nipissing stage. We landed on the west end of it and found 
there a massive conglomerate including rounded boulders four 
and five feet in diameter. There are also many faults 
of small displacement cutting through the pebbles and 
boulders. 
On the north side of Keweenaw point, a line series of shore 
lines was found back of Eagle Harbor. One at an altitude of 
170 feet above the lake is a finely formed shingle ridge with 
a depression behind it. and there are several others almost as 
well developed on the steep slope below. Above this highest 
ridge are two terraces related to a stream which comes out of 
a deep ravine at this point. The lower terrace is about ^<H> 
feet, and the other about 'I'lO feet, above the lake, both prob- 
ably old deltas. In driving across the peninsula from Lac la 
Belle to Eagle Harbor, faint semblances of terraces were no- 
ticed near the Delaware mine; and about a mile west of it, at 
about 580 feet, some gravel deposits which resemble beaches 
in their composition. But we did not see their form, and it 
is doubtful whether any of them are shore lines. 
Duluth. At Dulutli we visited the locality of Prof. Law- 
son's highest beach at the top of the Seventh Avenue Inclined 
railway. We did not find the highest beach very clearly de- 
veloped, but the one next below is well marked. We saw 
them at a disadvantage, however, as a dense fog was prevail- 
ing at the time. We went about a mile farther back to High- 
land Park and saw there other gravel ridges about 100 feet 
above Prof . Lawson's highest. From the brief examination 
which we were able to give them, it seems probable that they 
are of glacial origin, lint our observations were too hurried 
to be decisive. From Duluth I returned eastward alone, vis- 
iting several localities on the south coast in search of the high- 
est beach. On the long, gradual ascent from Superior east- 
ward over the red clay plain only a few faint marks of shore 
