p. 101

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111 Geology—Primitive District

[the origin of the native copper found scattered as perfectly all over the Territory will probably be found with it].
According to Cleveland Serpentine
is associated with primitive and transition rocks, and
exists in beds in gneiss, mica=slate, and argilliite; so
that in any part of the primitive district of our
Territory we may expect to find it. Granular
Quartz constitutes the Falls of Pickagama on the
Mississippi; and Gemstone, having sometimes a
columnar structure is formed on the St Croix [river?]
commencing twenty four miles above the lake,
and constituting the rocky glow at the Falls.
The mineral distinct of Lake Superior which is now
beginning to attract so much attention lies mostly in
Michigan between the Montreal river and Kewena [Point?]
and therefore does not properly require a description here.
Its geological character is entirely different from the Wisconsin
lead and copper district.

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