iS 
A. Winchell on the Animike in Minnesota. 
this formation continuous. The surface rises in a succession of 
parallel, interlocking high ridges, all having the same aspect as 
the cliffs on the shore. At about half a mile, the slate begins to 
be interstratified with layers more or less inclining to a micaceous 
slate. Continuing northward in the expectation or finding mica- 
schist fully developed, gabbro suddenly appears in a thin bed 
covering the crest of the hill, and concealing the formation un- 
derneath. 
T, C5 N. R. 3 W. MINN. 
1 ^ i:R.^i>i"a-^ 
i .^rC'® 1 
Fig. I. Outline of Gunflint lake, with the exclusion of the eastern ex- 
tremity. 
The American territory covered is from the government plats. The 
section lines of the American survey are extended over the Canadian 
territory, and the principal features of the Canadian shore have been 
located by means of bearings taken from points fixed by the American 
survev. 
Westward from 1353, the vertical schists can be traced nearly 
to the head of the little bay, where the Animike-covered oppo- 
site shore is not over one eighth of a mile distant. Eastward from 
1353, the vertical slates rise in high cliffs for half a mile, and 
the formation is traceable, sometimes capped with gabbro, to 
near 1355, where it strikes inland, leaving the shore occupied 
by Animike. In this distance of a mile and a half from the 
head of the bay, the iron-bearing shales of the Animike rise 
