354 TRANSACTIONS OF THE CANADIAN INSTITUTE. (VoL. VIII. 
have all suffered such intense metamorphism and such extensive erosion. 
that it is impossible to trace the structures with any degree of satisfaction, 
but it is possible that a more rigid investigation of the region might show 
that the structure could be best represented by an anticlinorium, with the 
anticlines all truncated by erosion. Within the banded silica and jasper 
the folding and crumpling is very elaborate, and shows the application of 
pressure from several directions. In some cases the jasper is folded 
while the slate on either side of it is not, and in a few cases the slate is 
folded while the jasper interbanded with it, shows no sign of folding 
on the surface. These conditions may be explained by supposing the fold- 
ing occurred in different planes or that often the jasper folded while the 
slate, being a softer rock, mashed and sheared, instead of folding. 
There are some fine bands of iron formation in the region but the 
percentage of iron in them is low. A number of analyses were made by 
A. G. Burrows, Provincial Assayer, of specimens from various parts of 
the ranges, and the results were quite disappointing, as scarcely any of 
them showed enough iron to make any parts of the ranges of commercial 
value. 
DISTRIBUTION OF THE IRON RANGES. 
There are three prominent outcrops of the iron formation, one west of 
Lake Wendigokan, another on Still Lake, and one northeast of Watson 
Lake. Besides these, there are a number of lesser outcrops occurring 
in various parts of the region, but they are unimportant. The outcrop 
west of Lake Wendigokan is of considerable proportions and lies in loca- 
tions HF 13, 12 and 10. It is composed of grey slate and jasper in parts 
very finely banded and the highest assay of specimens taken was 36.56 
per cent of iron in hematite. Much of the mass lies under swamp and 
drift; part of the latter having been removed by trenching, but the part of 
the iron formation exposed is so hard and so low in iron that these qualities 
combined with the absence of any particularly favorable geological con- 
ditions preclude any possibility of finding an ore body associated with 
this outcrop. The jasper becomes greatly mixed with schist before running 
into the eruptive sheet to the west, and also at the east end before dis- 
appearing under the drift. Just south of this outcrop and in location 
HFir there is a small mass of banded magnetite and jasper very similar 
to that found in the southern range near Poplar Lodge. | { 
On Still Lake in the old location BTor, there is a large outcrop of 
ironrange. A large portion of it is excluded from view by drift and swamp, 
ut it extends through from Still to Whitefish Lake, and although at either 
b 
