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occur also near the end of Matagama Point. A belt lies parallel to these 

 outcrops to the northward and runs, with breaks here and there, from near 

 the west side of Net Lake to Kokoko Lake. 



"Then there is an isolated belt stretching from near Cross Lake, north of 

 west, past the southern extremity of the south arm of Temagami to the south- 

 west arm of the same sheet of water, and to the westward outcrops are 

 found on Emerald Lake. A band, more or less broken, runs along the north 

 of Lake Wahnapitae northwest into and through part of the township of 

 Hutton." 



He adds that "in nearly all cases the iron ore, magnetite, is intimately 

 interbanded with jasper, which varies much in color in different parts of the 

 field. In some outcrops the magnetite is pretty massive, and if situated near 

 a railroad could apparently be worked profitably. The breadth of the band 

 of interlaminated material is sometimes 500 feet or more. It is at times 

 much bent and fractured, having been disturbed by igneous intrusions, and 

 some of these disturbed bands give evidence of being worthy of more careful 

 prospecting than we are able to do in the limited time at our disposal." 



Belts of iron-bearing rocks, like those described in this report, are found 

 also in Quebec, though up to the present little has been done in searching 

 them out. Mr. McOuat has reported from the eighth portage of the Quinze, 

 on the headwaters of the Ottawa above Lake Temiscaming, an ore which 

 forms "layers from the thickness of paper to about an inch, and is interlami- 

 nated with similar layers of whitish-gray and dull red fine-grained quartzite. 

 The iron ore constitutes probably from a fourth to a third of the whole, and 

 as the thickness of the whole band is about thirty feet, the total thickness of 

 the layers of iron ore would probably not be less than eight feet." This is 

 evidently the same type of deposit as those described from Ontario. 



Mr. A. P. Low describes jaspery iron ores which he compares with those 

 of Michigan, and also cherty iron carbonates from various points in Labrador, 

 and probably some of these occurrences are Lower Huronian, though from 

 his description it is clear that most of them are of Animikie age. 



From the statement just given it will be seen that bands of jaspery cherty, 

 or sandstone-like rock interbanded with magnetite, hematite, or limonite and 

 sometimes associated with siderite, occur from point to point across the 

 whole of northern Ontario, with lengths varying from a hundred feet to 

 twenty-seven miles. Almost all of the important areas mapped as Huronian 

 have more or less extensive belts of this rock, and in several cases isolated 

 patches or strips of it occur in the Laurentian, as if these were remnants left 

 when less resistant Huronian rocks had disappeared. These portions con- 

 tained in the granite are never red jasper, but generally cherty or quartzitic, 

 and the iron ore is magnetite, whereas in Huronian areas we generally find 

 jasper or granular silica with hematite or limonite. 



Associated with the iron formation rocks above mentioned, 



