202 THE VEKMILION IRON-BEARING DISTRICT. 



flank of the hill north of No. 8 shaft. Several good exposures occur also 

 along the road leading from the top of the hill to the compressor, and also 

 near the top of the hill on the right side of the tramway leading to the 

 compressor. 



On the south shore of Vermilion Lake in the SE. J of sec. 20, T. 62 

 N., R. 15 W. on the point between Swede Bay and Vermilion Lake there 

 are a number of exposures of the iron formation in close association 

 with the later sedimentaries. Indenting the northeast shore of this point 

 there is a small bay, on the west shore of which (almost due west of a 

 small reef of conglomerate) there is an exposure of jasper. This jasper 

 exposure is only about 75 paces across and is extremely plicated, showing 

 a number of distinct anticlines and synclines with axes striking east and 

 west and plunging east at the high angle of 80°. On this exposure there 

 are also some beautiful examples of friction lireccias on a small scale. 

 Following this exposure inland we pass over several other jasper expo- 

 sures showing nothing of especial interest, so far as the iron formation itself 

 is concerned, but lying above the iron formation here and there we find a 

 patch of conglomerate derived from it and showing distinctly its relation- 

 ship to the underlying jaspers. About halfway across the point we reach 

 a place where a considerable area of the jasper is exposed. At this point 

 the jasper is extremely plicated, like that upon the shore. The axes of the 

 plications strike about N. 75° E. and form an arc of an oval whose long 

 axis trends N. 75° E. It seems very clear that we are at this place just 

 east of or near the apex of a small east-west anticline. A conglomerate 

 lies around the jasper, bordering it, with an occasional patch still remain- 

 ing on the top, and hence lying in the midst of the jasper area. The 

 conglomerate has its greatest development to the north, Avhile to the south 

 the slates are most common. 



Grbod exposures near the North Lee pit on Lee Hill, northeast of Tower, 

 offer excellent opportunities for a study of the relations between the green 

 schist and the jaspers. A green chloritic schist is exposed in a practically 

 solid mass for about 125 paces to the south, then follows the jasper, and 

 again, north of the jasper, comes the solid greenstone for something like 75 

 paces, where an alternation of jasper and green schists begins, eventually 

 followed, still farther north, by a large mass of greenstone. The schistosity 

 in the schists strikes east and west. Nearest the main mass of the jasper the 



