34 



are well developed. The complete series is best observed 

 near Kakabeka falls on Kaministiquia river. (6) It con- 

 sists of (i) iron formation, including taconite, jasper, 

 chert etc., (2) black slate, (3) grey quartzite with grey 

 slate and (4) grey argillite. This agrees substantially 

 with the sequence given by W. N. Smith (8) though the 

 nomenclature is slightly different. It however, omits the 

 basal conglomerate of L. P. Silver (9) as well as his thin 

 bedded, impure limestone, which apparently are to be 

 grouped with the iron formation. 



: 



. 8p - 



Slates exposed in Stewart and Hewitson's quarry, Port Arthur. 



This series is important economically, containing silver 

 veins and extensive deposits of iron ore. Heretofore the 

 iron deposits have not been so important in the Animikie 

 of Ontario as in the same formation in Minnesota and but 

 little mining has been done. Prospecting has however 

 revealed several deposits of good ore of greater or less 

 extent. In Port Arthur district, interest in this series has 

 centered chiefly upon the black slates in which nearly all 



