98 REPORT OF THE SPECIAL COMMITTEE 



A portion of the party went north from Port Arthur to see the 

 green-schist and granite series. This was found, but seen only in 

 small volume at the particular area visited. At other times several 

 members of the party have visited larger areas of this green-schist 

 and granite complex north and northwest of Port Arthur in Gorham, 

 Conmee, and other townships, and in the green schists they found an 

 iron-bearing formation analogous in character to the Soudan for- 

 mation of the Vermilion district. The granites are intrusive in the 

 greenstones. 



At no place were the relations between the graywacke slate series 

 below the Animikie and the green-schist granite complex observed. 



In the original Huronian area — i. e., the area described by Logan 

 and Murray as extending from near Sault Ste. Marie along the 

 north shore of Lake Huron to Thessalon and northward — we 

 examined a number of crucial localities. At the first of these, about 

 five miles from Sault Ste. Marie, near Root River, we studied the 

 relations of the conglomerate, mapped as lower slate conglomerate by 

 Logan, with the granite. The conglomerate is in a vertical position. 

 We found the upper horizon of the conglomerate near the road to be 

 of moderate coarseness, and to contain many fragments of green schist, 

 greenstone, and granite. The granite fragments increase in promi- 

 nence and size toward the north, and at the north end of the exposure 

 we have a great granite conglomerate. After an interval of a few paces 

 we found to the north a red granite similar to many of the fragments 

 of the conglomerate. The party has no doubt that the conglomerate 

 rests unconformably upon the granite. This conglomerate, while 

 mapped by Logan as lower slate conglomerate, appears to be above 

 a limestone next to be mentioned, and has been connected by Van Hise 

 and Leith with rocks like the red quartzite belonging above the lime- 

 stone, and they believe it to be the upper slate conglomerate rather than 

 the lower slate conglomerate, although the overlapping recent lake 

 deposits prevent the connection by actual areal tracing. A short 

 distance east of the point where the conglomerate is next to the granite 

 and north of the great mass of the conglomerate is a belt of limestone 

 which continues east for perhaps half a mile. North of this lime- 

 stone is conglomerate, and still to the north, granite. This northern 

 conglomerate is very similar to the conglomerate south of the lime- 



