MINERALS OF HUDSON BAY AND NORTHERN CANADA. 245 



iron on Great Slave Lake. Copper ore had been met with on Hudson Bay, and the native 

 metal, which from private accounts appeared to exist in great quantities, had long been 

 known to occur on thé Coppermine River, which flows into the Arctic Sea. Lead ore was 

 abundant in the vicinity of Little Whale River and Richmond Grulf, on the East-main 

 coast. Zinc, molybdeuvim, antimony and manganese had also been collected in different 

 parts of the regions under consideration. The galena of Richmond Gulf contained silver, 

 and this metal was also found in iron pyrites in the same part of the country. Nuggets 

 of native silver were washed out of the gravel, along with those of gold, on the upper 

 waters of the Peace River. Gold had been detected in veins on the East-main coast, and 

 in quartz from Repulse Bay ; and alluvial gold had been obtained in streams among the 

 mountains to the west of the lower part of the Mackenzie River. This region, for various 

 reasons. Dr. Bell regarded as the most promising one yet known in the Dominion for the 

 precious metals. He thought that even the gold of the drift deposits, which are cut 

 through by the Saskatchewan River at Edmonton, and for a distance above and below it, 

 might have been originally derived from this c^uarter, although a number of years ago he 

 originated the idea that the gold of these drift deposits may have come from Huroniau 

 strata, which might exist to the north-east. Large areas of these I'ocks have since been 

 discovered on the north side of Athabasca Lake ; still he considered it quite as likely 

 that the Edmonton gold had been derived from the western side of the Mackenzie valley. 

 It was certain, from various facts which he mentioned, that it had not come down the 

 Saskatchewan River itself from the Rocky Mountains. 



II. — Notes on Observations, 1883, on the Geology of the North Shore of Lake 

 Superior. By A. R. C. Selwyn, LL.D., F.R.S., F.G.S. 



(Read May 21, 1884.> 



The author stated, briefly, the result of observations made on the stratigraphical rela- 

 tion of the great columnar masses of trap which form the summit of Thunder Cape, Pie 

 Island, McKay Mountain and other hills in the vicinity, and which have been designated 

 the " crowning overflow," and considered to be newer than the rocks of the Nipigon and 

 Keeweenian series. It was stated that, while those named are clearly a part of the Aui- 

 mikie series, there are other similar flows at a much higher horizon, such as those at Red 

 Rock and in the hills on the north side of Nipigon Bay. Further, that no evidence of 

 unconformity could be found from the base of the Animikie series to the top of the Kee- 

 weenian, as developed between Thiinder Bay and the east end of Nipigon Bay, where, in 

 certain islands, the red and white rocks of the Nipigon series are well exposed in contact 

 with the dark argillites of the Animikie series, with, in some cases, intervening layers of 

 vertically columnar trap, probably diabase, but similar to that of Thunder Cape, etc. 

 Between Silver Islet and the islands above named, the Animikie series appears to be com- 

 pletely overlapped by the Nipigon, and has not been certainly recognized, anywhere to 

 the east of Nipigon Bay. 



