88 



PALEOZOIC 



It will be seen from the map, scale i mile to the inch, 

 that the Niagara and Clinton limestone forms some large 

 outcrops on the islands and in the vicinity of the 

 shore near the northwest corner of lake Temiskam- 

 ing. This limestone affords stone suitable for build- 

 ing and for the production of lime, and on this account 

 should be of considerable value in the years to come, since 

 the rock is a somewhat rare material in most of this northern 

 part of Ontario. The district to the west and north is being 

 rapidly settled and will soon contain a large population 

 which will need much material for building purposes. The 

 following is an analysis of a sample of limestone taken from 

 Farr's quarry, Haileybury: 



Per cent. 



Insoluble residue 1.60 



Ferric oxide and alumina .66 



Lime 29.50 



Magnesia 2I -59 



Carbon dioxide 46.84 



Sulphur trioxide .70 



100.89 



This limestone formation extends northward, although 

 overlain by clay and similar deposits in many places, and has 

 been observed bv the writer along the south branch of the 

 Blanche river below what is known as the Mountain 

 portage. 



Considerable attention has been paid to the limestone 

 area, Sir William Logan having first described it years ago. 

 It has been shown that the series here is more closelv related 

 to the Niagara of Southern Ontario than it is to the Niagara 

 areas to the north and west. 



The cobalt-silver deposits being of pre-Cambrian age, the 

 Paleozoic limestone is of little interest in connection with 

 the ores. It is of course possible that ore-bearing rocks 

 underlie the limestone. 



Along the wagon road, in lots 5 and 6 in the third con- 

 cession of the township of Dymond, to the northwest of the 

 town of New Liskeard, the limestone cliff presents a striking 



