124 

 ANNOTATED GUIDE. 



Miles and Going in a northerly direction from King- 



Kiiometres. ston f or t h e fi rst thirteen 



o m. Kingston. miles, the road runs over 



O km. the flat-lying Ordovician 



sediments, whose general characters have al- 

 ready been described. 



13 m. At Loughboro Lake it passes onto the Pre- 



20-8 km. Cambrian area, and con- 



18 m. Loughboro Lake, tinues for 5 miles to Perth 



22 • 8 km. Road, where a fissure vein 



Perth Road. of white calcite carrying 



galena and zinc blende is 



being mined. This deposit was located in 



the early seventies, and was worked in a 



desultory fashion until 1875. It was then 



leased to an English company, which from a 



shaft 250 feet (76-1 m.) deep mined about 



2,000 tons of ore averaging 12 per cent lead, 



and 5 ounces of silver to the ton of galena. 



Following the strike of the vein northwest- 

 ward it passes into a swamp, but emerges 

 again after half a mile, at which point it 

 contains both zinc and lead. Moreover the 

 wall rocks have changed from gneiss on the 

 south side of the swamp, to crystalline lime- 

 stone on the north side, the contact lying 

 somewhere in the swampy ground. 



In 1880 a lead smelter was built in Kingston 

 to treat these ores, but after two years of 

 operation the property and smelter were 

 abandoned and remained so until two years 

 ago, when the present company took them 

 up. This company has rebuilt the smelter 

 and is treating domestic ores, lead refuse, as 

 well as the concentrates from their own mines 

 at Perth Road. They have traced the vein 

 farther northwestward and are developing 

 the property more thoroughly than was ever 

 done before. 



