102 



ANNOTATED GUIDE. 



SUDBURY TO NORTH BAY. 

 Miles and 

 Kilometres. 



439.2 m. Just east of the station at Sudbury there is a 



708 km. hill of gabbro. Beyond this a conglomerate, 

 called the Ramsay lake conglomerate, outcrops 

 all along the north shore of the lake for two 

 miles. This conglomerate overlies a quartzite 

 which occurs toward the easterly end of the lake. 

 432.2m. (Altitude 841 feet). The quartzite is well 



697 km. exposed around Romford junction, showing the 

 beds of the stratified rock clipping about 45 

 degrees S. 

 431. m. The Mond Nickel Company have erected a 



695. km. copper-nickel smelter about one mile south of 

 Coniston to treat the nickeliferous pyrrhotite 

 ores from Victoria mines and other properties. 

 Just east of Coniston a tongue of greenstone 

 crosses the track. 

 427.1m. (Altitude 799 feet). Near Wanapitei station 



689. km. there is a contact of die quartzite and Laurentian 

 gneiss to the east. This contact follows for 

 some distance the northeast-southwest course of 

 the Wanapitei river. Between Wanapitei and 

 Sturgeon Falls the railway follows a series of 

 valleys in the Laurentian. In these valleys are 

 several towns about which there are small areas 

 of good agricultural land. All the rock exposed 

 along the railway east of Wanapitei is Lauren- 

 tian gneiss. 

 383.3m. (Altitude 687 feet). At Sturgeon Falls 



618. km. the water power is utilized by a mill in the 

 manufacture of pulp from spruce wood which is 

 floated down the Sturgeon river. Reddish 

 Laurentian gneiss is well exposed about the 

 dam at the pulp mills. 

 360. m. (Altitude 654 feet). For a few miles west 



580. km. of North Bay the railway skirts the north shore 

 of Lake Nipissing, which is 90 miles long 

 and 20 miles wide. Immediatelv west of North 

 Bay the Laurentian is concealed by a covering 

 of drift. 



