102 



-. McConnell, R. G... .Summary Report, Geol. Surv. of 



Can., 1894, pp. 32-35 A; 1895, 



pp. 22-32. 

 -. Report of Commission appointed to investigate the Zinc 



Resources of British Columbia. 



Mines Branch, Dept. of Interior, 



Can., 1906. 

 -. LeRoy, O. E Summary Report, Geol. Surv. of 



Can., 1910, pp. 123-128. 



THE SIMILKAMEEN DISTRICT. 



Midway to Spence's Bridge. 



BY 



Charles Camsell. 



INTRODUCTION. 



The Similkameen excursion leaves the route of Excursion 

 C2 at Midway, and after proceeding westward along the 

 valley of Similkameen river turns northward at Tulameen 

 towards Nicola river, and at Spence's Bridge, where this 

 stream enters Thompson river, it again joins the route of 

 Excursion C2. 



This route of this excursion lies almost entirely in the 

 Interior Plateau region of British Columbia, and an excel- 

 lent opportunity is afforded of viewing what is one of 

 the main physiographic features of the province of British 

 Columbia. The characteristic features of mature topo- 

 graphic outline in this region are believed to have been 

 produced by sub-aerial erosion acting throughout Eocene 

 times, though they have been somewhat modified by sub- 

 sequent events which include regional elevation, vulcanism 

 and glaciation. The region is underlain by sedimentary 

 and volcanic rocks ranging in age from Carboniferous to 

 Miocene, the older of which have been intruded by batho- 

 lithic igneous rocks. 



The chief points of scientific and economic interest which 

 it is the object of this excursion to visit are: the gold 

 bearing arsenopyrite deposits of the Nickel Plate mine, 



