95 



From Arrowhead to Revelstoke the Shuswap series 

 consists largely of orthogneisses with minor developments 

 of mica schists, quartzite and crystalline limestone intruded 

 by later dykes of pegmatite and aplite. The rocks are much 

 disturbed and faulted as shown by discordant strikes and 

 dips. In places the strike parallels the valley, in other 

 cases it lies at right angles to it. 



ANNOTATED GUIDE. 



Nakusp — The upper terraces behind the town represent 

 in part the delta deposits of Kuskanax and Nakusp creeks. 

 The low delta face of the former creek has extended well 

 into the lake. Ten miles (i6 km.) up the Kuskanax are 

 a series of hot springs, as yet but little known, though 

 readily accessible by trail. 



St. Leon — St. Leon marks the junction of two streams 

 in modified V-shaped valleys. The upper delta terraces are 

 about 200 feet (60 m.) above the lake. About one mile 

 (16 km.) inland hot springs occur. 



Halcyon — At Halcyon are the most noted of the hot 

 springs which appear at intervals along the east side of 

 Upper Arrow lake. There are two adjoining springs about 

 1,700 feet (518 m.) inland and 400 feet (122 m.) above the 

 lake. The water flows from two orifices in biotite gneiss at 

 a temperature of 124° F. (68-8° C.) with an estimated flow 

 of 300 gallons per minute. An analysis made by J. F, 

 King in the laboratory of the City Analyst, Edinburgh, 

 March 3, 1898, showed the water to contain the following 

 ingredients expressed in parts: 



Chlorine 8 



Sulphuric acid 363 



Silica 74 



Lime 84 



Alkalies as soda 5 



Magnesia 232 



Lithia o 



Sulphuretted hydrogen 32 



14 

 43 

 29 



57 

 71 



86 



Looking w^est from Halcyon across the lake a range is 

 to be seen in which are many lofty peaks with glaciers and 

 snowfields. This range extends to near Revelstoke where 



