291 



in order to show its analogy to a superposed 

 valley, a contraposed shore-line. 



Leaving Sidney channel, the steamer enters 

 Haro strait between Vancouver island and 

 San Juan island. To the east, the small 

 D'Arcy islands, composed of the Vancouver 

 volcanics, are seen, and to the west the retro- 

 graded inter-glacial deposits covering the south- 

 eastern part of the Saanich peninsula. To the 



Horizontal scale 5 S1 ■ ■ ■ g S P° /0 P ° f«*f 



Vertical scale exaggerated 2. times 



1 °°-'°'l Unstretified Vashon drift 



%^-^\ Stratified Cordova sands and gravels 



I I Stratified May wood clays 



Section exposed along the south shore of James island, illustrating relation of superficial deposits. 



southwest is a conspicuous monadnock, Mt. 

 Douglas, altitude 725 feet (220 m.), which 

 surmounts the lowland developed in the vicinity 

 of Victoria. 



Leaving Haro strait, the steamer passes 

 between Vancouver island and several small 

 islands, Discovery, Chatham, and Chain islands, 

 which are composed largely of the Wark gabbro- 

 diorite gneiss. Turning westward from these 

 islands towards Victoria harbour the route 

 follows for a short distance the great 

 transverse downfold occupied by Juan de 

 Fuca strait which lies between Vancouver 

 island and the Olympic mountains to the south. 

 The Olympic mountains, which are composed 

 largely of pre-Tertiary metamorphics similar 

 to the metamorphic rocks of Vancouver island 

 fringed by upper Eocene basalts and Miocene 

 sediments [2 and 14], seem to rise abruptly 

 from sea-level to elevations of 6,000 to 8,000 

 feet (2,000 to 2,500 m.), their serrated peaks 



35069— 2 B 



