222 



Miles and 

 Kilometres. 



8-9 m. 

 14-2 km. 

 from Rev- 

 elstoke. 



14-7 m. 

 24-8 km. 



21 • 1 m. 

 33 • 8 km 



Clanwilliam station. — Alt. 1,812 ft. 

 (552 m.). The rock-cuts here afford excellent 

 exposures of a dominantly sedimentary phase 

 of the Shuswap terrane. Paragneisses, mica 

 schists, quartzites, and subordinate limestones 

 (cut by granite sills) are flexed into an anticlinal 

 fold pitching to the west. Tonkawatla creek 

 and the deep col at the divide are located in the 

 heart cf this fold. The stratigraphic place of 

 the sediments in the Shuswap series is not clear. 

 The older beds are much like the Tonkawatla 

 formation, and the quartzites have striking 

 resemblance to the Chase formation exposed 

 near Shuswap village. The still younger mica 

 schists overlying the quartzite may represent 

 the Salmon Arm formation. (See p. 124.) 



At the western end of Victor lake, 2 kilometres 

 west of Clanwilliam, a 200-metre sill of biotite 

 granite has been thoroughly sheared and its 

 femic constituents, especially the mica, have 

 been segregated in thick, black bands. This 

 strikingly banded orthogneiss is a result of 

 dynamic metamorphism which is comparatively 

 seldom exhibited in the Shuswap terrane. 



From Three Valley station to Sicamous 

 (45 • 1 mis.) the line runs through a field of 

 orthogneisses cutting rarely exposed, rusty mica 

 schists, probably of sedimentary origin. Strong 

 jointing and the fissility of the schists are con- 

 ditions which have led to extensive land-slides, 

 visible at and for some kilometres beyond 

 Three Valley. 



Mitikan Siding — Alt. 1,300 ft. (396 m.). 

 To the south may here be seen a high bluff 

 seamed with many pegmatitic and aplitic sills. 

 From a more commanding position their 

 number in this slope has been estimated to 

 exceed two hundred ; their thicknesses range 

 from 1 metre to about 200 metres. They cut 

 rusty crystalline schists which are in part 

 sedimentary, enclosing occasional thin beds of 

 limestone. 



