142 



Miles and 

 Kilometres 



lower slopes, a series of yellowish weathering- 

 crystalline dolomites which probably represent 

 the Castle mountain series of the Laggan 

 section to the south. 



Fraser river is incised in the rocks of the lower 

 part of these Cambrian sediments, and the 

 mountains to the west seem to have little of 

 the upper series on their summits. The structure 

 of the mountains at the watershed is that of a 

 shallow syncline of the coarse grained siliceous 

 detrital matter, their lower slopes showing finer 

 grained deposits of the Bow River series, while 

 their summits preserve the dolomites of the 

 Castle Mountain seiies. 



1,079 m. Mount Robson station — Altitude 3,106 ft, 



1,736 km. (947 m.). Mount Robson, viewed from the 

 Fraser valley, towers high above the neighbour- 

 ing mountains. I ts beds are flat lying and show 

 a section of nearly 10,000 feet of strata. These 

 strata form the subject of a special enquiry 

 by C. D. Walcott of the Smithsonian Institution. 



1,095 m. Tete Jaune — Altitude 2,400 ft. (731-5 m.). 



1,762 km, 



TOFIELD TO WINNIPEG, 



Introduction. 



Tofield is 752 miles (1,209 km.) west of Winnipeg and 

 stands at an elevation of 2,289 feet (697 m.) above sea 

 level. 



Between Tofield and Winnipeg the railway traverses a 

 rolling or level prairie country underlain by horizontal or 

 gently inclined Cretaceous and Palaeozoic rocks. The 

 following are the formations represented: — 

 [Edmonton series. 

 Cretaceous^ Belly River series. 



[Pierre shales. 

 Devonian. 

 Silurian. 

 Ordovician. 

 The country generally is so covered by a veneer of 

 glacial drift that accurate boundaries between geological 

 series can rarely be laid down. The Edmonton seiies ex- 



