36 



KUomlu-es exposcd. They consist almost entirely of lime- 

 stone, usually massive, and often cherty and 

 crinoidal; towards the top of the series a 

 considerable thickness of hard, whitish, cal- 

 careous sandstones occurs. The fossils collected 

 from this neighbourhood are mostly character- 

 istic Devonian forms but some of the species 

 represented are known to occur in the Carboni- 

 ferous. While there is an apparent thickness 

 of nearly 10,000 feet (3,048 m.) of these rocks, it 

 is probable that there is a repetition due to 

 compressed and overturned folding, and that in 

 reality the total thickness does not greatly 

 exceed 3,500 feet (1,067 ^n-) [!]• 



209-6 m. Crowsnest — Altitude 4,449 ft. (1,356 m.). 



337*3 km. The summit of the Rocky mountains is reached 

 at Crowsnest station at an elevation of 4,449 

 feet (1,356 m.) above sea level, being one of 

 the lowest passes in the Canadian Rockies. 

 The western approach to the pass being much 

 steeper than the eastern, the railway descends 

 to the valley of Michel creek by a remarkable 

 loop crossing the south fork of that stream at 

 McGillivray station. From Crowsnest to 

 McGillivray the rocks seen belong almost 

 entirely to the limestone series with two small 

 infolds of the dark-coloured Jurassic Fernie 

 shales. 



216-3 m. McGillivray — 



348- 1 km. 



GEOLOGY OF THE REGION ABOUT CORBIN. 



From McGillivray the Eastern British Columbia railway 

 branches off, following up the south fork of Michel creek 

 for a distance of 16 miles (25 - 7 km.) to the town of Corbin. 

 For most of the way it runs in a wide valley, underlain 

 by the Fernie shales, in which rock exposures are infrequent. 

 Tent mountain and Mount Taylor, to the northeast and 

 southwest of the line respectively, are composed of the 

 coal measures overlying the Fernie shales, and occupy 

 small synclinal basins to the east of the main Crowsnest 

 basin. 



