57 



Miles and 

 Kilometres. 



294-7 m. Mayook — The mountain on the left (to 



471-5 km. the west) is composed of rocks of the Siyeh 



formation, and shows outcrops of Purcell lava. 



From Rampart (298 -8 miles, 498 km.) to Eager, 



(303- 7 miles, 506- 1 km.) the railway runs through 



the Isadore canyon, in which are exposed the 



Creston quartzites, and argillaceous quartzites. 



At Eager the railway runs in a south-westerly 



direction to Cranbrook. 



308-7 m. Cranbrook — Alt. 2,964 ft. (901 m.). Cran- 



493-9 km. brook is the thriving capital of East Kootenay, 



w^hose chief industries are mining, lumbering 



and agriculture. From this point the railway 



pursues a south-easterly course, crossing, near 



Cranbrook, the unexposed conformable contact 



of the Aldridge and Creston formations. 



At a point 3-3 miles (5-2 km.) west of 

 Cranbrook is an exposure of the hornblende 

 gabbro of the Purcell sills occurring in the 

 Aldridge formation. Beyond this the sill can 

 be seen outcropping in the steep cliffs on the 

 western side of the railway. 

 314- I m. Loco- 



500-9 km. Wattsburg — At Wattsburg, in the hill on 

 316-8 m. the east side of the railway, can be seen two 

 506-8 km. gabbro sills intruded into the Aldridge quart- 

 zites, which lie approximately flat. Half way 

 up the hill the quartzites are seen separating 

 the two sills. The valley which enters from 

 the west is the pre-glacial valley of Moyie 

 river, which at present occupies a narrow canyon 

 behind the hill to the south-west. From Watts- 

 burg the railway follows the pre-glacial valley, 

 which is eroded in the Aldridge formation. 

 The numerous rock cuts along the railway 

 expose the hornblende gabbro of the Purcell 

 sills. At the crossing of Moyie river, 2 - 8 

 miles (4-5 km.) west of Wattsburg, the pre- 

 glacial and post-glacial valleys can be seen. 

 The trough-shaped cross-section of the pre- 

 glacial channel here stands out in contrast 



