58 



Kiiomtues ^^^^ ^^^ V-shapcd cross-section of the post- 

 glacial channel. At this point the river enters 

 its .pre-glacial valley and flows southwards 

 into Upper Moyie lake, where the unexposed 

 fault between the Aldridge and Kitchener 

 formations is crossed. 

 322-9 m. Jerome — Alt. 2,997 ft. (911 m.). Just before 

 516-6 km. reaching Jerome the train passes through a 

 tunnel driven through the dark grey argillaceous 

 quartzites of the Kitchener formation, which 

 is also exposed in the numerous rock cuts 

 along the shore of the lake. At a point 2-3 

 miles (3-6 km.) west of Jerome the transition 

 rocks between the Aldridge and Creston form- 

 ations are exposed. 

 325-7 m. Half a mile (0-8 km.) farther west, the rocks 

 521 -I km. show numerous ripple marks and mud cracks. 

 Here also, the railway swings around the nose 

 of the northerly plunging anticline in which 

 Moyie valley has been eroded. The axial 

 part of the anticline is composed of the argilla- 

 ceous quartzites of the Aldridge formation, 

 while the radial portion is made up of Creston 

 quartzites. 

 328-6 m. Moyie — Alt. 2,997 ft. (911 m.). From this 

 525 • 7 km. point the plunging contact between the under- 

 lying reddish-brown weathering argillaceous 

 quartzites of the Aldridge formation, and the 

 greyish quartzites of the Creston, can be seen 

 on the mountain side to the west. This contact 

 is the same one noted on Upper Moyie lake. 

 On the hill to the east is situated the famous 

 St. Eugene silver-lead deposit, the value of 

 whose products, up to 191 1, amounted to 

 $10,394,520. From Moyie to Yahk the bed 

 rock consists of the argillaceous quartzites of 

 the Aldridge formation which are exposed 

 in the many rock cuts along the railway. 

 349-5 m. Yahk — Alt. 2,717 ft. (825-9 m.). At a point 

 559-2 km. I -9 miles (3 km.) west of Yahk the unexposed 

 conformable contact of the Aldridge and 

 Creston formations is crossed. This is the 

 same contact which was crossed on Upper 

 Moyie lake. 



