198 



Kilometres. Stephen and Mt. Dennis. This is called the 

 Stephen-Dennis fault. 



Two miles (3-2 km.) west of Field the 

 Kicking Horse river becomes a narrow channel 

 and in one place passes under a natural bridge 

 formed in the Upper Cambrian shales and 

 slates. 



[-3-5 m, Emerald— Alt. 3,895 ft. (1,188 m.). There 



1 5-6 km. are over 300 feet (91-5 m.) of Pleistocene 

 from Field. lacustrine gravels along the sides of the 

 Kicking Horse valley. The Canadian Pacific 

 Railway Company has erected a gravel-washing 

 plant at the station, the gravel being used for 

 ballast after the clayey material has been 

 washed out. 



On the north side of the valley five distinct 

 terraces can be recognized in these gravels 

 along the valleys of Emerald creek and the 

 Amiskwa river. 



For the next four miles (6-4 km.) Kicking 

 Horse river has a broad alluvial flood plain, 

 nearly two miles wide in places. 



Looking ahead to the right of the railway 

 red-capped peaks and ridges in the Van Home 

 range are seen. These red-weathering shales, 

 slates, metargillites and phyllites belong to 

 the Chancellor formation of the Upper 

 Cambrian, and overlie those beds exposed 

 on the top of Mt. Bosworth at the divide. 



On the south side of the railway in the Otter- 

 tail range, these shales and slates are overlain 

 by the massive Ottertail limestone which forms 

 precipitous slopes. The accompanying figure 

 shows a gentle slope on the Chancellor shales 

 and a very steep slope in the Ottertail limestone. 

 Some of the peaks in this range are capped 

 by Goodsir shale, the lowest formation in 

 the Ordovician. The very sharp contact 

 exposed in Mt. Goodsir in the Ice River valley, 

 between the Cambrian, represented by the 

 Ottertail limestone and the Ordovician repre- 

 sented by the Goodsir shales, is shown in another 

 illustration page 180 (8). The fauna in those 



