NO. 5 PRE-DEVONIAN PALEOZOIC FORMATIONS 333 



Feet Meters 



I c. Massive-bedded, steel-gray, hard, rough-weathering 



limestone 500 -|- 152.4 -|- 



Section cut off by an E. and W. fault and over- 

 thrust. 



Total Sullivan 775 + 236.2 -f 



Of the 500 feet (152.4 m.) of la, 125 feet (38.1 m.) 

 were measured and 375 feet (114.3 m.) estimated. 



Fragments of fossils occur in many layers of lime- 

 stone, but none was identified as to genus and species. 



SiFFLEUR River Section 



The Siffleur River heads on the north side of Pipestone Pass i8 

 miles (29 km.) north of Lake Louise Station on the Canadian Pacific 

 Railway. It flows north through a canyon valley for 22 miles (35.4 

 km.), then west for 5 miles (8 km.), and thence to the Saskatchewan 

 River at the southwest side of Sifileur Mountain.* 



At Pipestone Pass, the Pipestone limestone of the Devonian forms 

 the eastern ridge down to the lowest part of the Pass, and the super- 

 jacent Banff shale forms the western side up to where the overthrust 

 Lower and Middle Cambrian strata form high cliffs that extend north 

 for 20 miles (32.1 km.) on the west side of the Siffleur River. On 

 the eastern side, the Pipestone limestones form high, sharp ridges 

 for 16 to 18 miles (25.7 to 28.9 km.), and then the Ozarkian, and 

 Upper and Middle Cambrian limestones rise with a southwest dip in 

 high cHffs facing west and north above the Siffleur River (pi. 85), 

 and a, canyon valley through which a small stream from the north 

 flows to the Siffleur. The westward dipping Middle Cambrian strata 

 on the west side of the Siffleur are broken by an east and west fault 

 about 20 miles (32.1 km.) north of Pipestone Pass ; they rise towards 

 Siffleur Mountain with a southwest dip and expose to view the Lower 

 Cambrian quartzites at the northern base of the cliffs facing Siffleur 

 River and Mountain. These cliffs with the ridges and peaks above 

 form a mountain mass east of Mount Murchison from which they 

 are separated by a canyon extending south from the Saskatchewan 

 Valley ; on the south side the mountain mass is defined by a strong 

 deep canyon that cuts westward from Siffleur canyon, and heads near 



^ The Canadian Land Office maps show the Siffleur River flowing directly 

 north to the Saskatchewan on the eastern side of Siffleur River, but the river 

 turns due west and flows 5 miles (8 km.) along the south base of Siffleur 

 Mountain before turning north to the Saskatchewan River. There is an old, 

 probably preglacial, channel that crosses eastward from the bend of the 

 Siffleur to Whiterabbit Creek that the land survey presumably mistook for the 

 canyon of the Siffleur River. 



