NO. 5 PkE-DEVONIAN PALEOZOIC FORMATIONS 3OI 



of the limestones of the Mount Whyte formation and continuing up 

 to the massive limestones of the Cathedral formation, which form the 

 summits of Storm Mountain on the east and Mount Whymper and 

 Boom Mountain on the west and northwest. 



The Mount Whyte formation on Mount Whymper has a few layers 

 of oolitic limestone interbedded in bluish-black, thin-bedded limestone 

 in which I found a few fragments of trilobites. The Hmestones 

 measure about 60 feet (18.3 m.) in thickness. 



At no point within 5 miles (8 km.) southwest of the Pass do the 

 limestones reach the canyon bottom, and the Olenellus gilherti and 

 0. canadensis zone is 1,000 feet (304.8 m.) or more up on the sides of 

 the mountains. 



Mount Temple Section 



On the southwest end of Mount Temple at Sentinel Pass, the Mount 

 Whyte formation is reduced to its minimum known thickness, and 

 the St. Piran is largely a siliceous shale. The Mount Whyte formation 

 is overlain by massive-bedded limestones. 



LOWER CAMBRIAN 



Mount Whyte Formation „ , ,, , 



reet Meters 



1. Thin-bedded, impure, bluish-gray limestone 22 6.7 



2. Greenish arenaceous and siliceous shale in massive beds. 107 32.6 

 Fauna. — (63g) : Obolus, small and large species. 



3. Thin-bedded, dirty gray arenaceous limestone 3' 6" i.i 



4. Cross-bedded, gray sandstone 5' 6" 1.7 



5. Coarse, reddish and gray calcareous sandstone with 



numerous fragments of Olenellus 23 7.0 



6. Greenish siliceous shale 3 .9 



7. Reddish-brown and gray sandstone, with some layers 



nearly calcareous and almost made up of fragments of 



Olenellus 7 2.1 



Total Mount Whyte formation 171 52.1 



St. Piran Formation 



Alternating bands of gray quartzitic sandstone and greenish 

 and gray siliceous shale. Several hundred feet in 

 thickness exposed. The lower portion of the section 

 IS formed of the massive-bedded Fort Mountain 

 quartzitic sandstones. These may be seen at the Giant 

 Stairs and at outcrops on the west side of the upper 

 portion of Paradise Valley, and to the north they rise 

 in the bold cliffs facing Bow Valley. 



