308 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



Feet Meters 



" Ptychoparia " pia Walcott 



Kochiella agnesensis Walcott 



4. Banded sandstone and finely arenaceous shale in massive 



beds that break down on weathering into shaly are- 

 naceous layers, usually covered more or less thickly 

 with annelid trails and, more rarel}', tracks of trilo- 

 bites 70 21.3 



5. Greenish, drab and buff-colored, very fine siliceous shale, 



with partings of thin layers of compact sandstone... 85 25.9 



Fauna. — Noted a valve of Micromitra and cranidium of 

 Ptychoparia ? sp. 



6. Calcareous sandstone, with dirty brown and rusty layers 



and shaly sandstone partings 27 8.2 



Fauna. — (63I) : 



Bonnia Heldensis Walcott 

 Olenellus canadensis Walcott 

 Olenellus (many fragments) 



Total of Mount Whyte formation 248 75.5 



St. Piran Formation 

 Massive-bedded, purplish quartzitic sandstones that form 

 cliffs above Ross Lake. (Not measured) 



The Ross Lake section is 5.5 miles (8.8 km.) north- 

 northwest of the Mount Temple section ; it has much 

 more calcareous matter in the form of limestones and 

 calcareous sandstones than the latter. 



At Lake O'Hara, 5.5 miles (8.8 km.) south of the Ross Lake Sec- 

 tion, and 15 miles (24.1 km.) west-northwest of Vermilion Pass, at 

 the level of the lake and a little east of its outlet, a cliff of gray, hard 

 quartzitic sandstone outcrops at the base of Wiwaxy Peaks, in which 

 I found the same lower St. Piran fauna as at Vermilion Pass. 



The Wiwaxy Peaks rise 2,200 feet (670.1 m.) above Lake O'Hara. 

 The upper 200 feet (60.9 m.) is formed of arenaceous limestone of 

 the Mount Whyte formation. The southwest slope of the east Wi- 

 waxy Peak exposes full 2,000 feet (609.6 m.) of the St. Piran 

 formation. 



The Eldon limestone just caps Mount Huber. It is about 600 ieet 

 (182.9 ""■•) thick on Mount Victoria and 800 feet (243.8 m.) on 

 Mount Lefroy. 



Mount Bosworth 



Mount Bosworth lies immediately north of the head of the Kicking 

 Horse River, on the main crest of the ranges and north of the Bow 

 Range. It contains one of the largest and most complete Cambrian 



