NO. 5 PRE-DEVONIAN PALEOZOIC FORMATIONS 303 



Feet Meters 



le. Brownish and gray sandstones, with thin partings of 



greenish siHceous shale 72 21.9 



Fauna. — (sSv) : 



Scenclla varians Walcott 

 Orthotheca sp. 

 OlencUus sp. 

 Bonnia sp. 



Total of Mount Whyte formation 458 139.6 



St. Piran Formation 



ifl. Massive-bedded, quartzitic sandstone 710 216.4 



lb. Greenish siliceous shale, with an occasional interbedded 



layer of quartzitic sandstone 143 43.6 



ir. Thick-bedded, gray quartzitic sandstone 33 10. i 



id. Greenish and gray siliceous shale and thin-bedded sand- 

 stone layers 24 7.3 



le. Massive-bedded, quartzitic sandstone, usually light gray 

 and containing a few partings of gray arenaceous 

 shale 875 266.7 



if. Thin-bedded, quartzitic sandstones, with some shaly 

 partings and a band of shale about 10 feet (3 m.) 

 thick towards the base 295 89.9 



Fauna. — {6od) : 



Hyolithcs sp. 



Orthathcca sp. 



Mesonacis gilbcrti (Meek) 



Olenellus canadensis Walcott 



It;. Massive-bedded, light gray quartzitic sandstone 44 13.4 



Scolithus borings. 



ih. Massive-bedded, purple quartzitic sandstone 85 25.9 



It. Quartzitic sandstone in layers i inch to 6 inches (2.5 to 



15 cm.) thick, with some shaly, siliceous partings.... 423 128.9 



Total St. Piran formation 2,632 802.2 



Lake Louise Shale 



Gray, hard siliceous shale 105 32.0 



Fauna. — ■ 



Micrometra (Iphidclla) Ionise Walcott 



Cruciana 



Annelid trails 



Fort Mountain Formation 

 Thin and thick layers of gray quartzitic sandstone 940 -)- 286.5 + 



Fairview Mountain Section 

 On the north face of Fairview Mountain above Lake Louise, the 

 Lake Louise shale forms a slight break in the cliffs, affording a 

 foothold for small coniferous trees and a covering of mosses and 



