302 smithsonian miscellaneous collections vol. 75 



Lakes Louise and Agnes Section 

 This section was examined on Mount St. Piran and Mount Whyte 

 in the vicinity of Lake Agnes, and on the Beehive down to Lake 

 Louise, and on the northeast face of Fairview Mountain. 



Feet Meters 



MIDDLE CAMBRIAN 



Cathedral Formation 



I. Massive-bedded, arenaceous limestone forming summit 



of Mount Whyte Estimated 1,500 457-2 



Ptarmigan Formation 

 The Ptarmigan formation had not been recognized when 

 this section was examined. Judging from the section 

 at Ross Lake, 3 miles (4.8 km.) west-northwest of 

 Lake Louise, 500 feet (152.4 m.) or more of the lime- 

 stones included in the lower part of the Cathedral 

 formation on Mount St. Piran and Mount Whyte 

 should be referred to the Ptarmigan formation. 



LOWER CAMBRIAN 

 Mount Whyte Formation 



I. Gray, oolitic limestone in thin beds, with interbedded, 

 banded, bluish- and steel-gray limestone, the steel- 

 gray, dolomitic layers weathering to a buff color 103 31.4 



On Mount Bosworth and Mount Stephen, a con- 

 siderable fauna was collected from this zone, 

 ifl. Shaly and thin-bedded, hard, gray sandstones, with a few 

 thin layers of bluish-gray limestone interbedded, giving 

 a banded appearance to many of the sandstone layers. 66 20.1 

 Fauna. — Annelid trails and trilobite tracks. 

 lb. Greenish siliceous shale, with a few layers of dirty gray 

 arenaceous limestone interbedded at irregular in- 

 tervals 38 II .6 



ic. Greenish siliceous shales in massive layers. The lower 

 two feet (.6 m.) of this formation is a dark gray sili- 

 ceous shale with numerous fossils 64 19.5 



Fauna. — (35m) : 



Lingulc'Ua sp. 

 Iphidclla zvapta Walcott 

 Obolus parvus Walcott 

 Acrothele clitus Walcott 

 Hyolithes billingsi Walcott ? 

 KochicUa agnesensis (Walcott) 

 " Pfychoparia " 3 sp. 

 P olid la primus Walcott 

 icf. Calcareous, thin-bedded, , arenaceous, dark, dirty gray 

 limestone, with numerous small concretions and a few 

 bands of greenish siliceous shale from 6 inches to 



2 feet (15.2 cm. to .6 m.) thick 115 35.1 



Fauna. — Fragments of Olencllus throughout. 



