NO. 5 PRE-DEVONIAN PALEOZOIC. FORMATIONS 317 



3/. Gray oolitic limestone 



^k. Similar to 3e 



3/. Gray oolitic limestone 



3;;;. Similar to 3e , 



yi. Gray oolitic limestone 



30. Thin-bedded, bluish-gray limestone, weathering buff., 



Total of 3 



Total Stephen formation 902 



Cathedral Formation 



1. Massive-bedded, dark gray arenaceous limestone 60 18.3 



2. Massive-bedded, arenaceous, siliceous dolomitic lime- 



stone. At 495 feet (150.9 m.) from the base, the 

 beds are thinner and of a dark gray color for 30 to 

 40 feet (9.1 to 12.2 m.). At 825 feet (251.5 m.) the 

 massive layers are banded with light and dark gray 

 colors ' 1,560 475.5 



Owing to small step faults, the thickness of this 

 series of strata is uncertain. The entire thickness on 

 the northeast side was measured and an allowance 

 made for duplication by faulting. 



This great limestone series forms bold, high cliffs 

 on the east face of Mount Stephen and the west side of 

 Cathedral Mountain. 

 Fauna. — Annelid borings and trails at a few horizons. 



3. Massive-bedded, arenaceous, dolomitic limestone 60 18.3 



Total Cathedral formation 1,680 512. i 



LOWER CAMBRIAN 

 Mount Whyte Formation 

 I. Thin-bedded, bluish-black and gray limestone 3 i.o 



Fauna. — (From i and the interbedded limestones at the 

 top of 2) (58k) : 



Acrotreta (Sagitallis) taconica Walcott 



Nisusia (Jamesella) lowi Walcott 



Stcnotheca elongata Walcott var. 



Scenella varians Walcott 



Hyolithes billingsi Walcott 

 2. Gray siliceous shale, with interbedded gray fossiliferous 

 limestone in layers 5 inches (12.7 cm.) to 2 ft. (.6 m) 



thick in the upper portion 108 32.9 



Fawna. — (In the shale of the central portion) (57m) : 



Cystid plates 



Paterina sp. 



Acrotreta sagittalis taconica Walcott 



Nisusia (Jamesella) lowi Walcott 



Hyolithellus sp. 



