4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



Derivation. — From Mt. Stephen, the type locahty. 



Character.— Limestones and shales, calcareous and siliceous. 



Thickness. — In Mt. Bosworth section, 640 feet; on Alt. Stephen. 

 562 feet, with 150 feet of local development of Ogygopsis shales at 

 the summit. 



Organic Remains. — Middle Cambrian: Ogygopsis fauna of Mt. 

 Stephen and fauna below in the thin-bedded, dark bluish gray lime- 

 stone. 



Cathedral Formation 



Type Locality. — Cathedral Mountain and Cathedral Crags, east 

 of Mt. Stephen and southeast of Mt. Bosworth. 



Derivation. — From Cathedral Mountain, the type locality. 



Character. — Massive arenaceous and dolomitic limestone. 

 . Thickness. — In Mt. Bosworth section, 1,595 feet; in Castle 

 Mountain, 987 feet; in Cathedral Mountain and Mt. Stephen, 1,600- 

 1,800 feet. 



Organic Remains. — Middle Cambrian. 



Mt. Whyte Formation 



Type Locality. — Mt. Whyte, above Lake Agnes, and eastern 

 slope of Popes Peak, southwest of Mt. St. Piran. 



Derivation. — From Mt. Whyte, the type locality. 



Character. — Alternating bands of limestone and siliceous and 

 calcareous shale. 



Thickness. — North slope of Mt. Whyte, 386 feet ; south slope of 

 Mt. Bosworth, 390 feet; Mt. Stephen, above railroad tunnel, 315 

 feet; southeast slope of Castle Mountain, 248 feet. 



Organic Remains. — Lower Cambrian. 



BOW RIVER GROUP 



This name was proposed by Dr. George M. Dawson for the great 

 series of arenaceous and siliceous strata beneath the Castle Moun- 

 tain group of McConnell. This series will ultimately be divided 

 into several formations. At present the upper portion may be sepa- 

 rated into three formations in the vicinity of Lake Louise. 



St. Piran Formation 



Type Locality. — Southeast slope of Mt. St. Piran. The basins of 

 Lakes Agnes and Mirror are both excavated in this formation. 



