SMITilSOXIAX INIISCELLAXEOL'S COLLECTIONS 



^•0L. 53 



Future Work. — It is desirable that the Lower Cambrian strata 

 of Fairview and Saddle Mountains near Laggan should be studied 

 carefully ; also that the area northwest of Mt. Bosworth and west of 

 Mt. Daly should be examined for Upper Cambrian and Lower Ordo- 

 vician formations and fossils. Exhaustive collections should also 

 be made at many stratigraphic horizons. 



Nomenclature. — Mr. McConnell proposed the name "Castle 

 Mountain Group" for the great series of limestones and shales be- 

 tween the quartzitic sandstones and siliceous shales of the "Bow 

 River Group" below^ and the superjacent Ordovician graptolitic 

 shales on the west and Banff limestone on the east. This includes 

 the upper portion of the Lower Cambrian fauna at the base and the 

 lower portion of the Ordovician fauna at the summit. The term 

 "Castle Mountain" is useful for the series, but I think that local 

 names can be applied with advantage to several of the formations 

 of the "Castle Mountain Group" as originally defined. The follow- 

 ing table gives the relative positions and thicknesses of the new 

 formation names herein proposed and defined for the Canadian 

 Rocky Mountain section : 



S H ERnRooK !■; For M atio x 



Type L()C.\lity. — Western slopes of Mt. Bosworth, overlooking 

 Sherbrooke Lake, Canadian Rocky Mountains, five miles north of 

 Hector, on the Canadian Pacific Railway, British Columbia. 



DerivaTiox. — From Sherbrooke Lake, below the typical locality. 



Ciiar.\cter. — Bluish gray, arenaceous, dolomitic, massive, and 

 thin-bedded to shaly limestones, with a few oolitic layers and cherty 

 inclusions. 



