DETAILED STRATIGEAPHIC DISTRIBUTION. 



131 



Detailed stratigraphic distribution of Cambrian and Ordovician Brachiopoda — Continued. 

 British Columbia : Uount Bosworth — Continued. 



Mount Bosworth section. 

 [Walcott, IQOSf, pp. 204-217.1 



Other localities and species in 

 British Columbia and Alberta 

 .shown in their approximate 

 stratigraphic position. 



LOWER c-tMBRiAN -Continued. 



Bow River group — Continued. 



Fort Mountain sandstone: a 



1. Thin and thick layers of gray, quartzitic, brownish weathering, Feet. 



compact sandstones (estimated) 000+ 



Total Lower Cambrian 3, 800+ 



Total Cambrian 12, 353+ 



a In 190S[ Walcott, 1908a, p. 5] these quartzitic sandstones were described as the "Fairview formation." As that name, however, is preoccupied 

 in American nomenclature, and as the lower part of the formation has since been found exposed at several places on the east side of the Bow River 

 Valley, it has been decided to apply the name Fort IMountain sandstone to the whole, from the typical exposures on Fort Mountain. The forma- 

 tion is here composed of 2,700 feet of sandstones similar to the 600 feet of sediments to which the name " Fairview" was applied, and a basal bed of 

 massive conglomerate nearly 200 feet thick. At this locality the Fort Mountain formation is unconformably underlain by pre-Cambrian rocks. 



Calif oriua. 

 See Nevada, Barrel Spring section, wliere the California localities are shown in their approximate stratigraphic 



position. 



Cape Breton and ITew Brunswick. 



For the strata above the Etcheminian a generalized section only has been used. The Cape Breton localities have, 

 however, been kept distinct from those in the vicinity of St. John. The Acadian is not represented in the brachiopod 

 collections from Cape Breton. The Etcheminian is so well developed and so fossiliferous on Dugald Brook that 

 Matthew's section is copied and the fossils from the brook are kept separate from those occurring elsewhere. 



