July 3rd, 1914. 
Canada 
Geological Survey 
Museum Bulletin No. 2. 
GEOLOGICAL SERIES, No. 16 
V. — The Pre-Cambrian ( Beltian ) Rocks of Southeastern British 
Columbia and Their Correlation. 
By S. J. Schofield. 
INTRODUCTION. 
The Beltian rocks of the Galton range and of the Purcell range 
in southeastern British Columbia have been called the Galton 
series and the Purcell series respectively by Daly 1 , in his study 
of a section across these ranges, along the International Boun- 
dary line. These and equivalent series in Idaho have not 
previously been seen in their stratigraphieal relationship to the 
fossiliferous Palaeozoic. Hence the age of these rocks, based 
entirely on correlation by lithologic resemblances, has been a 
matter of controversy; Walcott placing the whole of the Beltian 
m the Pre-Cambrian, and Daly on the other hand postulating 
that only the lower and smaller portion of the Beltian is Pre- 
Cambrian and the remainder or upper part is Cambrian. In 
1913, the writer discovered a section near Elko (see map, 
Fig. 7), British Columbia, where the Pre-Cambrian-Palseozoic 
contact is well exposed and the interpretation of the field facts 
at Elko places the whole of the Beltian in the Pre-Cambrian. 
^aly, R. A., Geol. Sur. Can., Ann. Rept., 1904, p. 91A. 
Report of Chief Astronomer of Can. Ann. Rept., 1905, p. 279. 
Geol. Sur. Can., Memoir No. 38, 1913, pp. 99-139. 
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