PRE-CAMBRIAN OF SOUTHEASTERN B.C. 
89 
Daly in his correlation of the Galton and Purcell series empha- 
sizes the importance of the Purcell Lava in the correlation of 
not only these two series, but for all the equivalent series of the 
Rocky Mountain geosynclinal. 1 In addition, the Siyeh and 
Gateway formations are identical lithologically in the Galton 
and Purcell series. 
General Correlation of Pre-Cambrian ( Beltian ) by Walcott. 
Walcott made the first general correlation table of the Beltian 
of Montana, Idaho, and British Columbia, in a paper entitled 
the “Algonkian Formation of Northwestern Montana, 2 ” and 
for convenience this table is here reproduced. 
General Correlation of Pre-Cambrian ( Beltian ) by Calkins. 
In 1908, Calkins 3 formulated a correlation table of the Beltian 
as a result of a rapid reconnaissance in Idaho and Montana 
and along the International Boundary line across the Purcell 
range. His correlation table based upon Walcott’s of 1906, 
is identical with Walcott’s except as to the position of the 
Purcell series. Both Walcott and Calkins place the whole of 
the Beltian in the Pre-Cambrian. Calkins’ table of formation 
is here appended. 
J Daly, R. A., Geol. Surv. Can., Memoir 38, p. 162. 
nvalcott, C. D., Bull. G. S. A., vol. 17, 1906, p. 17. 
3 Calkins , F. C., U. S. G. S., Bulletin 384, 1908, p. 40. 
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