90 
MUSEUM BULLETIN NO. 2. 
General Correlation of Pre-Cambrian ( Beltian ) by Daly. 
Daly, in 1913, from his field work along the International 
Boundary line, puts forward the accompanying correlation table. 1 
Correlation of Pro-Cambrian ( Beltian ) by Schofield. 
( 1 ) Correlation of Purcell Series with Coeur d’Alene Series. 
The correlation of the individual members of the Coeur d’Alene 
series with the Purcell series by Walcott and Calkins was based 
upon Daly’s subdivision of the Purcell series which was found to 
be erroneous. The writer, in 1911, carefully examined the 
formations in the Coeur d’Alene district and was able to identify 
in that region with some degree of certainty, the formations 
exposed in East Kootenay. The following table shows the 
writer’s conception of this correlation. 
Coeur d’Alene Series. Purcell Series. 
Striped Peak 
1000 + 
. . . .Siyeh (lower part) 
2000 + 
Wallace 
4000 
.... Kitchener 
4500 
St. Regis 
1000 1 
& 
Revett 
1200 
* . . Creston 
5000 
Burke 
2000 , 
Prichard 
8000 + 
.... Aldridge 
8000 + 
* (2) General Correlation of Pre-Cambrian by Schofield . The 
following general correlation table is based on Walcott’s original 
table presented on the foregoing page of this article, with 
additions by the writer on the results of field work in the Pre- 
Cambrian of Idaho and British Columbia. It will be noticed 
that the controversy centres around the age of the Siyeh lime- 
stone which is one of the most important horizon markers in the 
Beltian. 
The evidence for the determination of the Siyeh limestone as 
Middle Cambrian by Daly on stratigraphical and lithologic 
bases, is given in part by these words. 
^aly, R. A., Geol. Surv., Can., Memoir 38, p. 178. 
