EARLY CAMBRIAN STRATIGRAPHY. 
109 
districts, 1 however, the Mount Whyte is correlated with the 
Lower Cambrian Hota formation, presumably upon the basis of 
the presence in each of the genus Olenellus and the absence 
from the overlying beds in each case of anything referable to 
that genus. This principle, to which Mr. Walcott has long 
subscribed, altogether ignores the stratigraphic value of so new 
and striking an assemblage as the Albertella fauna, and places 
that biota in the Lower Cambrian on Mount Bosworth and in 
the Middle Cambrian on Mount Robson. The Titkana and 
Eldon are correlated upon page 343 of the same paper whereas 
beds at least 1,000 feet above the base of the former unit are 
stated on page 337 to have yielded a fauna directly comparable 
with that of the Stephen formation. The Mount Robson 
Cambrian section, which is 9,200 feet thick, has yielded only 
seven fossil horizons and three of these are closely related zones 
with Olenellus , consequently the following table can be presumed 
to give only the major features of the correlation between the 
Mount Robson and Mount Bosworth sections: — 
Correlation of Cambrian Formations in British Columbia. 
Mount Robson district. Mount Bosworth district. 
Upper 
Cambrian. . . . Lynx 
2,100 
Ottertail . . . 
Chancellor. 
Sherbrooke 
Paget 
Bosworth . . 
1,725 + 
2,500+ 
1,375 
360+ 
1,855+ 
Titkana .... 
2,200 
Middle 
Mumm 
600 
Cambrian < 
Hitka 
1,700 
Tatay 
800 
Chetang .... 
900 
Lower 
Hota 
800 
Cambrian. . . . < 
Mahto 
1,800 
Tah 
800 
Eldon. . . . 
Stephen . . 
Cathedral 
f Mount Whyte . , . 
St. Piran 
Lake Louise 
^McNaughton 500+ Fort Mountain. . 
2,728 
640+ 
1,595+ 
390 
2,705 
105 
2,700 
1 Smithsonian Misc. Coll., vol. 57 No. 12, 1913, p. 343. 
