103 
the possibility of a Jurassic age for some of the Kootenay. His hypothesis 
assumes continuous deposition, no hiatus, and unlike time ranges of the 
Fernie in different localities. 
It is possible that some part of the lower member of the Bull Head 
Mountain formation in the canyon on west Peace river is approximately, 
or in part, the equivalent of the Kootenay of the Blairmore region; for 
the upper or Gething member contains a flora approximately equivalent 
to the lower Blairmore flora. 
In 1916 the older and more primitive lower Blairmore flora, with very 
rare dicotyledonous angiosperms, was tentatively dated as “uppermost 
Comanchean”, using Coman chean in the sense of Lower Cretaceous and 
the younger or upper dicotyledonous flora was dated as probably Dakota 1 . 
Later the plant collections were sent to Professor Berry with the request 
that the difference in composition of the Lower Blairmore and Kootenay 
floras be determined, that all the floras be correlated, and that the possi- 
bility of the upper Blairmore flora being of Dakota age be considered. 
Professor Berry after studying the collections points out the similarity of 
the Kootenay and lower Blairmore floras and also some differences, com- 
pares the upper Blairmore flora with that of the Cheyenne sandstone of 
Kansas, dating it Cenomanian and basal Upper Cretaceous and dating 
the lower Blairmore flora Aptian and Albian or parts of both. 2 The upper 
Blairmore flora is considered by him to be of pre-Dakota age in the sense 
of Dakota as restricted by him®. It has been pointed out, however, that 
the Cheyenne may be of Albian age 4 providing the zone of P. inflata is 
Albian. This being so, not only would all the Blairmore formation be pre- 
Dakota, but all would also be of Lower Cretaceous age, providing that 
Cenomanian be taken as the base of the Upper Cretaceous. 
Little can now be said of the distribution of the two Blairmore floras 
in other parts of western Alberta and eastern British Columbia, The 
lower flora, however, may be close in age to the flora of the Gething member 
of the Bull Head Mountain formation in Peace River canyon, British 
Columbia. In 1917 this flora was tentatively correlated with the lower 
Blairmore flora on the basis of the plant association of cyeadophytes, ferns, 
and a single specimen of a dicotyledonous angiosperm. 6 The angiosperm, 
however, was lost in transit to the office. Later Berry studied this flora 
and gave it a Barremian and Kootenay date, but after studying the floras 
from Blairmore revised this diagnosis and dated it as almost or at least 
partly of the age of the lower Blairmore flora. 6 The upper Blairmore flora 
has not yet been definitely located elsewhere in Canada, although the Mill 
Creek flora from the middle branch of Oldman river may be of this flora, 
but it has not been studied since Dawson’s time. The Intermediate flora 
of Dawson may also be a Blairmore flora and should be restudied. 
As already pointed out the Blairmore fauna has a long range within 
the formation and is for the most part coeval with the lower Blairmore 
flora, the known range of the former being from 230 to 1,540 feet and the 
1 McLeans, F. H.: Geol. Surv., Canada, Sum. Rept. 1915, p, 112 (1916). 
3 Berry, Edward W,: Trans. Roy. Soc., Canada, 3rd ser., vol. 20, sec. IV, pp. 202-204 (1926); Kootenay and 
Lower Blairmore floras, this vol.; upper Blairmore flora, this vol, 
3 Berry, Edward W.: Am. Jour. Sci., vol, 50, pp. 387-390 (1920). 
4 Stanton, T. W.: Am. Jour. Sci,, vol. 16, p. 408 (1928). 
* McLearn, F. H.: Geol. Surv., Canada, Sum. Kept. 1917, pt. C, p. 17 (1918). 
6 Berry, Edward W.: Trans. Roy. Soc., Canada, 3rd ser., vol. 20, pp. 202-3 (1926). 
