V 
86 MUSEUM BULLETIN NO. 2. 
identified as Kitchener, near Kingsgate, and which were subse- 
quently proved to belong to the Aldridge formation. Hence, 
they cannot be Moyie as originally defined by Daly as lying 
conformably on the Kitchener. Lithologically, these so-called 
Moyie rocks are identical with the Aldridge and hence are 
classed as Aldridge. The Moyie in the vicinity of the Yahk 
river rests conformably on the Kitchener formation as defined 
by the writer, and in this region is lithologically similar to the 
low r er part of the Siyeh formation and occupies the same strati- 
graphic position as the Siyeh south of Cranbrook, where it overlies 
the Kitchener and underlies the Purcell Lava. 
The Purcell Lava is absent in the Boundary section but is 
present in the section south of Cranbrook (see map). Daly 
states that the Purcell Lava is absent between the Kitchener 
and Moyie on the International Boundary line, since the flow did 
not extend as far west as the Yahk river. The writer concludes 
that the lava occupied a position above the Moyie and has been 
removed by erosion, and that the Moyie is equivalent to the 
lower part of the Siyeh. Hence, the name Moyie has been 
dropped from the stratigraphic series of East Kootenay. 
The Purcell series as defined by the writer, is as follows: — 
Erosion surface. 
Pre-Cambrian 
Gateway 
2000 -b 
Purcell Lava 
300 
Siyeh 
4000 
Kitchener 
4500 
Creston 
5000 
Aldridge 
Base unexposed. 
8000 + 
Aldridge Formation. The Aldridge formation is the oldest 
known sedimentary member of the Purcell series in the Purcell 
range. It consists of argillaceous quartzites and purer quartzites 
with a subsidiary amount of argillite. The beds vary in thickness 
from a few inches in the argillitic members to 8 feet in the pure 
quartzites, but the average thickness of the strata is 6 inches. 
