

WE ee Pa Wap ee 
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B. N. A. BOUNDARY COMMISSION. rie 
limestones full of Encrinites and corals, are mentioned ;* and near Old I 
Bow Fort, cream-coloured limestone, with cherty nodules and obscure 
Encrinite stems, blue crystalline limestone and compact earthy limestone, 
with Cyathophyllum and Favosites were found associated. + 7m 
150. In Roche Miette Mountain, near Jasper House, Dr. Heetor 
obtained the following interesting section :—{ 
Hard, compact blue limestone and shale, with nodules of 
ATOD. PYTLUOB sin’. sive okies co GREE be mists Sin ete eine to .... 2,000 feet. 
Fissile shales, almost black.............. Sint> oe kites pe OOe ee 
Hard grey sandstone an bs's gh obo Rote Pee Meets oleate hin teres a) tt RLU de ee 
Shales, toward the upper part with green and red : ; 
blotches, the lower part rust-coloured............ 500 
Cherty limestone and coarse sandstone, obscured by 
timber 
This shows a moderately close resemblance with the members of 
the Boundary section from D. to B., inclusive. 
151. At the north end of Pipe-stone Pass, a dark-blue limestone, 
containing Atrypa reticularis, and therefore characterized as Devonian, 
occurs. § 
152. Near the Upper Columbia Lake, on the west side of the main 
range of the mountains, Carboniferous limestone is found lying uncon- 
formably on slaty rocks, a very interesting fact when taken in conjunc- 
tion with the supposed unconformity of Series D. and C., on the Line. 
Dr. Hector describes the “‘ cherty Carboniferous limestone” as “resting 
on slate, both dipping to the north-east, but the latter at a very high 
angle,” || and in another place recurs to the observation as proving the 
unconformity of the limestone on the underlying series. 4] 
153. In summing up his observations, Dr. Hector considers the 
eastern range to be mainly composed of thick-bedded limestones. He 
writes :—“ These limestones are of dark and light-blue colour, crystal- 
line, compact or cherty, with fossils that are either of Carboniferous or 
Devonian age, the principal of which are Spirifer, Orthis, Chonetes, 
Conularia, Lonsdalia, Cyathophyllum, Lithostrotion, &e. Along with them 
are softer beds of grity, sandy shale, generally of a dull red or purple 
colour.”** “In the second range we have the same limestones and shales 
repeated as in the first, but at the base I observed traces of a magnesian 
limestone of a buff colour, containing Atrypa reticularis, a true Devonian 
fossil.” ++ “On the Kicking-horse River, in the third range, we have the 


* Exploration of British North America, p. 113. 
t Ibid., p. 146. t Ibid., p. 127. § Ibid., p. 150. || Tbid., p. 154. 
*| Journ. Geol, Soc., vol. ‘xvii., p. 443. ** Exploration of ee. North America, p. 239, 
tt Journ. Geol, Soc,, vol. vii., p 





