Introduction (§ 1)

McEvoy2 was the first geologist to describe the succession near Yellow-head Pass, between British Columbia and Alberta, on the line of the Grand Trunk Pacific Railway. He applied McConnell’s3 terms, Bow River and Castle Mountain, to the clastic lower and the calcareous upper portions respectively, mapping Mount Robson itself as Castle Mountain.

Walcott has published two papers on the geology.4 These papers are extensively referred to in the following pages, but this is the proper place to record my regret at having to present an interpretation of the stratigraphy so widely different from that of Mr. Walcott. It is unfortunate that conclusions, so diverse from those that have preceded them should be based on field work so incidental as my own, and I should hesitate to present the results of a few days’ reconnaissance in an area where another has done several seasons’ work if my evidence . . .

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