Page:Canadian Alpine Journal I, 2.djvu/79

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235
Mt. Stephen Rocks and Fossils

near the triangular patch of snow is the best place to camp when working at the "fossil bed." It is 1600 feet above Field.

This picture gives a beautiful view of the various channels of the Kicking Horse River, the mass of Mt. Burgess, and the Van Home range to the left of Mt. Burgess.

No. 3. View looking west from the "fossil bed" toward Mt. Dennis. The character of the "fossil bed" is beautifully shown, also the structural character of Mt. Dennis.

No. 4. View of the amphitheatre on the southwest side of the upper portion of Mt. Stephen. The "alcove" erosion of the cliff on the south side of the amphitheatre is beautifully shown. Middle Cambrian fossils occur in the rock shown in the lower right hand corner of the view.


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GEOLOGICAL SECTION OF MOUNT STEPHEN.

Studied July, 1907.

The section is from the summit of the mountain down the northeast and north slopes to the Canadian Pacific Railroad track below the tunnel and through the basal quartzitic sandstones.

The massive, siliceous, dolomitic limestone (Eldon formation) forming the upper portion of the mountain was not measured above the bluish-gray limestone and shaly band. Its thickness is estimated at 2,700+ feet. It is 2728 feet thick on Mount Bosworth. An attempt was made to measure the Cathedral formation, but owing to step-faulting, the result is not satisfactory. This formation has a thickness of 1595 feet on Mount Bos-