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Geological Work in Canada

Nature volume 96, pages 660662 (10 February 1916) | Download Citation



THE Museum Bulletins of the Geological Survey of Canada include a number of papers on natural history and anthropology, and afford a rapid means for the publication of scientific work. No. 4 (“The Crowsnest Volcanics,” by J. D. MacKenzie, 1914) describes igneous rocks from south-west Alberta, and establishes, under C. W. Knight's name of “blair-morite,” a trachytic type consisting of analcite crystals up to an inch in diameter, embedded in a green and sometimes aphanitic matrix. Orthoclase (sanidine), pyroxene, and melanite also occur. The analcite arose at an early stage in the consolidation of the rock, and may amount to 75 per cent, by volume. No. 15 is also a petrographic paper, on “The Gay Gulch and Skookum Meteorites,” by R. A. A. Johnston, describing and illustrating two specimens, probably from the same fall, which contain about 80 per cent, of iron and an unusual proportion of nickel, from 15 to 18 per cent.

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