Abstract
THE first volume of this work was reviewed in NATURE of January 4, 1906, vol. lxxili., op. 234, 235. We noticed in that place the reasons which led to these Cape Colville rock being selected for special study and also the circumstances which made a necessary to call in extraneous aid for descriptive part of the work. Of the volume now before us the first two-thirds, to which alone the title of the book is properly applicable, completes the account of the volcanic rocks of the Cape Colville Peninsula. As before, the petrographical descriptions are by Prof. Sollas, and the notes relative to locality and occurrence by Mr. McKay, who also furnishes a clear geological map of the district. The details of mineralogical composition and micro-structure do not include much that is new, though we may mention the occurrence of a felspar of the anorthoclase type in some of the rhyolites, the frequent association of hornblende (or its pseudoniorphs) with hypersthene in the andesitic rocks, and the presence of olivine in certain basic hypersthene-andesites or hypers-thene-basalts. The interest of this collection of Tertiary andesites, dacites, and rhyolites lies, not so much in any novelty which they present, as in the close resemblance of the whole assemblage from this “petrographical province” to familiar types from better-known areas, such as Hungary and the Great Basin of North America.
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H., A. New Zealand Petrography 1 . Nature 76, 303 (1907). https://doi.org/10.1038/076303a0
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DOI: https://doi.org/10.1038/076303a0