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An Introduction to the Study of Rocks and Guide to the Museum Collection (Paperback) Loot Price: R305
Discovery Miles 3 050
An Introduction to the Study of Rocks and Guide to the Museum Collection (Paperback): British Museum Dept of Mineralogy

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An Introduction to the Study of Rocks and Guide to the Museum Collection (Paperback)

British Museum Dept of Mineralogy

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Loot Price R305 Discovery Miles 3 050

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 edition. Excerpt: ... a traveller for whom the transport of large fragments has been impracticable, and who has had himself no opportunity, perhaps not the requisite special knowledge, for the determination of the petrical characters of the respective masses. It must be remembered, however, that from the scientific point of view, the knowledge of a fragment is merely an aid to the knowledge of the whole; and that the latter necessitates a determination, not only of the lithical characters of a fragment, but also of the degree and kind of variation of the lithical characters throughout the whole mass. As already pointed out, the whole of a rock-mass is not accessible to observation, and the lithical characters of all the parts can thus only be inferred from those observed in fragments broken from the mass here and there, in quarries, borings, mines and cliffs. A single mass may consist of more than one kind of rock. It follows from the signification of the term rock that different parts of a single mass are to be regarded as belonging to different kinds of rocks, if the parts are considerable in extent, and their lithical characters, though much the same throughout each part, show important differences in the case of the different parts. It would doubtless have been an advantage if the relationships of such kinds could always have been indicated in their names. In particular cases, indeed, this is possible; for instance, one part having certain lithical characters may be termed basalt, while another part of the same mass, showing very different characters, may be termed basalt-glass. But such a mode of nomenclature would only be generally practicable, if a particular kind of rock, when merely part of a single body, had always the same kind of relationships, ..


Imprint: Rarebooksclub.com
Country of origin: United States
Release date: April 2013
First published: April 2013
Authors: British Museum Dept of Mineralogy
Dimensions: 246 x 189 x 2mm (L x W x T)
Format: Paperback - Trade
Pages: 94
ISBN-13: 978-1-152-34399-3
Categories: Books
LSN: 1-152-34399-8
Barcode: 9781152343993

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