The Action of Colloids in Precipitating Fine-Grained Sediments1

With certain well-known exceptions, ancient sandy and clayey sediments do little more than approach a condition of uniform grain-size. The so-called clays, silts and sands, and their consolidated equivalents, the mudstones, shales, silt-stones and sandstones, receive their appellation in most cases...

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Bibliographic Details
Published in:Geological magazine 1930-08, Vol.67 (8), p.371-381
Main Author: Boswell, P. G. H.
Format: Article
Language:English
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Summary:With certain well-known exceptions, ancient sandy and clayey sediments do little more than approach a condition of uniform grain-size. The so-called clays, silts and sands, and their consolidated equivalents, the mudstones, shales, silt-stones and sandstones, receive their appellation in most cases from the dominant grade present. Actually they consist of a mixture of particles, distributed over a considerable range of grain-size, in which the dominant grade, especially in the case of the finer deposits, often amounts to less than 50 per cent of the whole.
ISSN:0016-7568
1469-5081
DOI:10.1017/S0016756800099520