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Statistical Methods in Sedimentary Petrology. Part II. Grain-Size Measurements and their Graphical Study

Published online by Cambridge University Press:  01 May 2009

Frank Smithson
Frank Smithson
Affiliation:
Birkbeck College, University of London.
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Extract

It is proposed in the present paper to discuss certain micrometric methods applicable to the minerals of sedimentary rocks and to suggest how their graphical study may be used for the elucidation of certain problems in sedimentary petrology. The examples used are taken chiefly from the Triassic and Jurassic rocks of Yorkshire as described in Part I.1

Type
Original Articles
Information
Geological Magazine , Volume 76 , Issue 8 , August 1939 , pp. 348 - 360
Copyright
Copyright © Cambridge University Press 1939

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References

page 348 note 1 Geol. Mag., LXXVI, 1939, 297.Google Scholar

page 350 note 1 It is a common practice in plotting size analyses obtained by elutriating, sieving, and weighing to reverse the horizontal scale so that sizes increase from right to left. This reversal has not been adopted here.

page 357 note 1 See also Text-fig. 23.

page 357 note 2 Geol. Mag., LXXVI, 1939, 297.Google Scholar

page 358 note 1 3√lb2 might be regarded as a more reliable value for zircon, but in practice it has been found best to adopt a uniform method for all minerals.