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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 38 (1954)

Issue: 8. (August)

First Page: 1792

Last Page: 1802

Title: Sedimentary Environments Differentiated by Coarse-Fraction Studies

Author(s): F. P. Shepard, D. G. Moore (2)


A simple non-technical system of characterizing sediments is described. In this the coarse fraction of each sample (the part greater than 1/16 mm. in diameter) is sieved and the percentages of the significant constituents in each sieving are estimated from binocular examination of the subdivisions. The findings are compiled into diagrams and averaged for groups of similar sediments. The results appear to provide one of the best means of differentiating modern environments, and give important evidence of distances from shore, and water depths. It is thought that the method could be applied to help differentiate environments of ancient sediments.

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