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Comparison of methods of size analysis for sands of the Amazon‐Solimões Rivers, Brazil and Peru
Author(s) -
SEMINAR SEDIMENTATION
Publication year - 1981
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1981.tb01669.x
Subject(s) - fluvial , geology , amazon rainforest , bivariate analysis , sedimentary depositional environment , diagenesis , hydrology (agriculture) , geomorphology , mineralogy , structural basin , geotechnical engineering , statistics , mathematics , ecology , biology
Cumulative frequency curves and bivariate textural plots of sands collected and sieved from the medium‐grained (1.94), well‐sorted (0.46) Amazon‐Solimões Rivers are not environmentally sensitive. Only 13 % of the samples plot as fluvial using cumulative frequency curves, and only one of the nine bivariate plots successfully identified the fluvial environment. Thus, identification of depositional environments of sands by size distribution based only on sieving is not a reliable technique—even when the results of diagenesis are not considered.
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