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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 36 (1966)No. 3. (September), Pages 831-835

Terminology of Mixed Coarse-Fine Sediments: NOTES

L. J. G. Schermerhorn

ABSTRACT

Existing terminology for megaclastic sediments produced by glacier ice (tillite), by ice-rafting (glaciomarine) or by sliding and gravity flow (tilloid) is confusing and inadequate. Such rocks have in common a mixed, ill-sorted, disperse-megaclastic lithology with a great to extreme range of size grades. The term "aquatillite" is proposed for glaciomarine and glaciolacustrine till-like deposits. The term "mixtite" is proposed as a descriptive group name without regard to origin, including tillite, aquatillite, tilloid and similar rocks produced by other processes. Mixtite takes its place alongside the rudite-arenite-lutite sequence, spreading over the entire grade range.


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