EXPRESSIONS FOR THE FORMATION OF LOAD CASTS IN SOFT-SEDIMENT

Authors
Citation
Js. Selker, EXPRESSIONS FOR THE FORMATION OF LOAD CASTS IN SOFT-SEDIMENT, Journal of sedimentary petrology, 63(6), 1993, pp. 1149-1151
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Geology
Journal title
ISSN journal
0022-4472
Volume
63
Issue
6
Year of publication
1993
Pages
1149 - 1151
Database
ISI
SICI code
0022-4472(1993)63:6<1149:EFTFOL>2.0.ZU;2-2
Abstract
A simple equation predicting the dimensions of sediment load casts is obtained from the fluid-mechanics literature. The equation relates the density and viscosity of the upper and lower sedimentary materials to the size of the expected load cast. These results are extended to pre dicting load cast size as a function of median grain size and sediment concentration, which are of more utility in geological studies. The r esults are based on the assumption of Newtonian fluid behavior, and pr edict load cast dimensions of less than 10 cm for a wide range of sedi ment conditions. It is hypothesized that although the results are of t he correct order of magnitude, non-Newtonian theologic properties are important to load cast formation given the common occurrence of load c asts larger than those predicted.