IGB

Connexion

(Article of periodic en Anglais - 2010)

Document title

Formative conditions and sedimentary structures of sandy 3D antidunes : an application of the gravel step-pool model to fine-grained sand in an experimental flume

Authors(s) and Affiliation(s)

YOKOKAWA M. (1) ; HASEGAWA K. (2 3) ; KANBAYASHI S. (2) ; ENDO N. (4) ;
(1) Inst. of Technology, Osaka, JAPON
(2) Hokkaido Univ., Sapporo, JAPON
(3) Hokkaisuiko Consultant Corporation, Hokkaido, JAPON
(4) Univ., Ishikawa, Kanazawa, JAPON

Abstract

The AA. estimated formative conditions of gravel step-pool morphologies and applied them to the formation of 3D antidunes over a sand bed. Formative conditions are expressed in terms of a relationship between the water discharge per unit width and the bed slope. Flume experiments demonstrated that 3D mound-like antidune configurations and their associated internal sedimentary structures could be preserved. Internal sedimentary structures were characterized by shallow lens-like structures whose bases were erosional. Although gently-dipping concave-upward lamination was dominant, convex-upward lamination was occasionally observed. The dimensions of lenticular lamina-sets can be used to estimate antidune geometry. Thus if 3D antidunes can be interpreted in the stratigraphic record, it is possible to estimate the paleo-hydraulic parameters such as water discharge and bed slope more precisely than previously

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2010, vol. 35, no14 [pp. 1720-1729]

Bibliographic references : 53 ref.

Collation : 7 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2069

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
Refdoc record number (ud4) : 24247326 : Permanent link - XML version
Powered by Pxxo