overbank deposit

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overbank deposit

[¦ō·vər¦baŋk di‚päz·ət]
(geology)
Fine-grained sediment (silt and clay) deposited from suspension on a floodplain by floodwaters from a stream channel.
References in periodicals archive ?
A consequence of the increased downcutting of streams was incision, channel enlargement, and decreased overbank flooding events in low-order streams in the Southern Piedmont.
South from Unirii Square the two overbank hillocks, Mithropoly Hill and Negru-Voda Hill, can still be seen today.
The transition from the Ward Point Member to the North Reef Member is marked by a shift to almost exclusively sandstone-rich, well-drained deposits in overbank areas and a change in fluvial style.
In 2010, overbank flooding at the Tutakoke River site persisted for three hours when it reached an elevation of 2.
Andrew Miall's chapter on alluvial deposits deconstructs river systems into the essential architectural elements of channels, bedforms, and overbank deposits, such as levees and crevasse splays.
The sediments in this area are fluvial deposits (channel and overbank fines) mixed with a significant amount of ashfall tuffs.
The generalised description of 'catchment outlet sediments' (compared to floodplain or overbank sediments) used here accounts for the locally important aeolian influence on transported regolith in some areas of Australia.
Results--The Fort Randall Formation consists of predominantly siltstone and claystone beds representing many distinct overbank deposits.
Bordy and Prevec (2008) interpreted the autochthonous nature of the deposits at KwaYaya, together with various associated sedimentary features, as indicative of deposition in a floodplain setting in the immediate vicinity of a broad, shallow, gently meandering channel in the overbank area of a large fluvial system.
We determined overbank levels at both sites using a time series of Landsat ETM+ satellite images, acquired over the same time period, by relating water level at the corresponding station at the acquisition time of those scenes showing standing water over the study sites.
Efectivos industriales recuperados en el yacimiento de Portomaior C Categorias Overbank Limoarenoso Arenas finas N N % N Elementos de percusion 0 1 6 0 Lascas enteras 2 42 251 25 Fragmentos de lasca 3 23 138 15 Nucleos 1 27 162 13 Chunks 0 6 36 8 Retocados 3 21 126 22 Bifaces y fragmentos 0 37 222 1 Hendedores y fragmentos 0 10 6 0 TOTAL: 260 9 167 84 FIG.