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 ?
Plots for overbank deposits appear more often to consist of two superimposed plots, as in Figs 5 and 6.
Channels, levees, overbank deposits, and depositional lobes are among the chief architectural elements covered.
Areas to be remediated include the OU4-Conrad Tailings, a 28-acre tailing location with approximately 12 acres of contamination around its perimeter and downstream sediment, overbank deposits and floodplain and a county road right-of-way.
C3 facies is interpreted as overbank deposits produced by the waning flow strength of sandy to muddy sheetfloods through crevasse splays, whereas C4 facies indicates a flood basin origin in a well drained oxygenated environment.
4; Plate 5), and individual beds grade vertically from cross-bedded sandstone into cross-laminated sandstone and overbank deposits at places (Figs.
Interpretation: Strata of the C3 facies are interpreted as overbank deposits produced by the waning flow strength of sandy to muddy sheetfloods through crevasse splays, however, sand bodies of lenticular shape represent levee deposits (Smith et al.
The lack of thick, homogeneous channel sandstone and conglomerate units and a high proportion of overbank deposits suggest deposition in an anastomosing river system (Miall 1992).
of Index Settings Ranges Calculations 7Aa-Glacial Till Over Bedded Sedimentary Rocks 78-150 37 7Ad-Glacial Till Over Sandstone 79-158 33 7Af-Sand&Gravel Interbedded in Till 88-152 23 7Ba-Outwash 107-179 19 7D-Buried Valley 111-179 26 7Eb-Alluvium Without Overbank Deposits 95-160 35 7Ec-Alluvium Over Bedded Sedimentary Rocks 90-138 5
Sedimentology and facies architecture of overbank deposits of the Mississippi River, False River Region, Louisiana.