The term overbank describes the type of alluvial geological deposit or sediment that is deposited on the flood plain of a river. Because it occurs outside the main channel, away from faster flow, the deposit tends to be fine-grained.
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overbank — /oh veuhr bangk /, v.i. Horol. to have the balance staff oscillate so greatly that the fork of the lever fails to engage, rendering the escapement inoperative. [1880 85; OVER + BANK1] * * * … Universalium
overbank — adjective Describing sediments deposited on a floodplain from suspensions in floodwaters … Wiktionary
overbank — /oh veuhr bangk /, v.i. Horol. to have the balance staff oscillate so greatly that the fork of the lever fails to engage, rendering the escapement inoperative. [1880 85; OVER + BANK1] … Useful english dictionary
overbank area — An area covered by flood waters overtopping natural or artificial river banks [16] … Lexicon of Cave and Karst Terminology
overbank deposit — Fine grained sediments (silt and clay) deposited from suspension on a flood plain by floodwaters that cannot be contained within the stream channel. GG … Glossary of landform and geologic terms
Increment Rates of Overbank Deposition in Major Floods, Table — ▪ Table river basin flood average thickness of deposition (metres) Ohio River January February 1937 0.0024 Connecticut River March 1936 0.0347 Connecticut River September 1938 0.0223 Kansas River July 1951 0.0299 Source: Adapted from M.G. Wolman… … Universalium
river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… … Universalium
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