alluviationn.
/əl(j)uːvɪˈeɪʃn/, U.S. /əˌluviˈeɪʃ(ə)n/ The deposition of alluvium; an instance of this.
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the world > the earth > structure of the earth > formation of features > sedimentation > [noun] > alluviation
atterration1686
alluviation1791
1791 E. Darwin Bot. Garden: Pt. I Addit. Notes 121 Some calcareous depositions owing to alluviation.
1811 W. Marshall Rev. Rep. to Board Agric. from Eastern Dept. Eng. 270 Admitting that these lands may be improved, by drainage and alluviation.
1847 C. Lanman Summer in Wilderness xxii. 132 They have been striped with various colors by mineral alluviations.
1877 G. K. Gilbert Rep. Geol. Henry Mts. (U.S. Geogr. & Geol. Surv. Rocky Mt. Region) 139 The changes by planation and alluviation.
1937 S. W. Wooldridge & R. S. Morgan Physical Basis Geogr. xii. 173 Flood alluviation, like aggradation by gravel, is closely linked with the development of meanders.
1969 D. J. Mulvaney Prehist. Austral. 59 Many sand deserts are a legacy of this great Tertiary alluviation.
2008 S. Rippon Beyond Medieval Village vii. 262 In the Thames Valley generally there was an increase in alluviation from around the eighth and ninth centuries.
This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021).
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