solifluction

noun
so·li·fluc·tion | \ˈsō-lə-ˌflək-shən \

Definition of solifluction 

: the slow creeping of saturated fragmental material (such as soil) down a slope that usually occurs in regions of perennial frost

First Known Use of solifluction

1906, in the meaning defined above

History and Etymology for solifluction

Latin solum soil + -i- + fluction-, fluctio act of flowing, from fluere to flow — more at fluid

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The first known use of solifluction was in 1906

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