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Definition of wash

i. Loose or eroded surface material (such as gravel, sand, silt) collected, transported, and deposited by running water, such as on the lower slopes of a mountain range; esp. coarse alluvium.

Synonym of: wash stuff

Ref: AGI

ii. An alluvial placer.

Ref: AGI

iii. In coal mining, a washout.

Ref: Nelson

iv. The wet cleaning of coal or ores.

Ref: Nelson

v. Auriferous gravel.

Ref: Fay

vi. To clean cuttings or other fragmental rock materials out of a borehole by the jetting and buoyant action of a copious flow of water or a mud-laden liquid. The similar ejection of core or drill spring equipment from a borehole.

See Also: alluvial cone

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