Definition of alluvial
i. Said of a placer formed by the action of running water, as in a stream channel or alluvial fan; also said of the valuable mineral, e.g., gold or diamond, associated with an alluvial placer.
Ref: AGI
ii. Pertaining to or composed of alluvium, or deposited by a stream or running water; e.g., an alluvial clay or an alluvial divide.
Ref: AGI
Ref: AGI
ii. Pertaining to or composed of alluvium, or deposited by a stream or running water; e.g., an alluvial clay or an alluvial divide.
Ref: AGI