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n. The deposition of alluvium (sediment) by a river

n. The process of accumulating rock-debris along the lower reaches of slopes by rain-wash and along the more slowly flowing stream-courses by loss of overload. Alluvial fans or cones, alluvial plains or flood-plains, and slope-waste are the chief products of alluviation.

n. the phenomenon of sediment or gravel accumulating

"He has participated in the Sagalassos Project since 1991 and focuses on the colluviation/alluviation history, the significance of catastrophic and abrupt climatic events, and the human impact for the last 7,000 years."

geological phenomenon   

lode    load