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This question already has an answer here:

There's always confusion and disagreement when these terms are mentioned. Need to be sure of their exact meanings.

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marked as duplicate by Gimelist, Jan Doggen, bon, arkaia, Fred Feb 16 '18 at 16:40

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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Your question is almost a duplicate of What is the difference between eluvium and alluvium?, but you also ask about colluvial deposits. The accepted answer for that question references this convenient guide from the Australian Museum, which also covers colluvial deposits:

Alluvial: Detrital material which is transported by a river and usually deposited along the river's pathway, either in the riverbed itself or on its floodplain.

Colluvial: Weathered material transported by gravity action such as on scree slopes.

Eluvial: Weathered material still at or near its point of formation.

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