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Why must weathering,erosion, and deposition take place to form a river delta?

User Haterind
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because erosion happens when wind, water, and other collects particles of dirt and other minerals it slowly starts "digging" (forming) a hole. hope this helps you (this has to do with the forming of other rivers)
User Karleen
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because River Delta cannot be formed without weathering, erosion and deposition
User Stephen Roda
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