A delta is the mouth of a river.
a delta
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Delta
A delta
delta
A sea or ocean is found at the mouth of a river.
The Nile River Delta.
only if is around the delta of the river
Deltas are formed at the old stage of the river that is at the mouth of the river. Deposition is the main activity. The largest delta in the world is Ganga-Brahmaputra Delta.
delta
A river delta would be a heterogeneous mixture of compounds and elements
It would probably be the River Nile Delta.