A sea or ocean is found at the mouth of a river.
A delta which is a pile of sediment that builds up.
Some rivers deposit silt at the mouth which form a 'delta'.
The Nile has a good example of a river delta.
Delta!
a large new area
Generally, the mouth of a river is found where it empties into another river, a lake, reservoir or ocean. A large river's mouth can cover a massive area.
dr van dr found the mouth .
Deltas are found at the mouth of rivers
A delta is the mouth of a river.
At a lake. The end of a river is at the sea.
At the point the river empties into a lake or ocean.
Argentina.
Gulf of Mexico
a delta
Sedimentary rock.
Mouth.
Water flows downhill. A watercourse will always be found in a valley, assuming there is precipitaion.