estuary
I think that you mean where a river meets the ocean? Since the ocean and the sea are the same thing. It is called an estuary.
It is the river bank. Or coast, if it is emptying into the ocean, like the Mississippi River.
silt
The Amazon river meets the Pacific ocean. The place where the river meets the ocean is the tributary. The Amazon tributary is gigantic.Let's follow the left tributary to it's source.I'm not sure of the name of the Amazon River's largest tributary.
A river's place of origin is where the river begins; this is called the source. The opposite of the river's source is the mouth, or where the river ends. The mouth of the river is where the river meets the ocean.
A Delta
it is called the basin or the"Mouth" of the river
the mouth
the Atlantic ocean
The Atlantic Ocean.
Atlantic Ocean
Red river