The sediments are called silt or alluvium. The land formed from these sedimants where the river meets the ocean is a delta.
A river of water in the ocean might be a way to describe an ocean current, such as the Gulf Stream.
It is called an ocean current or a river current. :)
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.
silt
Estuaries
The term for the place where a tide meets a river current is called the "tidal bore." This phenomenon occurs when the rising tide enters a river channel, causing the water to flow upstream against the current.
its called a coast tidal line.
A current. Like the Gulf Stream is a current - the California Current is the flow of water from the Gulf of Alaska down to Mexico and is a "river in the ocean."
Sediments drop out when a river meets an ocean because the velocity of the river decreases as it enters the calmer waters of the ocean, causing sediment to settle out of the water. This process is known as sedimentation and is influenced by factors such as water flow, sediment size, and wave action.
current people
When one river meets another, it is called a tributary.