When estuarine water forms layers of different density that do not mix, it is called what?

Stratification

Explanation:

Estuarine water is the water found in an Estuary. It is also referred to as brackish water. It is formed when fresh water meets with salty water from the ocean.

Estuarine water is a body of water that is usually found in a Lagoon. Estuarine water contains layers of water with different density which do not mix together due to the effect of their salinity level as well as their temperature on the densities of the water and this process is known as Stratification.

A Bay Where The River Empties Into The Sea