In an estuary,the zone of maximum vertical difference in density of water layers is called the

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The zone of maximum vertical difference in density of water layers in an estuary is called the pycnocline. It is the layer where the water density rapidly changes due to the vertical mixing of freshwater and saltwater. The thermocline refers to the layer in which temperature changes rapidly with depth, and the hypolimnion refers to the lower layer of water in a stratified lake, while the mixing zone refers to the zone where water layers of different temperatures and densities mix.

In an Estuary,the Zone of Maximum Vertical Difference in Density