Meromictic lake
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A meromictic lake is a lake which has layers of water that do not intermix. In ordinary, holomictic lakes, at least once each year, there is a physical mixing of the surface and the deep waters.
McGinnis Lake is a meromictic lake within the Petroglyphs Provincial Park.
Lac Pavin in France is a meromictic crater lake.
Strandvatnet in Nordland down to the left; only a small isthmus separates the lake from Ofotfjord.
Lac du Bourget is the largest and deepest lake in France
Black Sea
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The Black Sea is a marginal sea located between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bordered by Bulgaria, Georgia
Meromictic lake
…rather than degassing to the atmosphere through organ pipes. While it is mainly lakes that are meromictic, the world's largest meromictic basin is the Black Sea. The deep waters below 50 m (160 ft) do not mix with the upper layers that receive oxygen from the atmosphere. As a result, over 90% of the deeper Black…
The location of the Black Sea, with East Mediterranean to the south
The estuary of the Veleka in the Black Sea. Longshore drift has deposited sediment along the shoreline which has led to the formation of a spit (Sinemorets, Bulgaria).
Black Sea coast of western Georgia, with the skyline of Batumi on the horizon
Swallow's Nest in Crimea