GEOLOGY

Detailed explanation-1: -Most deep lakes follow a seasonal cycle of stratification and complete mixing, but meromixis is a condition in which a lake does not mix completely.

Detailed explanation-2: -A meromictic lake may form because the basin is unusually deep and steep-sided compared to the lake’s surface area, or because the lower layer of the lake is highly saline and denser than the upper layers of water. Stratification in meromictic lakes can be either endogenic or ectogenic.

Detailed explanation-3: -A meromictic lake has layers of water that do not intermix. In ordinary holomictic lakes there is physical mixing of deeper and surface waters at least once every year. As per one quote the meromictic lakes are very rare and there are only 36 known meromictic lakes in the world.

Detailed explanation-4: -Meromictic lakes are few in the world compared to holomictic lakes with some examples being Lake Tanganyika (the deepest lake in Africa), Lake Kivu, Kaptai Lake, Jellyfish Lake, Lake Cadagno, the Great Salt Lake, and the Lower Mystic Lake.

Detailed explanation-5: -They are rare, especially in temperate climates like that of New York state. There are only 36 known meromictic lakes in the world. New York state is home to six of them, and three of the six are located just outside of Syracuse in the towns of Fayetteville and DeWitt: Green Lake, Round Lake and Glacier Lake.