Small lakes (<10 acres) that are typified by extreme relative depth in relation to surface area. This, in addition to watershed soils and its protection from surrounding uplands, results in meromictic lakes never "turning over" as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, these lakes stay stratified, creating unusual chemical and biological layers. There are very few known examples of this lake type in Wisconsin, making them difficult to characterize in terms of vegetation associates. Meromictic lakes do not support fish.
