How are pluvial lakes formed?

Pluvial lakes are formed in response to increased precipitation and reduced evaporation, often during periods of climatic change, such as the last Ice Age. When a region experiences a significant rise in rainfall, water accumulates in low-lying areas, creating lakes that can be quite large. These lakes typically have no outlet, leading to higher salinity levels over time as evaporation continues. As climate conditions shift back to drier periods, these lakes may shrink or completely dry up, leaving behind sedimentary deposits.