ABSTRACT
Lakes are geological forms that are formed due to several geological activities related to volcanism, tectonism, glaciation and erosion, and wind erosion. Lakes can also be formed during the evolution of river basins, sea coast changes and meteoritic impact. At the human life scale, they may seem a permanent form in the landscape, but at the geological scale lakes are an ephemeral form of water retention (Hutchinson, 1957; Lossow, 1996). The largest portion of the present lakes of the northern hemisphere is a remnant of the Pleistocene ice age (Choiński, 1995).
