The water that gushes out from the sources of the Cuisance in the Jura has previously circulated in the underground water table of the limestone rock. It is therefore very loaded with dissolved carbon dioxide and calcium carbonate which precipitates - i.e forms a molecular aggregate - under the combined actions of different physicochemical factors, algae and the agitation of the environment resulting in the creation of spectacular formations such as the Tufs waterfall of Planches-près-Arbois.