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Palaeolithic rock art belongs to the most ancient artistic representations of human beings. Famous examples are the Altamira and Lascaux paintings. These paintings are conserved under very exceptional conditions. Basically, the pigments are composed of iron oxides or ochre for red and yellow paints, and charcoal and manganese oxides for black...

Palaeolithic rock art belongs to the most ancient artisitc representations of human beings. Conserved under very exceptional conditions, it is today threatened by numerous alteration phenomena, among them the formation and interaction with calium carbonate concretions. The cave "Grande Grotte" of Arcy-sur-Cure (Yonne, France) with prehistoric...