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Abstract:
THE KARST OF BURGONDY (France) - Karst of Burgundy is located between karst of Paris Basin, to which it is connected by its western and northern margins and karst of Jura. The burgundian karst forms an original entity in close relationship with the geological structure of the area, which had defined its distribution and density and the system's amplitudes. Karst of Burgundy develops in calcareous marine formations of Jurassic and Upper Cretaceous (chalk). The karstic landscapes are remarkable by their abundant dry valleys. Caves are characterised by their shallow depths (less than 100m) and the important spreading of the active systems. They can be graded into three types: mesokarstic, holokarstic and cutaneous caves. Deepest and greatest caves (up to 22km) are of holokarstic type. In Burgundy, the majority of caving range from Miocene to Pleistocene; cutaneous caves were only developed during cold phases of Quaternary. Fillings of caves are important, the most interesting fillings are Quaternary bone breccias, rich in paleontological and prehistoric data.