Simplified structural map of the Montagne Noire showing the granite-migmatite dome of the Axial Zone, and the sedimentary northern and southern flanks (modified from Gèze, 1949; Arthaud, 1970; Faure et al., 2010). The recumbent folding in the south area is coeval with the sedimentation in the Visean-Serpukhovian basin. The stratigraphy presents a reverse order in most part of these series. The figure was made from the vectorised map 250 000 of Montpellier by the BRGM (Berger et al., 2001).