vallée (1) atlas (1) montagne (1) information (1) géomorphologie (1) champ (1) évolution (1) Afrique (1) faille (1) Afrique (1) Propagation (1) Observations (1) Observations (1) Neotectonics (1) Origin (1) Surfaces (1) Science (1) Hinges (1) Growth (1) Geomorphology (1) Geometry (1) Fans (1) Example (1) Evolution (1) Eurasia (1) Convergence (1) Alluvial fans (1) Africa (1) Universe (1) Structure (1)