red tsingy in madagascar, africa. stone formation of red laterite formed by erosion of the irodo river in the region of diana in

madagascar red africa north stone river tsingy formation erosion land geology eroded sand topography scenic landscape rock object rain natural national rouge outdoors old landmark island heritage cretaceous cobblestone unesco wilderness canyon area limestone sandstone tana travel tsingi sightseeing nature antsiranana orange mesozoic madagaskar fluvial era cingy cingi artemis pebble