la torre, rock formation of the jurassic period of the triassic desert and arid place of the talampaya cayon la rioja argentina

torre rock formation jurassic period triassic desert arid place talampaya cayon rioja argentina landscape badlands plateau geology mountain terrain soil hill wadi sky valley horizon wilderness cliff dry bed river dinosaurs lived millions years fossils interesting ischigualasto found remains indigenous peoples' settlements petroglyphs puerta del cañón