a petroglyph is an image created by removing part of the surface of a rock by incising, chipping, carving a form of rock art.

petroglyph created removing surface rock incising chipping carving form art indigenous talampaya cayon rioja argentina geology soil terrain wall wood bedrock formation stonewall cliff boulder trunk tree badlands brick wadi ridge asphalt flooring art indigenous argentina talampaya national park located east centre province argentina dry bed river dinosaurs lived millions years fossils interesting ischigualasto found remains peoples' settlements petroglyphs