Petroglyphs are images created by chipping or pecking away at the surface of a rock. The images may be simple lines or shapes, or they may be complex scenes depicting people, animals, or plants. Petroglyphs are often found in areas where people have lived or travelled, such as near water sources, along trade routes, or on mountain passes.
Pictographs
Pictographs are similar to petroglyphs, but they are created by painting or drawing on the surface of a rock. The paint used for pictographs may be made from natural materials, such as charcoal, blood, or plant juices. Pictographs are often found in caves or rock shelters, where they are protected from the elements.
Geoglyphs
Geoglyphs are large-scale images that are created on the ground by arranging rocks or other materials. Geoglyphs may be simple lines or shapes, or they may be complex designs depicting people, animals, or plants. Geoglyphs are often found in deserts or other arid environments, where the lack of vegetation allows them to be seen from great distances.