Pictographs (painted on rock surfaces) and petroglyphs (carved or pecked into the rock surface) depict people, animals and other shapes and forms on rock surfaces. Anthropomorphic (human-like) figures usually have trapezoidal shaped bodies with arms, legs and fingers. The figures are often elaborately decorated with headdresses, ear bobs, necklaces, clothing items and facial expressions. A wide variety of zoomorphic (animal-like) figures include bighorn sheep, deer, dogs, birds, snakes and lizards. Abstract designs, geometric shapes and handprints are also common.
The meaning of rock art is unknown. Designs may have recorded religious or mythological events, migrations, hunting trips, resource locations, travel routes, celestial information and other important knowledge. Many archeologists propose that rock art uses symbolic concepts that provide an observer with important information and that it was not simply artistic expression.