ROCK ART VOCABULARY: 

PICTOGRAPHS or rock paintings, are found on light-colored surfaces in rock shelters, or overhangs. The paint was made from mineral pigments such as hematite and ochre.

 PETROGLYPHS are the most common type of images on stone found in the Southwest. They were made by pecking, incising, scraping, or rubbing away the dark surface of the rock.

 A SYMBOL is something that represents something else by association, resemblance, or convention.