Petroglyph s were made by carving or pecking through the dark layer of rock varnish on a rock's surface. Pictograph s were made by painting on rock. Similar looking petroglyphs can have different meaning from culture to culture and at different time periods. Archaeologists think that the oldest petroglyphs at the Hedgpeth Hills site were made by the Archaic people.
Designs made by any method on rock surface is called rock art .
A symbol can be a shape, figure, or marking which represents and communicates an idea, concept, or message. The Patayan people, a nomadic hunting and gathering group who lived in the Sonoran Desert approximately 700 years ago, made some of the petroglyphs at the Hedgpeth Hills site. Correct a. ask questions. Incorrect b. touch the rock art. Food for Thought 11.