Black came from pulverized manganese oxide and was used for pictographs and face painting only. White clay was a source of white paint used in body painting and pictographs. Yellow came from naturally occurring yellow ochre. Rock painting was highly developed. It was abstract and geometric.
Rock paintings are pictographs, rock carving and incising are petroglyphs.
There are extensive rock paintings at Piedras Pintadas in Rancho Bernardo, and at La Rumerosa near Tecate, Mexico. They are among the finest and most expressive in the West. The sun shamans had special holy locations, designated 'sunwatcher' mountain, used to mark the timing and observance of solstice and equinox ceremonies. Only band leaders and shamans, and equivalent personnel from other tribes, nations, or special guests could enter these locations or go to the tops of such mountains. Usually the tribe gathered at the bottom of the mountain for special ceremonies of special healing rites.