Slides at the link.
Rock of ages: Up to 70,000 petroglyphs may exist along Mesa Prieta | Albuquerque Journal News By Jackie Jadrnak / Journal North Reporter PUBLISHED: Friday, November 21, 2014 at 12:05 am
Along the entire Mesa Prieta, which stretches to the confluence of the Rio Grande and Rio Chama, and the first Spanish settlement of San Gabriel, some 70,000 petroglyphs are estimated to exist. They include abstract images, except for human handprints and animal footprints, from the Archaic Period (2,000 to 5,000 years ago), a host of human, animal, cosmic and geometric forms from the Puebloan Period (beginning in 1200 A.D.), and even more from the Historic Period, which begins with the Spanish arrival in 1598 around Ohkay Owingeh.
Rock of ages: Up to 70,000 petroglyphs may exist along Mesa Prieta | Albuquerque Journal News