The drawings were discovered in 2006 in a number of caves in the San Carlos mountain range near the modern-day town of Burgos, about 100 miles south of the U.S. border. The first findings about the red markings that depict people, shapes and designs were revealed this week at a conference in Mexico City.
Mexico’s National Institute of Anthropology and History has been cataloging and studying the drawings for the past two years.
Archeologist Martha Garcia Sanchez said the paintings include human and animal shapes, and relate to astronomy. They’re abstract in nature, she said.
“Their importance is that based on them, we have been able to document the presence of pre-Hispanic groups in Burgos, where before it was believed there was nothing, when in reality it was inhabited by one or several cultures,” she said.