The Chinle Formation at Ghost Ranch, N.M. (IMAGE) Natural History Museum of Los Angeles County Caption The multi-colored slope-forming rocks of the Chinle Formation at Ghost Ranch, N.M. preserve low-latitude ecosystems and environments from 200 million years ago. Credit Courtesy of Randall Irmis Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.