Cambrian Sawatch (IMAGE) University of California - Santa Barbara Caption Cambrian Sawatch sandstone from the Sauk Transgression caps 1 billion-year-old Pikes Peak granite (pink) marking the Great Unconformity in a roadcut in Manitou Springs, Colorado. Credit Adrian Tasistro-Hart Usage Restrictions For Use with Credit License Original 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.