Colombia's Eastern Cordillera (IMAGE) Smithsonian Tropical Research Institute Caption Sediments that gather at the base of mountains provide important clues about how and when the mountains were formed. Credit Carlos Jaramillo, STRI Usage Restrictions Credit: STRI 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.