Boulders (IMAGE) Woods Hole Oceanographic Institution Caption Huge boulders carried by the Missoula Floods were left stranded across the Pacific Northwest. Credit (Photo courtesy of Tamara Pico, California Institute of Technology) Usage Restrictions with credit 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.