Garwood Valley (IMAGE) Portland State University Caption Garwood Valley is one of the McMurdo Dry Valleys. This photo shows the stark boundary between a glacier and the valley floor. The pile of ice is from a calving event when the ice broke off the front of the glacier. Credit Andrew Fountain 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.