Meltwater from Greenland ice sheet (IMAGE) Florida State University Caption Pictured is a glacial meltwater river that has drained from the Greenland Ice Sheet. These rivers contain high amounts of suspended glacial flour as the ice sheet acts like a natural bulldozer and gives the rivers a grey milky color. Photo courtesy of Jon Hawkings. Credit Courtesy of Jon Hawkings 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.