Sastrugi (IMAGE) University of Colorado at Boulder Caption Persistent winds shape the surface of East Antarctica's snow into small dune forms called 'sastrugi.' Credit Ted Scambos/NSIDC and CU Boulder 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.