Wind Streaks (IMAGE) Brown University Caption The streaks are often associated with smaller craters that were already in place when the larger crater was formed. The raised ridges of the preexisting craters disturb the flow of the vapor plume, which causes vortices to form and scour the ground. Credit NASA/JPL-Caltech/Arizona State University 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.