Streamlined island in outflow channel

Streamlined island in outflow channel

. A raised crater rim acts as a barrier to the catastrophic floods that discharged from the outflow channel Ares Vallis. The water flowed from the southwest (bottom left) with a peak discharge more than 2,000 times that of the Mississippi River. (Courtesy of Michael Carr and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University