Ancient water flow in Marsí Ares Vallis

Ancient water flow in Marsí Ares Vallis

Fig. 2.42 . As shown in this image, obtained from an instrument aboard the 2001 Mars Odyssey orbiter, large quantities of water were diverted around preexisting craters in Ares Vallis. As the water made its way downstream, the interference with the flow was reduced, and the water flow reformed at the narrow ends of the islands. The orientation of the islands therefore indicates the direction of flow, with the narrow end of the island pointing downstream. In this case, the flow is from the lower right to upper left. Ares Vallis is an outflow channel opening onto the Chryse Planitia, landing site of Mars Pathfinder (see Figures 2.14 and 2.15). Ares is the Greek god of war, and possibly connected with the Roman god Mars. (Courtesy of NASA/JPL/ASU.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University