Life on Mars? The Hebes Chasma at right, the Echus Chasma left with the Tharsis Tholus behind, north of the Valles Marineris. View SE to NW. Note the 'wall' between the two depressions. There's no outlet for water (and the released rocks and earth) that could have shaped the Chasma. So: how was this Hebes Chasma formed? Thin clouds (and their shadows) high in the atmosphere. Take 1, june 4 2001 Resolution 1024x768 MOLA datafile ieg0031t |