Topography of Mars

This image shows the topography of two of the hemispheres of Mars. The image was seen on the cover of Science magazine in May of 1999. The most prominent features in this image are: 1) The massive Hellas impact basin (upper-left) in the Southern Hemisphere which is nearly six miles (nine kilometres) deep and 1,300 miles (2,100 kilometres) across. 2) The lower-right image shows the Tharsis province that contains Tharsis Montes (Ascraeus, Pavonis, and Arsia), and the Valles Marineris canyon system and related outflow channels.