Exploratour - The Surface of Mars
Craters
In spite of the presence of volcanoes and river-like channels, the surface of Mars has many craters and resembles the Moon more than the Earth.
The picture to the left shows an example of the cratered ground of Mars. Almost the entire surface of Mars is cratered. The Tharsis Ridge, where many of the volcanoes of Mars are located, is lightly cratered. The lowlands of Mars are moderately cratered, but the highlands of Mars, in the southern hemisphere, are heavily cratered, as shown in this image, which means that the southern hemisphere is a very old portion of Mars.