This image shows the dark terrain of Ganymede.
Click on image for full size
Dark Terrain of Ganymede
This image shows an example of the dark terrain of Ganymede. This image shows frost on the ground. The next image shows more of the dark terrain.
The dark terrain is much older than the light terrain of Ganymede. Evidence for the age of the surface is found in it's many craters. Is this respect it very much resembles the surface of Callisto.
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