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| Description: Two Surfaces of Ganymede The older, rougher, more heavily cratered parts of Ganymede are the dark terrain. These regions are surrounded by younger, smoother, less cratered bright terrain. The parallel ridges suggest that the bright terrain has been crafted by tectonic processes Picture Stats: Views: 540 Filesize: 392.39kB Height: 620 Width: 1350 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=16350 |