Figure 7-33 Enceladus (a) Cassini view of the two distinct landscapes on Enceladus, one heavily cratered, the other nearly crater-free. The blue “tiger stripes” are believed to be due to upwelling of liquid that froze at the surface. (b) The crater-free region near the south pole. The ridges are thought to be created by tectonic flows. Inset shows ice boulders. (c) Icy particles ejected from Enceladus may be continually coming out of the moon.