Enceladus is known to be volcanically active, spewing out water rather than molten rock. This plume of material emanates from a region on the south pole known as the Tiger Stripes.
Like most objects in the solar system, parts of Enceladus have impact craters, these are no larger that 35 km.
Cracks and Ridges
Enceladus’ surface is marked by long linear structures. These have been shown to have moved from their original locations, similar to tectonics on Earth. Unlike on Earth—where plates move apart symmetrically from a centre—plates on Enceladus move on only one side.
Enceladus’ smooth plains indicate that they have been resurfaced recently by liquid water spewing over the surface; because any ancient surface would be covered with impact craters.