The layered terrains of the Martian polar regions are among the most exotic planetary landscapes in our Solar System. The layers exposed in the south polar residual cap, provide a vivid detail of the climate history of Mars over the last 100 million years or so.
The materials that comprise the south polar layers may include frozen carbon dioxide, water ice, and fine dust. In the lower left of the image a complex erosional pattern has developed on the south polar cap, perhaps by a combination of sublimation, wind erosion, and ground-collapse.
Because the south polar terrains are so strange and new to human eyes, no one (yet) has entirely adequate explanations as to what is being seen.
These images were acquired by the Mars Orbiter Camera aboard the Mars Global Surveyor spacecraft during the southern spring season in October 1999.
