‘Spiral arms’ and valleys around Mars’ North Pole
‘Spiral arms’ and valleys around Mars’ North Pole
In this perspective view, the terraced structure of Mars’ polar cap can be clearly seen. The ice blanket on the North Pole is over two kilometres thick in places. The processes that led to the several-hundred-metre-deep valleys between the spiral-shaped surfaces of ice are not yet clear. This may be due to the prevailing wind directions in this region.