Springe direkt zu Inhalt

Spiral Troughs

The darker troughs in between the shining white water ice deposits are part of an impressive system of depressions that spiral outwards from the pole center in a counterclockwise direction and cut through the thick stack of layered deposits that make up the north polar cap. These layered deposits are composed of ice intermixed with dust and record the evolution of the Martian climate over the last Millions of years.