#amazonis planitia

"What process might have created these ridged forms? This observation is located to the southwest of Olympus Mons, in the area that surrounds the giant volcano before start of the lower elevation plain known as Amazonis Planitia. Some of the blueish material in the enhanced color part might represent basaltic (volcanic) sand that is still lingering on the crests of the ridges. We can also see numerous boulders and dark streaks." https://www.uahirise.org/ESP_016359_1910

Amazonis Planitia, Mars. 1969

Amazonis Planitia  , Mars 1969

via reddit

It was late in the northern martian spring when the HiRISE camera onboard the Mars Reconnaissance Orbiter spied this local denizen. Tracking across the flat, dust-covered Amazonis Planitia in 2012, the core of this whirling dust devil is about 140 meters in diameter. Lofting dust into the thin martian atmosphere, its plume reaches about 20 kilometers above the surface. Common to this region of Mars, dust devils occur as the surface is heated by the Sun, generating warm, rising air currents that begin to rotate. Tangential wind speeds of up to 110 kilometers per hour are reported for dust devils in other HiRISE images.