These clouds appear as rows of linear clouds. They are common at the edge of the polar caps. These clouds exhibit a double periodicity. These clouds have a direction without periodicity. 5.Fog or ground hazes.
Fog usually occurs in low areas such as valleys, canyons and craters.
It forms during the coolest times of the day such as dawn and dusk. These are elongated clouds. They appear to have a source of rising material and in many case are composed of dust particles.