Barchan sand dunes on Mars
This image from HiRISE, on the Mars Reconnaissance Orbiter, shows two flat top mesas in southern Mars when the season was changing from Spring to Summer. Images Credit: HiRISE, MRO, LPL (U. Arizona), NASA
The dunes have a morphology indicating formative winds blowing from east to west (from right to left).
The dark arc-shaped droplets of fine sand are called barchans, and are the interplanetary cousins of similar Earth-based sand forms.
Barchans can move intact a downwind and can even appear to pass through each other.
Image from the Wikimedia Commons
via apod
- See also:
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