Tag Archives: ripples

Martian lace

A piece of Mars: This 300x300 m (984x984 ft) scene shows bright windblown dunes or ripples arrayed in a lacy pattern (the biggest ones are about 5 m, or 16 ft, across). This is near the landing site of Ares ...

Flow

A piece of Mars: Below this ~550 m (0.3 mi) wide crater lies a ~1.3 km (0.8 mi) long "beard", the wake of an ancient flow around the crater. Based on its location on Mars, I'm guessing the fluid flowing ...

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A piece of Mars: Ripples form endless chevrons in this 600x450 m (0.37x0.30 mi) scene. It's really the crest of a dune that connects all the vertices in the chevrons, making that straight line that runs nearly vertical through the ...

Dunes ignoring small hills

A piece of Mars: What happens to dunes as they move over rough terrain? This is what a barchan looks like on a relatively flat surface. If the hills are smaller than the dune, then it does its best to ...

On Mars, the wind wins

A piece of Mars: This scene (600x450 m or 1969x1476 ft) is covered in small craters, formed by the splash of a larger crater nearby. They cover everything, even the bright ripples visible on the right. So the ripples ...

Wind eroded mantle

A piece of Mars: The curving ridge of a mountain has signs of many small landslides. Mantled on top of these is an older set of landslides that has been partially eroded away. The rippled edge of this older deposit ...

Bearded craters and dunes

A piece of Mars: This 600x450 m (1969x1476 ft) scene has a complex sedimentary history. How are bearded craters and dunes formed? They weren't always bearded. At some point, a deposit of bright material accumulated on this surface, and was ...

The long, low dune

A piece of Mars: A long, low dune covered in long, linear ripples stretches across the scene (600x450 m; 1969x1476 ft). Dark gray areas on the dune show where sand has most recently moved. A small slip face has formed ...

Wind, wind, impact(!), and then more wind…

A piece of Mars: Some time ago, something hit the ground on Mars and made this impact crater, right into a field of ripples. Stuff thrown up during the impact fell back down, burying the ripples with the gray ejecta ...

Aeolian shoreline

A piece of Mars: On the left is a steep slope leading to a hill. On the right are waves - but not waves of water or any other kind of liquid. These are dunes or very large ripples, blown ...