Tag Archives: aeolian

Textured gullies

A piece of Mars. These are gullies on a martian hillside (upslope is to the upper right). Water may be what forms the channels, carrying soil and rocks downslope. The textured pattern of the lower slope is caused by the ...

A way through

A piece of Mars: Wind ha blown the dark, rippled sand between jagged hills, from top to bottom in this frame (663 m or 2175 ft across). Regardless of the terrain, sand finds a way to get through -- just ...

Mars is watching you…

A piece of Mars: This looks like a pair of eyes looking at us. It's really some small brown hills, two of which (the "eyes") are surrounded by dark gray sand that has blown into scours as the wind interacts ...

How the wind turns

A piece of Mars: The two shadowed hills in the upper part of this frame (497x373 m or 1631x1224 ft across) rest on a flat plain covered in large ripples. On the plain the ripples are aligned north-south, formed perpendicular ...

What on Mars?

A piece of Mars: What on Mars is this (the scene is 600x450 m, or 0.37x0.28 mi)? It can be hard to tell. The lines are ridges of windblown dunes or ripples, the dark gray stuff is active sand blowing ...

Summery dune

A piece of Mars: Last December I blogged about a picture of a sand dune taken in early northern spring. This is the same dune, without frost, now that summer has come to the northern hemisphere and all the frost ...

Where is Curiosity on her 1 Mars year anniversary?

A piece of Mars: Curiosity has been trolling around on Mars for one martian year, so I think it's time I posted an update on where it is and what it's seeing. Right now (late June 2014), the rover is ...

Swirly rocks

A piece of Mars: Never mind the 4 m (13 ft) boulders that have fallen downslope, or the rippled sandy surfaces here. Look at those bright swirls in the ground. Those are the former interiors of sand dunes, which were ...

Whither the wind

A piece of Mars: Which way did the wind blow here? You can tell by looking at the dune and its ripples. The slip face (the avalanching slope of the dune) faces downwind, so the strongest wind here mainly blows ...

The always-changing landscape

A piece of Mars: Over time, windblown sand can wear down a surface. This isn't so common on Earth, where water, ice, and life are more likely to change the landscape, but it's typical of many places on Mars. Here, ...