Tag Archives: topography

More Earth-like views of Mars

A Piece of Mars: In a recent post (Dunes in a Colorful Hole), I showed some dunes crawling over layered terrain, with a view that looked a lot like some desert regions of Earth. Here's another spot on Mars (0.95x1.1 ...

Dunes in a colorful hole

A Piece of Mars: Gray dunes have migrated over reddish rock, moving toward a narrowing cleft surrounded by tall tan cliffs. Bright lines on the dunes are exposed internal layers (bones of the dunes, really) that show you where the ...

Stripes by wind and gravity

A Piece of Mars: This scene (800x450 m or 0.5x0.28 mi) is a steep slope, with high rocky outcrops on the upper right and both gullies and ripples heading downslope to the lower left. The wider, brighter stripes are gullies ...

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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 ...

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 ...

Inverted crater

A piece of Mars: This circular hill is 200 m (~656 ft) across and ~48 m (~160 ft) high. It stands alone on a relatively flat plain. Why is it there? The surface here used to be ~48 m higher ...

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 ...