Category: HiRISE images

HiRISE images

Overhang

A Piece of Mars: There's a fabric of erosion in this 1x1 km (0.62x0.62 mi) scene, with the main wind blowing from lower right to upper left (and if you look carefully you'll see there's a second, subtler fabric a ...

Island in the stream

A Piece of Mars: In the floor of what might have been an old fluvial channel there are a bunch of really neat dunes (or maybe ripples, they're TARs and we don't know yet what they are). One spire pokes ...

Black and tan

A Piece of Mars: Dunes in the top row in this 0.73x0.47 km (0.46x0.29 mi) scene are dark but those in the lower row are brighter. Why? They're all probably made out of the same kind of sand, which is ...

Mars’ corduory

A Piece of Mars: The wind on Mars likes to make textiles (unfortunately the term geotextiles is already taken for other purposes). This 1x0.6 km (0.62x0.37 mi) scene shows two different sets of ripples. The larger set has straight to ...

Just do it

A Piece of Mars: It's all about wind scour here in this 0.75x0.75 km (0.47x0.47 mi) view. The big "swoop" is an erosional channel dug into the surface by winds (blowing from the lower left) trying to erode the hills ...

Dust trapped on the lee side

A Piece of Mars: This 0.95x1 km (.59x.62 mi) scene shows the center of a small dune field. The dunes are shaped by three winds blowing from three different directions: from the west-southwest, east, and south. The north-facing slopes are ...

Leeward and poleward

A Piece of Mars: The sharp line in this 0.625x0.625 km (0.39x0.39 mi) scene is the crest of a long dune in Mars' southern hemisphere. The sunlit side is also the lee side: the bright streaks are thin sand avalanches ...

Endless wind

A Piece of Mars: This 2.88x1.13 km (1.79x0.70 mi) scene shows quintessential Mars, with a 670 m diameter impact crater heavily modified by wind erosion. Both the crater floor and the surrounding terrain are covered by what is likely loosely-cemented ...

Wind and maybe water too

A Piece of Mars: Along the right side of this 0.5x0.5 km (0.31x0.31 mi) scene is the rim of a crater - the stripes are layers exposed (and then perhaps draped by falling ejecta) as the crater formed. To the ...

Exhumed dunes!

A Piece of Mars: The large dunes in the middle of this 375x450 m (0.23x0.28 mi) scene run along a valley (the small dunes at top and bottom are on high ground). What's amazing about this is that the ends ...