Tag Archives: ripples

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 ...

Panda stripe dustslides

A piece of Mars: This 600x450 m (1969x1476 ft) scene of a hillside shows new, dark dustslides that slid downhill (to the lower left). Faint stripes of older dustslides are visible, covered by bright dust and small ripples. Thousands of ...

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 ...

Almost a dune

A Piece of Mars: This field of 2 m wide sand ripples has a dark splotch in the middle (the scene is 300x225 m or 984x738 ft). The splotch is the peak of a low hill that straddles the ...

Changing winds

A piece of Mars: There are two sets of ripples here: tan ones and gray ones, each oriented to a different wind (scene is 300x225 m, or 984x738 ft). The gray ones sit on top of the tan ones, so ...

Martian waves

A piece of Mars: The swirly candy stripes in these big dark dunes are layers inside that have been made visible by wind erosion (the scene is 1.5x0.9 km, or 0.93x0.56 mi). It's rare to see the inside structure of ...

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 ...

Small dunes up high, big dunes down low

A piece of Mars: This 1018x1352 m (0.63x0.84 mi) dune-covered scene has split topography: the the bottom part is up on a plateau, and the upper part is in a broad valley. The dunes up on the plateau are smaller ...