Planet Four Talk

Parallel lines,?not yardangs?

  • p.titchin by p.titchin

    The parallel horizontal lines on this are unusual. The image is from the upper end of the HiRISE col strip. Any thoughts? Are they yardangs?

    Posted

  • wassock by wassock moderator

    I think not yardangs. This part of the area covered by the huge image in the "evolution or degradation" thread. The place where the small image is taken from is where the polygonal formations at the bottom are beginning to change into something else (or vicaversa). Been looking at this for a while now, the standard model for the polygons is that its due to some sort of freeze thaw action, if this be true then it would seem to follow that the differing structures are also due to different types of freeze/thawing, maybe the thick ness of the underlying ice varies?

    Posted

  • wassock by wassock moderator

    This a bit further up, our old friend the space chimney

    enter image description here

    Posted