shock waves

• by Tonyken1959

  two lines from 'impact crater' on right - shock waves?

  Posted January 11, 2013 3:35 PM

• by Kitharode moderator

  You could well be right about that. If not, perhaps the edges of separate overlapping craters. I'm collecting this sort of image, so thanks for a new addition.

  Posted January 11, 2013 9:42 PM