Wow - Mammoth cross beds? Unconformity?
Look at the second knob from the left - the widest one. See how the bedding dips at about 30 degrees to the right? The rightmost knob has similar dip...
Either this is part of a giant aeolian (wind-formed) dune, or there's a major unconformity there. There might be something here to do with the deformation due to cratering that EP called attention to. The nature of that white bathtub ring is quite important here - is it a flat layer pre-cratering, or post-crater?