Channel or buried Crater fill?
In the upper right of this image, there seems to be a fill structure with very curved bedding. The surrounding layers seem to be uplifted somewhat, and the bottom fractured, so I think this is suggestive of a buried crater. The high angle and lateral continuity of the curved beds that fill this structure suggests subaqueous filling to me. On the left end of Burns Cliff, the highly layered part (just right of center), it does look like petrified dunes, I think, possibly with an erosional unconformity.