Interesting, not sure what to make of the image. Checking, there do not appear to be images with a more appropriate filter (L5) to get the details we
might work with.
Looking at the scene on full context, the curved lines may well be natural formations. Having said that the image does raise some good questions. One
is 'what is that strange light-effect that overlaps the shadow area?' as noted by a later poster.
I'll give you a couple of picks from the last few days viewing, one of which will blow your mind. This will demonstrate the wonders of pareidolia.
The first is a good example, found at :
marsrover.nasa.gov...
Here is the sample from the image, which contains what appears to be a face looking at the rover:
Upon higher magnification the face becomes less distinguishable, though some may still see a face. It is quiet difficult to see, but once you do it is
like Wow!
This second image I think is not a case of pareidolia, nor is it a natural creation (Indeed, the wider MRO image shows exact similarities with
previously noted symbols).
hirise.lpl.arizona.edu...
The sample is here:
For the perfect faces on Mars, we zoom in. This is it: