The following image was taken by ChemCam: Remote Micro-Imager (CHEMCAM_RMI) onboard NASA’s Mars rover Curiosity on Sol 1796 (2017-08-25 11:40:17 UTC).
The image below shows some interesting very small objects:
1. Carved stone depicting the head of a reptile
2. Life form crawling on the surface
3. Carved stone depicting a figure with helmet
4. Life form that looks like a worm and the life form depicted in image 2.
Of course, the interpretation of the objects is as I see it. The very small objects can also be rock particles, but apparently something has attracted NASA’s attention, on which they have decided to take a close-up image especially of this part of the rock.