[Crazieman]

Pretty sure that’s the rover’s drill imprint.

[Sir Napsalot]

You’ve said it before me. Second you opinion.

[cripplecreek]

I was thinking the same.

At my most optimistic I would say its a possible fossil of a small marine critter.

Unfortunately the video is from your typical nutbag site.

[Rebel_Ace]

Just for comparison, here is a photo of a drill impression from Opportunity:

It seemed typical of images I found for these kinds of marks.

[Rebel_Ace]

I think I know what this is now, seriously. I have been looking at the end effectors on the Curiosity Arm where the Microscopic Imaging Tool is mounted. This camera is made to "go in close" to view tiny, microscopic details.

So, the circle is WAY too small to be a RAT mark, however, I believe it is the IMPRESSION of a PHILLIPS HEAD SCREW, pressed into the soil when the robot was trying to move the arm end in close.

Take a look, and imagine what you would get if you pressed a flat, phillips head screw into the soil. Also imagine that it screwed into an enclosure, so a "ring" could form in the space between the screw head and the enclosure surface.



That is my reasoned opinion. It is an artifact produced by the rover itself, and if the cause is correct, we should be able to find "others" wherever the camera was pushed into a softer surface.

[Rebel_Ace]

As a quick experiment, I put some baking soda in a shallow dish, and shook it a bit to randomize the surface. I then pressed a Phillips Head screw into it.



Here is another impression, with the screw that made it next to it:



As much as I would like this to be a "fossil", I really think it is not.