Eek! It looks like the Monolith.
No kidding :dubious:
Umm, and you’re being shitty because…?
Rover loose on Mars.
It’s dog pee.
Slate, near the surface.
You know that was a photoshopped image, right?
I wasn’t being shitty, just acknowledging your (presumably ironic) stating of the BFO. No offence intended. 
Yes. We need a “tongue-in-cheek” smiley.
Gotcha. It’s water under the monoli…er… bridge now. 
Dunno if Bosda was being ironic here, or if slate is possible under presumed past Martian conditions –
But, someone with xenogeological knowledge:
What sedimentary rocks are possible on a planet without open water? I’m sure Mars is well stocked with most grades of sediment, from cobbles down to clay-size particles – but (1) Would they cement/compress into rock in the absence of water? (2) What rocks? How would they differ from terrestrial rock forms?
No irony intended.
There was once running water on Mars…we know that.
So, slate.
E.T. sneezed on the camera lens.