Petrified Mud

As far as I can tell, this piece of dried mud is petrified. It does not change when sitting in water and sounds like a regular rock when banging it against another.

(This is actually not a Belize rock, so maybe it should not be on this blog, but I would like to include it anyway. It was found, if I remember correctly, in the US in one of the national parks.)

More identical unexplained rocks

 I showed you the one on the right before, wondering how is was formed. Well, I still wonder. Maybe even more so, as
I found a similar one.

 the one on the left has very similar marks, only finer.

 I see that I have a few followers by now. (thank you guys!) Is there anyone out there that knows more about these rocks than I do? I hope one day someone will venture forth and tell me what they think, or know!

Pine ridge rock

Grey (granite?) rocks with white quartz veins

 I have a fascination for these grey rocks with white lines. There's always another unique one to be found.

Whoopie pie, anyone?

Pine Ridge rock.

brother rocks

Sometimes we find a unique rock, as the case was with the following rock, found by my son who only picks up rocks of great value to me!

It is clearly a layered rock of some sort. It has a flat surface.

 Then recently I found its brother...