Post 3, last pic, bottom 2--need better pics of them both cleaned up and at different angles with a size ref (coin). Left could be a quartz core and the right could be what's left of a (granite??) axe. Your attachment in Post #6 didn't load.
I might keep that Groot rock handy. It could chock a wheel at the very least! You might could drive up on it and wash your whitewalls too! For real, I'd do that!
*My groot rock is my best friend. It is my life. I must master it as I must master my life.....So be it, until victory is America’s and there is no enemy, but peace!