That is one thing I have found out about Richard, AKA avondale87 is that he is able to somehow know what a lot of things are built from AND HOW they are built!
don't get too excited Charles, but thanks for the acknowledgment.
Those chunks of rock look very reminiscent to some large pieces of fossil trees I've seen. Might be wrong though.
Live long and observe a lot, makes one - best not go down that track