Found this on the track into my work camp, going to use it as a garden feature if I can get it on the ute, it must weigh around 70kg. The brown rings look like ironstone
Thanks RedDirtDigger, wondered what it was. I found another rock (ironstone I think) in the same area, It's about 10" across and about 4" thick and I call the turtle because it look like a turtle shell. The odd thing is that this rock is hollow, I mean real hollow about a 1/4" thick shell and inside a blob of molten rock of unknown origin about the size of a 50c piece. Will put up pic tomorrow.
Mick