Thanks Jimbob and Bowtarist
Thanks for the info Bubby! If I find some more, I will definitely try that.
Maddog , I don't know on that. I believe and some one correct me if I'm wrong, that there is no actual wood left in petrified wood. If memory serves me correct and it rarely does, petrified wood is minerals that have slowly replaced the wood as the wood eventually decomposed over many millennia . If that is correct, then it would have more to do with silica content and composition of the minerals that replaced the wood than it would the species.
Wolf Watcher, I hauled a load of fertilizer to Powell. I remember seeing a rock vendor along the way, but I can't remember if it was at grey bull or meeteetse. I would have stopped if I would of had time. Josh