Here are some of the petrified wood pieces that I picked up at my friend’s property in Northeastern Douglas County in Colorado this last weekend. The wood in Douglas County dates back up to 55 million years ago. To put this in perspective, the last phase of tectonic activity formed Rocky Mountains around 80-55 million years ago; so these are wood from the forests on the craggy, new Rocky Mountains! Interestingly, much more recently in time (about 100ish years ago), wood forested from the Palmer Divide was used to build cities like Denver. Forests have covered the land here in east-central Colorado for a long time!
So how did I find it, well, I just walked around and picked it up off of the ground, for the most part. It tended to be all together, so once I found something on the surface, I could search around that area and find more. I also tried digging some, and there was more under the surface as well.
Still searching for the intact logs on this property like was found recently at the Cherokee Ranch in central Douglas County! Anyone have any suggestions for lapidary treatment of petrified wood?