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I found this really interesting rock while cleaning my pond over the weekend. The pond is lined with round river rocks (presumably mined here in Oregon) and this one caught my eye as I was cleaning. When I looked at it a little closer, it appears to be petrified wood with some type of bore holes. Some of the bore holes are filled with what looks like agate and others have what one might imagine a dried out petrified worm might look like. I looked at it under magnification and noticed what looks like a couple of very small (<1/8") fossils. The clearest one is in the center of the first photo. One half looks like a series of radial lines (like a pill bug) and the adjacent half looks like really tiny scales or similar regular texture which isn't really visible in the photo and I couldn't get a shot through the scope. Is this actually petrified wood with bore holes and how does the agate-like material get in there and could a worm or grub get petrified? Thanks for your thoughts. Steve