Polished Full Round Petrified Tree Fern- Psaronius. Found in a creek bed, Athens Co. Pennsylvanian Age (Upper Carboniferous). Please check out my other listings of rare Petrified Wood. The item “Rare Petrified Wood Psaronius Tree Fern, Athens County, Ohio Carboniferous 10″ is in sale since Wednesday, October 28, 2020. This item is in the category […]