Pine Cone Cut and Polished Cross Section (Pair)Many of the best fossilized pine cones are from Patagonia, Argentina. Mostly, they come from two types of trees in that region: Araucaria and Pararaucaria are extinct coniferous trees that could have grown up to 330 feet tall! The trees were buried about 180 million years ago (Jurassic Period), during a volcanic eruption in the area.