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Harry Pristis posted a gallery image in Members Gallery
From the album: PLANT, WOOD & MINERAL SPECIMENSIn the Early Pleistocene, about two million years ago, this pine cone cob was driftwood in the paleo Santa Fe River. The waterlogged wood sank to the bottom in a basin in the river channel. They became buried in a highly organic mud during seasonal flooding. This anaerobic, low-energy burial preserved fine details such as bark and even insect borings. The cob is thoroughly mineralized with apatite -- it 'clanks' when two pieces are tapped together. It is not "silicified" as labeled. This pine cone cob is dated biochronologically by the vertebrate fossils also found in the mud, nota
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