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Found 24 results

  1. Vopros

    Could it be a bone

    The pictures are bad, besides it is an opal, which was probably photographed wet. However, maybe you would be able to suggest something by its shape? It is from Lightning Ridge, Australia. Thanks!
  2. Here are two microscopic images of an opal from Lightning Ridge, Australia. The piece of the opal I filmed is around 1/3 of the specimen length around 8 mm. The dimensions of this opal are 25.000 x 20.000 x 10.000 mm
  3. Vopros

    Is any a bone?

    Here are two opals from Lightning Ridge , Australia. They are wet (not my pictures), and no bone structure is seen, but just by looking at the shape, what do you think?
  4. This is an opal from Lightning Ridge. Bought it as fossil wood. However, IMO it does not look as wood. To me it looks more as a Coprolite. Here is a video. It is 5 minutes long to show the specimen from different angles dry and wet, and there are some microscopic images by the end. What do you think? Thanks! https://youtu.be/j1b1RdRmZmU
  5. George E. Mustoe and Elizabeth T Smith, 2023. Timing of Opalization at Lightning Ridge, Australia: New Evidence from Opalized Fossils. Minerals 13(1471):1-43. Christian Voiculescu-Holvad, 2018. The Opalised Fossils of Australia: Mineralogical and Paleontological Treasures from the Australian Outback Yours, Paul H.
  6. The Amateur Paleontologist

    Fairly recent bit of opal fossil research

    After learning about Weewarrasaurus, I thought it'd be nice to report the 'lesser-known' recent bit of research about the opalised fossil site Lightning Ridge (New South Wales, Australia) It's basically the most up-to-date paper dealing with the geology - including age, stratigraphy and lithology - and vertebrate paleontology. The paper provides many new details about the Griman Creek Formation (GCF), a Cenomanian (mid-Cretaceous) formation which crops out in the area around Lightning Ridge. The GCF is a formation especially known for its diverse vertebrate paleo-ecosystem; of which many species are represented by quite a few opalised fossils The paper is also rather neat as it contains a nice overview of all the vertebrate groups represented at the GCF - an overview complete with a comprehensive (and up-to-date) list of vertebrate taxa, and several nice pictures of opalised vertebrate fossils Finally, the paper also indicates that a new ornithopod genus (Fostoria) from the GCF is soon going to be published Bell, P. R., Fanti, F., Hart, L. J., Milan, L. A., Craven, S. J., Brougham, T., & Smith, E. (2018). Revised geology, age, and vertebrate diversity of the dinosaur-bearing Griman Creek Formation (Cenomanian), Lightning Ridge, New South Wales, Australia. Palaeogeography, Palaeoclimatology, Palaeoecology. Abstract: The mid-Cretaceous Griman Creek Formation (GCF), which crops out near the town of Lightning Ridge in the Surat Basin of north-central New South Wales, Australia, is noteworthy for its opalised vertebrate fauna. The fossil assemblage comprises remains of aspidorhynchid teleosts, lamniform chondrichthyans, dipnoans, chelid and possible meiolaniform turtles, leptocleidid-like and possible elasmosaurid plesiosaurians, anhanguerian pterosaurs, titanosauriform sauropods, megaraptoran theropods, ankylosaurians, several forms of non-iguano- dontian and iguanodontian ornithopods, crocodylomorphs, enantiornithine birds, and stem and true mono- tremes, making it one of the most diverse mid-Cretaceous terrestrial vertebrate faunas in Australia. A detailed stratigraphic survey of twenty subterranean opal mines provides new information on the geology, age and pa- laeoenvironment of the main fossil-bearing beds. Vertebrate remains derive from the ‘Finch Clay facies’, lat- erally-extensive but discontinuous lenses of claystone that likely accumulated relatively rapidly in near-coastal but freshwater embayments (i.e. lagoonal conditions), and probably represent a single, roughly con- temporaneous fauna. U-Pb age dating of detrital zircons extracted from a distinct layer of volcanogenic claystone immediately overlying one of the opalised fossil-bearing layers yields a maximum depositional age of 100.2–96.6 Ma. These new dates confirm an early to mid-Cenomanian age for the fauna, rather than Albian, as has been reported previously. The GCF at Lightning Ridge is therefore equivalent to the middle part of the Winton Formation (Queensland) and several million years older than the sauropod-dominated fauna at Winton. For those who want the paper, PM me your email address and I'll send it to you -Christian
  7. Vopros

    Opal pine cone

    In this video there are two pine cones. The big one is from Argentina, and the small one is an opal from Australia
  8. High-tech tools reveal opalized fossil skeleton by Flinders University, August 29, 202 Absolute gem of a find: Opalised dinosaur fossil studied using innovative 3D printing technology. The rare fossils may represent a new Australian dinosaur species Cosmos Magazine, August 29, 2022 Dinosaur Bones Shimmering With Opal Reveal a New Species in Australia A discovery in an Australian opal mine remained unexamined for three decades—it turned out to be the most complete opalized dinosaur skeleton in the world, Gemma Conroy, Smithsonian,June 3, 2019 “Opalized” Dinosaur Skeleton Discovered 30 Years Ago, Now Scientists Have Named the Species. One man was hunting gems and found a load of natural history instead. Rose Heichelbech, Dusty Ol Thing Bell, P.R., Brougham, T., Herne, M.C., Frauenfelder, T. and Smith, E.T., 2019. Fostoria dhimbangunmal, gen. et sp. nov., a new iguanodontian (Dinosauria, Ornithopoda) from the mid- Cretaceous of Lightning Ridge, New South Wales, Australia. Journal of Vertebrate Paleontology, 39(1), p.e1564757. Yours, Paul H.
  9. ChrisSarahRox

    Possible bone?

    This one is from Pedy and it's on the top shelf. I was once told of the possibility that it could be a fossil, would be awesome but I would still be ok with this being " just a rock."
  10. I love the useful information on the fossil forum. For something different I have posted some pictures of where I "mine" fossils from 20m underground in an old opal mine. I am extending an old mine tunnel to find occaisional opalised fossils. The first picture below shows my current tunnel and the second picture the "rock" layer that contains traces of opal and opalised fossils. The rock is quite weathered and can be dug out with an electric jack pick. The majority of fossils that I find do not have gem opal colour play, but they do have exceptional presevation.
  11. Aussieopal

    Opalised bone?

    Hi all the imaginative one back again This time I am curious as to wether this could be a fossil replacement opal? The photos are not very good because it is quiet small, possibly about the size of a pea. The play of colour in this little thing is absolutely amazing! Every single colour on the spectrum from common blues and greens to beautiful orange, red and yellow. It was found in lightning ridge Australia in a $5 lucky dip bag my kids got. To me it looks like a piece of spine or tail bone but once again i love to imagine! Very excited to hear what you all think... They may say that I am a dreamer.... But I am not the only one!
  12. This is from an email exchange between Dr. Elizabeth T. Smith (of Lightning Ridge and author of the singular "Black Opal Fossils of Lightning Ridge") and I, last month. [Liz also co-authored "Ornithopod diversity in the Griman Creek Formation (Cenomanian), New South Wales, Australia" which was first published in Peer J magazine and which established the new species of herbivore, Weewarasaurus pobeni.] "To explain, it's 0345 and I have insomnia intensified by my excitement about an opalised Lungfish plate I bought today from a top bloke mining at Emu Field (Coocoran), and a little bone I found while going through several hundred pieces of a Ridge miner's selections over the last 4 days. I know it was unfair of me, Liz, to send you that photograph and ask you to guess where/what the piece was from one photograph, not having the advantage that I did of the dish in front of me, pieces wet, under a light. [Digression: before you read on, have a look at the rocks in the dish below and see if you can spot the 'treasure'] : I have sent the same photo again (above) and I'll guess you have a grasp of some Cartesian Geometry so I want you to imagine that the dish has a horizontal X-axis and a vertical Y-axis through the middle which becomes the Origin, the point (0,0). Let's say each axis is 20 units long (which is pretty close to its actual length of 22cms). . The piece in question is approximately at the Point (1,3). What caught my eye was the nearly circular concavity, which irl is about 6mm in diameter. As you know, bones (neck, tail, if turtle) often have those concavities which made that piece stand out in the dish as my eyes roamed at first glance over the contents. The second photo, cropped, is a close-up using the rock at 6 oclock (at the bottom) as (0,0). As I said, I had been going through the material for nearly 4 days, about 20 hours all up, and I was close to the end of the lowest grade of potch and colour (well, potch and potch, really, ha! ) in the bottom of the container he gave me as part of a deal that we did, oh, I don't know, maybe 4 or 5 years ago. I had been through the rest of it not long after I got it, but I went through it all again this week, including the lowest grade (but the latter for the first time). It's not a big-money or spectacular piece with any colour through it. In fact it's rather dull (grey), unassuming, and could easily be mistaken for just another piece of Grey potch in host Rock. A small bone of inconspicuous presence, it does not shout "OH WOW!!" like the little croc tooth on the cover of your wonderful book. If it was one of Portia's caskets from "The Merchant of Venice", it would be the lead one. However, I am typically/predictably enchanted by it, as plain as it is. In your own language, one of the transverse processes on one side of the neural arch has been worn away, either in the process of deposition, or washing in the agi. It's a bone with only one wing, so to speak. But you'll see more of that in the next email when I send you some more photographs. Until I found it, I was going to text the miner and congratulate him on not missing anything. The more unusual or really interesting pieces he takes out --- he has a great eye for detail and for the unusual --- and puts those in separate small bags and has often identified small bones himself, for example a lovely small grey croc scapula (July 2017) and another small bone which I think is turtle and has a little colour in it. The miner is quiet, unassuming, never skites about anything he finds and through our common fascination with opalised fossils, we have become opalised-fossil mates. The sheer volume of non-commercial opalised pieces that he has found and kept only because he finds them so interesting is staggering. Some of the pieces are so tiny I am surprised that he even sees them. I believe he worked two claims at Allawah which were smack on top of an ancient Cretaceous billabong or maybe a creek or similar. The hundreds of pieces that he has kept contain just about anything and everything opalised that you can imagine, or have seen, and plenty of stuff I've never seen before! To my knowledge I don't think there have been any fish vertebrae, but many gastroliths ("yabby buttons"), opalised pine cones, many hundreds of pieces of opalised wood some of which are very pretty or have great shape/contours/lines. Gastropods and other shells, too. Also turtle remains (a few pieces of shell and bones), croc too, and I think at least one Dino bone (not sure). There's also pieces that look like coprolite; worm tubes as well. I can't wait for you to see the whole collection and although I have spent many hours rebagging and measuring and weighing and adding notes/descriptions there will be many more hours spent on it. I can foresee somebody doing valuable research or even a thesis on his collection alone. The wealth of opalised geological, flora and fauna pieces from one small area is jaw-dropping. Most miners would have thrown a lot of it away. His collection is also an excellent summary of the story of opal mining. A lot of hard work over many hours for not much reward and even when there's a huge volume of opalised material only a small percentage of it contains colour, or commercially valuable stones. My guess is that this latest piece --- one tiny bone in many hundreds of pieces, about 5kgs of rough --- is turtle but it has one really unusual feature that I've never seen before but I'll save that for your call after the next email. I may not finish it this morning. It's now 0435 and I'm starting to fade a little bit. All the best, M. P.S. In this 3rd photo where I am holding the piece, a very small fragment has been broken off (middle top left) but is held in place by host rock. Very unusual. Hi Liz I'm sending you some more photos now. One end has a round, smooth and convex protrusion. The other end has that lovely little concavity. Both are about 6 mm across. I'm guessing that the rounded concavity is the rear of the Piece in which the rounded convex protrusion of another piece would fit and move smoothly. Is that right? Separated by cartilage when alive? One of the little "wings" (transverse processes) on the left side is missing, probably broken off by mining or when being washed in the agi. No colour, but otherwise the preservation is very good thanks to the host rock I suspect, as you noted. In that same photo you can see that I started to clean off some of the host rock on the bottom right hand side but I stopped when I realised that some of the host rock also contains other little bits of detritus or whatever that might have scientific interest, so I'm not going to clean it any further. At its widest, it's 14mm but that would be closer to 19 or 20 mm across if that "wing" on the rhs hadn't been broken off or damaged. 10mm high. As is, it weighs 9.6 carats but I would estimate that at least 2 to 3 carats are host rock. Both of the convex and concave ends are about 6 mm but not really circular as much as rounded trapezium, if that make sense? I await eagerly your thoughts! M."" Dr. Smith has confirmed that it's from a turtle, probably caudal at the base of the tail. I know the above is a long read, but I've tried to explain how tedious going through 5 Kgs of potch'n'colour can be, except when one is rewarded by such a lovely little treasure!
  13. Dino bone from the famous Lightning Ridge opal mines leads to first ID of this rare type of predatory dinosaur in Australia. A second, 20 million year older example also recognised during their studies. https://m.phys.org/news/2020-01-predatory-dinosaur-added-australia-prehistory.html
  14. Building a home for dinosaur fossils with extra opal bling at Lightning Ridge By Sally Bryant, Australian Broadcasting, https://www.abc.net.au/news/rural/2015-02-03/dinosaur-fosssils-with-opal-bling-at-lightning-ridge/6065346 A couple of papers are: Meakin, S., 2011. Geodiversity of the Lightning Ridge area and implications for geotourism. In Proceedings of the Linnean Society of New South Wales (Vol. 132, p. 71). https://www.academia.edu/24823750/Geodiversity_of_the_Lightning_Ridge_Area_and_Implications_for_Geotourism Watkins, J.J., Behr, H.J. and Behr, K., 2011. Fossil Microbes in Opal from Lightning Ridge: Implications for the Formation of Opal. Division of Resources and Energy. https://pdfs.semanticscholar.org/6e7a/9d5d30343d24a9efb4c15d37602a32c3b10c.pdf?_ga=2.69785872.1453044388.1578279722-895145303.1578279722 https://www.semanticscholar.org/paper/Fossil-microbes-in-opal-from-Lightning-Ridge-—-for-Behr-Behr/6e7a9d5d30343d24a9efb4c15d37602a32c3b10c Yours, Paul H.
  15. dinosaur man

    Theropod from Australia?

    Hi I found this online and am wondering if its a tooth?, or just a piece of opal. Its 2mm, and is from Lightning Ridge Australia. Thanks!!
  16. Hi I’m wondering what Theropods are found in lightning Ridge Australia @Down under fossil hunter
  17. Chasing Opal and Fossils in the Australian Outback An ambitious collaboration between scientists and a local mining community seeks to preserve one-of-a-kind opalized fossils. BY Clare Watson, Undark https://undark.org/article/chasing-opal-fossils-australian-outback/ A recent paper is: Bell, P.R., Fanti, F., Hart, L.J., Milan, L.A., Craven, S.J., Brougham, T. and Smith, E., 2019. Revised geology, age, and vertebrate diversity of the dinosaur-bearing Griman Creek Formation (Cenomanian), Lightning Ridge, New South Wales, Australia. Palaeogeography, palaeoclimatology, palaeoecology, 514, pp.655-671. Yours, Paul H.
  18. Opal-Filled Fossils Reveal Timid, Dog-Size Dinosaur That Lived Down Under By Laura Geggel, January 17, 2019 https://www.livescience.com/64522-opal-dinosaur-fossils-in-australia.html https://www.sciencealert.com/a-gorgeous-opalised-fossil-turned-out-to-be-an-unknown-species-of-dinosaur Bell, P.R., Herne, M.C., Brougham, T. and Smith, E.T., 2018. Ornithopod diversity in the Griman Creek Formation (Cenomanian), New South Wales, Australia. PeerJ, 6, p.e6008. https://peerj.com/articles/6008/ Yours, Paul H.
  19. rodrex

    opal fossil, what is it?

    Hello All, I was hoping that someone could help me identify this bone? its from the mid-Cretaceous Griman Creek Formation of Lightning Ridge Australia I don't think its a yabby button or turtle shell, as the piece is not rounded like a yabby button and there is bone texture. the piece is bilaterally symmetrical and there appear to have joins or groves where the bone meets. The underside is not flat like I would expect for turtle shell... Looking forward to your replies Rod
  20. Paleoworld-101

    Opalised Pine Cone

    From the album: Opalised Fossils

    Name: Opalised Pine Cone Age: 110 million years old Locality: Lightning Ridge, New South Wales, Australia Formation: Griman Creek Formation Length: 16mm long Notes: This is an opalised pine cone from Australia. It is quite a rare specimen and is a great addition to my opal fossils collection. This specimen was kindly given to me by my friend Shaun. Thanks mate!
  21. Paleoworld-101

    Opalised Bivalve Shell #1

    From the album: Opalised Fossils

    Name: Opalised Bivalve Shell Age: 110 million years old Locality: Lightning Ridge, New South Wales, Australia Formation: Griman Creek Formation Length: 25mm Notes: This is an opalised bivalve shell from Australia. Unlike the marine shells from Coober Pedy, the other hotspot for opalised fossils in Australia, the shells from Lightning Ridge are less common and come from a freshwater river environment. This one is open, and clearly shows the ridged pattern of the shell it once was. A nice addition to my opal fossil collection.
  22. Paleoworld-101

    Opalised Bivalve Shell #2

    From the album: Opalised Fossils

    Name: Opalised Bivalve Shell Age: 110 million years old Locality: Lightning Ridge, New South Wales, Australia Formation: Griman Creek Formation Length: 32mm long Notes: This is another opalised shell from my collection, kindly given to me by my friend Shaun. Thanks mate!
  23. Paleoworld-101

    Opalised Dinosaur Vertebra (Photo 2)

    From the album: Opalised Fossils

    Name: Opalised Dinosaur (Caudal?) Vertebra Age: 110 million years old Locality: Lightning Ridge, New South Wales, Australia Formation: Griman Creek Formation Length: 16mm end to end Notes: This is an opalised dinosaur vertebra from Australia. I originally bought it as an opalised 'reptile' vertebra but it's ID as being a dinosaur vertebra was confirmed by one of the leading experts on the opalised fossils of Lightning Ridge. It is likely a juvenile ornithopod or theropod vertebral centrum, missing the tall neural arch. It is semi-transparent when held up to a strong light and is an exceptionally rare specimen. So far it is the only vertebrate fossil in my opalised fossils collection but I hope I am able to acquire more soon. Specimens like this very rarely come up for sale as most of them end up in museum collections due to their rarity and scientific value
  24. Paleoworld-101

    Opalised Dinosaur Vertebra (Photo 1)

    From the album: Opalised Fossils

    Name: Opalised Dinosaur (Caudal?) Vertebra Age: 110 million years old Locality: Lightning Ridge, NSW, Australia Formation: Griman Creek Formation Length: 16mm end to end Notes: This is an opalised dinosaur vertebra from Australia. I originally bought it as an opalised 'reptile' vertebra but it's ID as being a dinosaur vertebra was confirmed by one of the leading experts on the opalised fossils of Lightning Ridge. It is likely a juvenile ornithopod or theropod vertebral centrum, missing the tall neural arch. It is semi-transparent when held up to a strong light and is an exceptionally rare specimen. So far it is the only vertebrate fossil in my opalised fossils collection but I hope I am able to acquire more soon. Specimens like this very rarely come up for sale as most of them end up in museum collections due to their rarity and scientific value.
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