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  2. Theese are from Evia island Greece an Upper Miocene site with fossils. Any idea what can be the oblong ones ? The cones are freshwater gastropods that can be seen. there is also round and some arced ones. Some have hole in the centre some not . The size also varies a lot from 1 cm to 10 cm
  3. Crinoidal Holdfast?

    Yes, that's a nice little crinoid holdfast, or possibly another stalked echinoderm. Think it might be a bit difficult to isolate which one though.
  4. Extracting bone from Aust Cliff matrix

    Moved to Fossil Preparation. Welcome to the Forum. Air scribes and air abrasion are the usual methods, although dental picks, scribes, and rotary tools can be used with some success, depending on hardness of the surrounding matrix. A search through this Forum will bring up techniques.
  5. Unknown dinosaur? bone

    Hi paleoguys! Some years ago a friend of mine found on the Isle of Wight-the UK (dinosaur coast/Barremian age) what seems to be a reptile bone. It looks like a transverse process or something like that. We have no idea. We'd be very grateful if you enlight us and solve this mystery. More picture to come...
  6. In my attempt to self educate myself, I am tring to find as much information on the Texas Cretaceous fossils I find. I am a bit confused about the scientific notation of genus species. For example, in much of the literature, there will be a name in parenthesis : like Pecten (Neithia) texanus or Trochus (Tectus) texana. (examples from the Studies of Some Comanchean Pelecypod paper). And in the Field Guide to Fossils of Texas, Mesalia (Turritella) seriatim-granulata and Gyrodes (Sohlella) spillmani. What does that mean? Is Pecten the proper name or Neithia? Is it Mesalia or Turritalla? Or is it both? Or if there is a question mark after the genus - like Cerithium? barionnenne or Pseudomelania ? pupoides (Both examples from the Studies of Some Comanchean Pelecypod paper). Are they just not sure if that is the proper Genus and leaving it open to interpretation and further study? Any help is appreciated!
  7. Today
  8. Mosasaur prep, jaw section

    That's one cool thread. I've been blessed enough to find a variety of mosasaur, statodus and coprolite so I really enjoyed watching your prep job.
  9. Crinoidal Holdfast?

    Here is a picture of what I believe to be a crinoidal holfast on a brachiopod shell. This is very small (scale on the side are mm's) but I thought it was pretty neat looking. I found this while cleaning some of my material I collected earlier this year from the Haragan Formation (Lower Devonian) near Clarita, Oklahoma. When I first saw it, I thought: "this looks like a little starfish", then I learned to count! So I am assuming this a a holdfast, but I am wondering if anyone can : 1) confirm that; 2) provide any more precise ID; 3) point me to any references that might help. I have gone through Oklahoma Geological Survey Circular 55 on crinoids, but did not see anything like it (it doesn't have much on holdfasts, no surprise). Thanks for any help anyone can offer.
  10. Is this an egg?

    chert nodule. not an egg. sorry.
  11. Basically Mosasaurs are water lizards from lizard family, they have a short neck, long tail, robust teeth and ball-and-socket verts. They lived in Cretasceous. Pliosaurs are unique reptiles close to plesiosaurs (basically a type of the latter and sometimes undistinguishable), they have short or long necks, short tail, curved teeth and dual concave verts. They lived up to Cenomanian-Turonian boundary event 90 mya (before mosasaurs). They and plesiosaurs used both pairs of flippers equally (unique for water reptiles/mammals whose hind legs are prone to disappearance). Some of them reached giant proportions and were apex predators.
  12. I think pyrite can still oxidize under sertain conditions although it is generally more stable. Here is what I found on the internet: " Pyrite will slowly oxidize in a moist environment, and release sulfuric acid that is formed during the process. Well-crystallized specimens are generally relatively stable, while pyrite formed as sedimentary concretions has a tendency to decompose quickly. " https://www.mindat.org/min-3314.html
  13. I am keen to start prepping Yorkshire Ammonite nodules that I've been collecting for the last 10 years, beyond the 'split with a chisel and hope for the best '. I've never used an airpen before and would like advice on purchase and use. IS there a good first time guide or advice to follow for purchasing the right kit? I'm also keen to explore the prep of pyrite nodule cannonballs from Yorkshire. Is this just a case of wet dry sandpaper and a lot of elbow grease? once the pyrite polish is achieved, do they stay shiny, or will they oxidise over time? Is there a way to avoid oxidation via a chemical addition or layer of varnish, etc. All help very much appreciated! Steve
  14. Hi everyone, I am new to fossil hunting and recently took a trip to my local spot at Aust cliff in Bristol. I found some small chunks of bone bed about the size of a golf ball along the foreshore which I can see have small bits of bone including teeth. Does anyone have a good technique to extracting these without damaging the interesting bits. Cheers
  15. Virginia is loaded with fossils. The Valley and Ridge province has paleozoic fossil sites. From the inner coastal plain to almost Virginia Beach there are plenty of Tertiary sites. Google "Virginia Fossil sites". Also google "Virginia Geology Map". The Jasper Burns book is a must have for the region. There's also a 1985 pdf from the Geological Survey that will show up on your google search. I would also recommend Macfall's "Fossils for Amateurs".
  16. The Keichousaurus market is full of badly prepared and enhanced specimens but it is possible get nice specimens . I think with keichousaurus you need to not rush a purchases, it may take a couple of months to find a nice specimen at a good price. Try “before you buy “ and post here first. Saying that I have seen lots worse than yours All the best Bobby
  17. Definitely a learning moment. Sorry it happened at such an expense. When buying fossils, certificates of authenticity (CoA) are virtually meaningless as anyone with a laser printer can make one and claim the item is authentic. When you next want to take the purchasing plunge, do post the item on the forum first. Sometimes even reputable sellers are not entirely spot on about the items they acquire for sale.
  18. Split out from a different topic into it's own topic. That seems a lot of money for a very poorly prepared and heavily painted fossil.
  19. Sorry the forum does not give valuations it is taboo.
  20. We don't give valuations on the forum, I'm afraid, tis against the rules. And rather subjective. Have a look at the prices of other specimens available online.
  21. Thank you @grandpa I see now that Pliosaurs had longer necks and shorter tails and Mosasaurs were vice versa. The fin difference is interesting as well. Great example of convergent evolution.
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