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Found 23 results

  1. I would like to ask if anyone has experience with fossil preparation with the help of heat. My question is triggered by that topic: Authenticating quartz (?) Keichousaurus? - Is It Real? How to Recognize Fossil Fabrications - The Fossil Forum My hypothesis is, that this specimen was baked (as a whole or only superficially, with a blow torch, for example, possibly several times) to promote flaking off of the matrix. Could this be correct? Another question: Some time ago, a baked crinoidal limestone was shown here on TFF (with color turned from a somewhat uniform gray
  2. pachy-pleuro-whatnot-odon

    Preservation of colour in fossil shells

    Hi all, Some time ago I found this shell in (what I believe to be) the French Upper Muschelkalk (Triassic). Now I'm not into shells myself, but to judge from the remains of operculum on the underside of it, the specimen concerns an oyster. Most strikingly, however, the shell has a pattern of darker-coloured lines that do not correspond to any three-dimensional/elevational differences on the shell surface - which is, in fact, entirely flat. I haven't seen this on a fossil shell before. Now when doing a Google search for my response on whether it would be possible for cru
  3. dolevfab

    Cephalopod Shell Color!

    Hello all! Recently I have been obsessed with cephalopods and realized there is a real lack of reconstructions of the color patterns on extinct nautiloids and ammonites! This led me to compile a list of known fossil color patterns on cephalopods. After a year of on and off research, I found about 90 species of cephalopods retaining official or undescribed, original patterning on their shells. These are the first 15 species on my list. The color markings are based both on descriptions and photographs of the fossil material. The shades of the markings are based on the fossils, bu
  4. Hello, I'm looking at this shark tooth for sale, which is listed as Squalicorax bassani from the Phosphate beds of Morocco (scale in cm). I quite trust the seller and as far as I can tell it looks to be the correct species based on a cursory search. However since I am a complete rookie to teeth and have never bought any before, I wanted to ask for a confirmation on the species, and ask how is the quality? Is it good/medium/bad? The other S. bassani teeth I see don't usually have this reddish brown coloration, rather they are ivory/black and shiny, com
  5. Hello, I had a question about the coloration of the beautiful South Dakota ammonites from the Fox Hills formation/Pierre Shale. Namely, many Hoploscaphites/Discoscaphites ammonites have a milky white nacre of the shell, whereas others seem to have a vibrant red/brown sheen. For example here are two photos of Hoploscaphites nicoletti I found demonstrating the two types of colorations: I was wondering what causes the difference in this coloration, and whether one is more rare/valuable than the other? I want a nice South Dakota ammonite for my collection
  6. http://www.sci-news.com/paleontology/dinosaur-carotenoid-coloration-10354.html Non-avian dinosaurs may have had bright color on their skin, scales and beaks in a manner similar to modern birds, according to a paper published in the journal Evolution. http://cdn.sci-news.com/images/2021/12/image_10354-Orange-Dinosaurs.jpg Link to article: Estimating the distribution of carotenoid coloration in skin and integumentary structures of birds and extinct dinosaurs [paywalled, sadly] My Uni does not have access- I'd love to read this one if someone has
  7. This piece of amber containing an inclusion of feathers was extensively cracked but had an interesting feature: it appears to show a silver reflective color in a distinct pattern. These tiny feathers have an apparent reflective substance on certain parts of primarily two adjacent feathers that show this pattern. In some angles a silver color is visible. How common is this? Do you think this is an actual color on whatever bird/non-avian dino it was a part of?
  8. It came up in another thread, so I figure it might be worth discussing: Let's talk resin pigments! Personally, I never bother with coloring the actual epoxy putty, but only because I'm more familiar with painting. I have from time to time, mixed in colored clays or matrix powders, but this was more for texture than color. I've seen folks use mixed colors of polymer clays to achieve these effects, but to be frank, I have yet to see a polymer clay that is durable enough to meet my needs and standards. However, I recently discovered that there are many inexpens
  9. Looking at wasps preserved in Amber under electron microscopes confirms they had structural color 99 million years ago. Flies and beetles too. https://phys.org/news/2020-06-amber-fossils-true-million-year-old-insects.html
  10. I am always happy to find any fossil, but finding some colorful ones is always a special treat. I don't live in Canada with amazing Ammolite Ammonites, but I have collected some pretty cool colorful things myself. What are your most colorful fossils? Show me! A Rainbow of Ram's Horns -Illymatogyra arietina - Texas Cretaceous Colorful Crinoids - Texas Pennsylvanian Some more Illymatogyras that are just colorful in and of themselves: Ammonite from England: Ammonite from North Sulfur River, TX
  11. I got this petrified wood. But couldn't know what kind of wood it was. Any comment?
  12. Does anyone know of deposits other than the LeGrand crinoids where each species is preserved in a different characteristic color, all on the same slab? We have this kind of thing in the brachiopods and trilobites of the Decorah Formation (Late Ordovician) here in Missouri, which is what got me thinking about it. But I've never seen a report summarizing other cases of this phenomenon, and as I think about it I'm not sure I can name any others. Can you? Brachiopod photo info: A= Zygospira B= Rafinesquina C= Doleroides 1 = Isotelus, rusty brown 2 = ?Achatella, light gray
  13. New technique to measure melanin type applied to 3MYO mouse fossil. Allows reconstruction of coloration. https://m.phys.org/news/2019-05-reddish-ancient-fossil.html
  14. Why are trilobites brown from Russia and black from other countries? What's the difference of the mineral composition between a brown trilobite and a black one? Both the trilobite fossil and the matrix are stones, why are their colors so different?
  15. I'm sure y'all are aware that fossil shark teeth come in many colors, from Bone Valley White to Jet Black. I've also heard of weirdly colored ones, including some that had purplish roots! So what is your weirdest colored tooth? For me, it's a small one that has a pitch black root and a sky blue blade (no related image, though).
  16. Hi all, I wanted to start a thread for people to share their favorite fossils with amazing coloration. To kick it off here is one of my favorite shark teeth (a hemipristis from BV in Florida, miocene age). It is near max size for the species, just under 2" on the slant.
  17. WhodamanHD

    Some Dinosaurs laid blue eggs

    And I'm not talking about that blue little dinosaur that hangs out in your backyard... Dinosaurs Laid Blue Eggs—And That's a Big Deal - National Geographic LINK
  18. Hello, I am going fossil hunting in a stream called Big Brook in NJ. It's mostly a stream ankle high. So I was wondering where should I dig and sift to find the most fossils? Should I dig deep? Should I go where all the rocks are? Should I dig on land? Thanks.
  19. I ordered a couple of caliper stands and one is for this little beauty! This is Hoploscaphites nicoletti. One of the best I have. I now wish I could find a caliper stand that is black in color. I think the shiny brass takes away from the specimen? Also, I just wish you could see the real color this has. The picture doesn't do it justice. RB
  20. KCMOfossil

    Keeping the wet look

    Sometimes a fossil shows more of its detail when wet than when dry. The photos below show what I mean. What is a good way to treat the fossil (I mean with oil etc.) so that it will keep the more attractive wet look? The first photo is dry, the second is wet. The pictures were taken with the same lighting and camera settings. Russ
  21. I've always wondered why many specimens are extremely colorful. Many seem to be unrivaled in terms of color with other fossils. Any thoughts?
  22. I looks real, but you can't start a camp fire with this. The species is unknown, but I like to imagine perfect pigmentary replacement.
  23. SharkGirl

    mostly fozzz 045

    From the album: 2012/13 Discoveries

    My fav Mako. frm a crk
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