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  1. Hollie Bird

    Purchased fish fossil

    Hello everyone I was browsing on a well known online auction site a few nights ago and spotted this fish fossil. Thinking it looked interesting with a current low bid I put in a cheeky last second bid and got it. It was listed as 'prehistoric fish fossil, Sandstone, two halves' so that's not a lot of help in identification. Looking at the preservation before and after purchase I'm thinking it is from Brazil? Potentially the santana group? Preservation isn't preticualy great, especially around the head and it looks to have partially fell apart because of this I'm
  2. Hi — I was lucky enough to collect a few dozen Mazon nodules this weekend. But I am not familiar with how to best prepare and understand this material. Is there a guide that would answer questions like these: • Do I freeze-thaw specimens where fossils are already showing? What about 3d fossil that is partially obscured by matrix? • Are fossils best viewed wet or dry? (seems like dry) • How do I know what's a blobby worm or jellyfish vs a blobby bit of matrix? • Are there categories of finds (besides obviously empty nodules) that are not worth posting for ID?
  3. After the last one (link here: fish skull ) turned out to be a nice skull, I'm wondering if anyone could ID this bit? It's very 3D and hard to photograph without image stacking so I've given three views. Phosphatic nodule, Brigantian (U. Mississippian) marine shale, Co. Durham, UK. counterpart:
  4. Davidjg44

    Info needed

    This appears to be some sort of animal in an egg shaped nodule. I don't where or when it was collected but I would appreciate any info.
  5. Chris finner

    Something or nothing

    Is this just a nodule inside another nodule ?? Looks like is wraps around its self but I can’t see any markings of any kind
  6. Greg Roy 73

    Nodule or Ichthyosaur Rib!?

    Found in lower Jurrasic, Liassic Clays at Seatown near Lyme Regis, Dorset, England. In Lower Liassic Clays, Jurassic rocks, close to Belemnite beds. Curved shape and heavy for size, made me wonder if it could be a rib fragment from Ichthysaur. Could just be limestone / Pyrite nodule, but I don't have enough expertise to know..Thanks. Greg. Staffs UK.
  7. Hi and thanks for looking at this. While looking for shark teeth in Northwestern New Mexico, I coaxed out a nodule that had half weathered out of the lower section of a sandstone ridge. It was fairly large (approx. 2ft diameter) and was crumbling apart, so I only grabbed the big piece as I thought the quartz looked pretty cool. It cracked open on the ride home and revealed what I think is a fossilized bone. It is a small bone and I'm not sure it can be identified; maybe a confirmation that it is actually a bone fossil would be great. The pictures are terrible right? This phone....
  8. I have tried looking up the difference between a concretion and nodule and can’t seem to get a clear answer. I have seen both terms used on the forum but don’t know the difference and would like a clear answer so I can know what I’m talking about. Thanks ahead of time!
  9. AgrilusHunter

    Eurypterid In Siderite Nodule

    Hi All, Here is a Eurypterid in a Pennsylvanian age siderite nodule from Indiana. I'm hoping someone can point me towards a family, maybe even genus, ID for the specimen. I know the images don't show many of the fine features but I'm hoping the overall shape is distinctive. Also, I'm just starting to wade through Eurypterid PDFs now but if anyone can recommend a good review manuscript for the group I'd be grateful. Thanks for your consideration. Here are the two halves of the nodule:
  10. Hello dear forum members, among the collection of my late uncle there was a box of coal fossils, most of which are flat crumbly pieces of plant material. I left most of these in their protective wrappings for now. among the fragments on the bottom of the box I found some nodules, I think these caught my uncles eye and where collected on the same trip as the plant fossils. (from Germany, hard coal, not lignite, thats all I know). The nodules are heavy like ore minerals (pyrite comes to mind) There is one with an interesting texture. Maybe a coprolite?? @GeschWhat?
  11. Marco90

    Pecopteris villosa

    From the album: My collection in progress

    Pecopteris villosa Brongniart 1822 Location: Mazon Creek, Illinois, USA Age: 323 - 299 Mya (Pennsylvanian, Carboniferous) Measurements: 2x12,5 cm Kingdom: Plantae Division: Polypodiophyta Class: Polypodiopsida Subclass: Marattiidae Order: Marattiales Family: Marattiaceae
  12. Ordivician19

    Is this a jellyfish? Mazon Creek, IL

    Hi! I’ve been working on opening some nodules from Mazon Creek, IL, and opened this one about an hour ago. I’ve been looking at pictures online of jellyfish and have seen some loosely defined like this nodule, though this is probably just a regular old concretion. What do you think? Thanks! P.S. In hindsight I realize that wetting this nodule down wasn’t particularly helpful lol
  13. Mahnmut

    pyritized ammonite in nodule?

    Hello together, I just bought this thing online labelled as a septarian nodule with pyrite. From Germany, no further info. It looks quite fossilish to me, maybe like an ammonite? I just cant see exactly what the pyritized "ribbons" may be. I do not have it yet, so sorry, no scale. Size is 10x8x3cm. Any ideas? Thanks, J
  14. Hello all, With the start of this month I have gotten back to doing some fossil prep. I am still very much learning but I am happy with how this one turned out. It's a Callianopsis clalamenis nodule from the Pysht formation of Washington State which I found this past January that preserves two sets of feeding and defensive claws as well as some disarticulated shell material. This prep was fun and I am excited to try another shrimp, they are a welcome break from working with very hard pyrite nodules from Yorkshire. Before prep: After about half an hour
  15. minnbuckeye

    Oddball Mazon Nodule

    My bucket of mazon nodules collected this summer have been sitting outside in the sub zero temperatures all winter. I was finally able to fetch the bucket and thaw them out recently. The nodule presented split completely different than other nodules that have opened. This one is a heptagon prism, VERY geometric, not split on a horizontal plane like I am used too . Is there a fossil present on the upper surface and have others experienced nodules opening up geometrical like this one? Thanks for looking Mike Front view Back view.
  16. Mochaccino

    Madagascar fish?

    Hello, Any idea what this might be, where from? Possibly a madagascar fish nodule? The seller just says "probably cretaceous", doesn't seem to know much else. 13cm length. Also while I'm at it, can I ask if any part seems restored or enhanced? Thanks.
  17. KompsFossilsNMinerals

    Mazon Creek Thing

    I was splitting open some Mazon Creek nodules I've had for a while about a half hour ago when this enigma popped out, I have no clue what it is. The nodule is from Pit 11.
  18. minnbuckeye

    Mazon nodule unknown

    Need a little assistance identifying this. THANKS!
  19. JoeDINO


    Picked up two large items the other day. I figure they are large ammonites but the disks toward the bottom on the cleaned up one are confusing. They would be bilateral equal except for the break in the one. The second is about 125lbs and has an dark orange/blk pattern showing thru in areas that appear to be shell. Neylandville Formation, Hunt County TX
  20. Fossildude19

    Latest acquisition - fossil capelin

    From the album: Fossildude's Purchased/Gift Fossils

    Fossil fish nodule from the Lower Pleistocene Middle Holocene (Northgrippian Stage) of South West Greenland. Mallotus villosus. Thanks to @piranha for the age correction!

    © 2018 T. Jones

  21. JoeDINO

    Something, just not sure what...

    Pic one is how it originally presented. The rest show it as it looked being uncovered. It broke into sections and many parts broke off when removed. Have all parts isolated and somewhat cleaned off. Will attach those pics soon. Anyways, I have no clue what it could be. Found in Hunt County, TX three days ago.
  22. Yoda

    Mazon Creek - unknown fern

    Perhaps one of the Mazon Creek experts could help with the ID of this Was sold to me as Mazon Creek Pecopteris Look a bit different to the usual Pecopteris that I have seen
  23. JoeDINO

    Nodule, matrix, or whatever.

    Ku2 Hunt County, TX This is about the size of a car tire. These are typically heavy in mineral deposits on their interior with some perceived chambering. I've recovered quite a few over the past year that are very similar but none I've ever come across have had the exterior features like this one. It also carries that same orange color that I'm observing in a lot of the collected items. (Collage pic is of two others examples of the coloring referenced.) I've been pointed towards septerian nodules before with a similar submission. I've read some of the research o
  24. minnbuckeye

    Mazon Creek Nodule Unknown

    A Mazon Creek nodule popped open a few days ago. At first I thought it was nothing. But in the right light, I have hope (hopefully not false hope) that this may indeed be a find. If this were my Ordovician matrix, I could envision a trilobite. Maybe it mimics a horseshoe crab!!!! During my hunt, I did get to see a horseshoe crab found by @flipper559 I will cross my fingers waiting for the experts to respond.
  25. Strange shaped Chert nodule? Or native artifact? Natural or not? Found in creek.
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