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  1. Brian James Maguire

    Another for the collection

    Guys is this a bivalve stuck in the back? Im guessing the main one is a straight shelled nautiloid
  2. Brian James Maguire

    Circle object

    What could this be guys, not finished polishing but very curious
  3. Brian James Maguire

    No clue what this is

    Hope somebody can shed some light on this one
  4. Brian James Maguire

    Another mystery

    Cross section of a nautiloid maybe? Its odd that there were no more sections though When polishing out
  5. Jessicapine02

    Trace Fossil?

    I have identified the rock as Limestone from the CSX Wauhatchie Yard in Chattanooga, Tennessee. There appears to be some sort of pattern or striations on the outside of the rock. My rock community has deemed it as a fossil of some sort!
  6. Brian James Maguire

    Coiled nautiloid maybe?

    This one is a bit confusing
  7. This piece is supposedly a horseshoe crab ( Mesolimulus walchii) from the Solnhofen limestone of Germany. It is Jurassic and the description says there has only been mild color enhancement. Is this fossil real? Any fabrication? Thanks for the answers!
  8. Brian James Maguire

    Small sample of todays finds for id

    Some really great finds today, hope you guys can help, cant wait to prep them out
  9. Average_Geo_Undegrad

    Crinoid Head? and ammonite in the same rock?

    Hello, I found this rock in an ephemeral stream bed with what I think is an ammonite and crinoid head in the same rock. I'm somewhat familiar with the local geology and fossils but not 100% sure. It was found in Columbia MO in what should be part of the Osagean series of the Mississippian. Most common rocks in the area are limestone, chert, and dolostone; crinoids are extremely common. I'm a lot less confident on what I think is a mold of a crinoid head (second fossil pictured). I just hope it's not a chert nodule. Anyways I would love to hear other opinions to confirm this. Thanks!!!!
  10. Brian James Maguire

    Whats this guys?

    Another diffrent looking thing but is it another nautiloid?
  11. Brian James Maguire

    Another cephalopod ?

    What do you think guys?
  12. Brian James Maguire

    Orthocone nautiloid

    From the album: Lower Carboniferous fossils of Ireland

    A polished out orthoconic nautiloid from the malahide formation dublin ireland
  13. Brian James Maguire

    Bryozoan or shell

    What do you think it is guys
  14. Hello, I collected these two fossils on Japen Island, in Cenderwasih Bay on the north coast of West Papua, New Guinea. The site is Miocene carbonate rocks, just above sea level. First and second images are two sides of specimen 1, with a one Euro coin for scale. Third image is a close up of the side shown in image two. Fourth image is specimen 2, again with the one Euro coin and the fifth image is a close up of that. Specimen 1 looks like Syringopora coral to me. Really no good idea about specimen 2; bryozoa? Any help with ID is very much appreciated. Thanks!
  15. Brian James Maguire

    Shell ID

    Another shell for the experts,
  16. Brian James Maguire

    Unsure what this is

    Hi guys , i have come across this shape in several of my fossils , is it crinoid or some sort of shell
  17. Brian James Maguire

    Fan like structure

    Hi guys any idea what this fan like structure is
  18. Brian James Maguire

    Whats this little fella

    Hi guys another one for the experts
  19. Brian James Maguire

    Exciting looking find

    Hi guys , i never seen anything like this before, im excited to get some feedback
  20. Brian James Maguire

    Is this a gonatite?

    Hi guys, just wondering is this a gonatite
  21. Brian James Maguire

    What type of brachiopod is this

    Hi guys , trying to find out what type of brachiopod this is, thanks.
  22. Brian James Maguire

    Whats this little guy

    Hi guys, another segmented creature looking for a name
  23. Brian James Maguire

    Another something or nothing guys

    Hi guys another one for the experts! What is your thoughts, IMG_9790.mov
  24. A few months ago I started to prepare this specimen which we collected five or so years ago near Wee Jasper, NSW. Specimens from this site must be acid prepared since they are encased in a hard limestone, making mechanical preparation impossible. Included will be my method for preparing this specimen, as well as my mistakes! Placoderm fossils from this site are typically found as black cross sections, just like the pictured specimen. Bone can be distinguished from other fossils in most cases due to the bumpy texture present on the exterior surface. To consolidate the specimen before working on it, I applied very dilute paraloid-b72 to the bone. At this stage, a dilute solution is best to ensure the paraloid can penetrate as deep into the bone as possible. If the ratio of paraloid to acetone is too high, the solution will be too viscous and the paraloid will only coat the surface of the bone. Next, I air scribed the bulk of the matrix I wanted to remove in order to greatly speed up the process. Here is the specimen after a couple of baths in 8% acetic acid (double strength store bought vinegar): Between acid baths, I let the specimen soak in water for a couple of days to remove any residual vinegar and prevent the build up of crystals which may form inside the bone and damage it once it dries out. Once dry, I applied more of the dilute paraloid to the freshly exposed bone with an eye dropper, making sure the bone was soaked and well consolidated. A photo showing matrix carefully removed with an air scribe between acid baths: I think it was around this point I made a very annoying and easily preventable mistake - I broke the fossil while moving it. It was easy to glue the pieces back on with a stronger, more viscous solution of 20% paraloid but now there are some ugly cracks through the specimen in places. I opted for paraloid instead of superglue because it is easily removable, if I'm not satisfied with my reattachment I just have to apply some acetone and the glue will dissolve again. I broke a couple of other pieces off too which is incredibly annoying, fragile fossils and I don't tend to mix well! Here are some photos of the finished specimen: Note the cracks on the right side of the specimen in this photo. I can't remember how I broke so much off at one time but it is incredibly annoying and so easily avoidable! The fracture towards the left side of the specimen here is natural, it may have been filled in by a band of silica which makes up much of the remaining rock. The crack in this photo was a natural fracture, but it looks like a larger chunk of bone fell off when I was gluing it back together before I started the acid preparation. This photo was taken at almost same angle as the "before" photo below it for reference! Here it is easy to see where the blueish limestone dissolved away, leaving only the bone and the bands of silica which make a convenient stand and support for the fossil. Thank you for reading:)
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