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  1. Ceraurus


    From the album: Mark Bourrie trilobites

    Skeptaspis sp., preserved laterally. Ordovician (Kirkfieldian), Hastings County, Ontario, Canada
  2. Ceraurus

    Ceraurus plattinensis

    From the album: Mark Bourrie trilobites

    Enrolled Ceraurus plattinensis, Ordovician (Kirkfieldia), Hastings County, Ontario, Canada
  3. Ceraurus

    Diacnthaspis sp.

    From the album: Mark Bourrie trilobites

    Tiny, trilobite ventral, barely bigger than a pinhead, on a bryozoan. Ordovician (Kirkfieldian), Hastings County, Ontario, Canada
  4. Ceraurus

    Ceraurus globulatus and Trichopeltus

    From the album: Mark Bourrie trilobites

    Two different genus from the Ordovician (Kirkfieldian), Hastings County, Ontario, Canada
  5. Ceraurus

    Cyphoproetus wilsonae

    From the album: Mark Bourrie trilobites

    Cyphoproetus wilsonae, Ordovician (Kirkfieldian), Hastings County, Ontario, Canada
  6. Ceraurus

    Bumastoides sp.

    From the album: Mark Bourrie trilobites

    Bumastoides sp., Ordovician (Kirfieldian), Renfrew County, Ontario, Canada.
  7. Ceraurus

    Complete crinoids with Gabriceraurus

    From the album: Mark Bourrie trilobites

    Gabriceraurus ventral on a plate of complete crinoids. Ordovician (Kirkfieldian), Victoria County, Ontario, Canada
  8. From the album: Mark Bourrie trilobites

    One Gabriceraurus has a healed injury, Ordovician (Kirkfieldian), Renfrew County, Ontario Canada
  9. Nautiloid

    Paratrinucleus acervulosus

    From the album: Nautiloid’s Trilobite Collection

    This nice little bug is from the Upper Ordovician Liberty Hall Shale of Virginia. It exhibits pretty good preservation considering its size. Purchased from a good friend.

    © Owen Yonkin 2022

  10. Nautiloid

    Lemureops kilbeyi

    From the album: Nautiloid’s Trilobite Collection

    This gorgeous little bug comes from the Lower Ordovician Fillmore Formation in the Southern House Range of Utah. Definitely one of the coolest bugs in my collection! This was purchased from a good friend of mine.

    © Owen Yonkin 2022

  11. Tales From the Shale

    Alabama Graptolites

    Here are some of the fossils I acquired in a shale roadcut I was told about thanks to @prem. These are ordovician in age, and I have to say it was difficult to collect them due to the fragility of the surrounding material. Ive identified most of my finds, however there were these unusual pill like outlines I wasn't familar with.
  12. Last weekend I had the opportunity to spend a few hours collecting in a quarry in northern Illinois that exposes most of the Galena Group (Late Ordovician). There was lots of fresh rock to hunt through, and it was a good and productive trip. As usual, lots of gastropod molds were found. Hormotoma sp. Liospira sp. Sinuites sp.
  13. Denis Arcand

    Is it fossils or geological formations

    Can anyone tell me if these are actual fossils or just geological formations, although they look like fossilize plants to me, it would be very surprising to find fossilized plants from the late Ordovician period. both rocks were found in the Nicolet River Formation on the banks of the Richelieu river
  14. First, if anyone in the Toronto area is interested in going fossil hunting along Mimico or Etobicoke Creeks, I'd welcome the company! Before I get to a couple of better finds, I'm curious to know what the black fragments are below, which I often find embedded in the shale. Can someone please give me a clue about these? Some orthoconic cephalopods: The next two are the same fossil from different perspectives: Some bivalves: Bryozoans:
  15. This past weekend I had to cancel a collecting trip due to ominous weather, so I instead made an impromptu trip to northern Kentucky to do some Ordovician collecting for a couple days. I really love this area and would spend a week down there if I could. This trip I decided to focus on the Kope and Fairview formations, two of the older formations in the greater Cincinnati area. The first day was mostly driving and not much collecting due to rain. But I did briefly stop at a spot where I found a pocket of Ectenocrinus crinoids on my last trip. I checked to see if any more had weathe
  16. Hey folks. It hit 104 degrees here in Austin yesterday and I have decided to stay in and work on my recent finds in Oklahoma. I have a bunch of Bromide Formation, Simpson Group, Blackriverian (Upper Ordovician) brachiopods that need sorting out. I have Mark McKinzie's book and a few OKGS publications but was wondering if anyone can suggest a "good" reference for sorting them out? In fact this could include references on other inverts from that formation and age. Thanks in advance...
  17. Echinoderm identification help please! Polished cross-section in the Kimmswick Limestone (Late Ordovician: Katian; Missouri, USA) used as facing stone at Missouri Botanical Garden. Possibly the paracrinoid Implicaticystis (once known as Comarocystites)? Specimen is ~25 mm across.
  18. I collected this trilobite pygidium in the Galena Group (Upper Ordovician) of Illinois. I don't immediately recognize it, especially since it is just a mold. It is fairly large. My best guess is Isotelus but I was hoping one of the trilobite experts here might have a better idea. Thanks for any help.
  19. Everyone I've encountered on this site has been very helpful, so thank you. However, I'm in need of more help. For the last year I've been collecting real fossils in the field and selling some to pay for more exotic rocks. In a recent post I found that my Solnhofen shrimp is, if not totally, mostly fake. Now I'm quite suspicious of my entire purchased collection and was hoping you could help me identify fakes. The first two pictures are apparently Priscacara, Green River Formation, Eocene; the next two supposedly Asteroidea, Morocco, Ordovician; the last three supposedly Triassic, Arizona petr
  20. Fossildude19

    Juvenile Isotoleus

    From the album: Fossildude's Ordovician Finds

    Found in West Canada Creek at the KOA campground in Herkimer, NY. Ordovician. Juvenile Isotoleus sp.

    © &copy 2010 Tim Jones

  21. Nautiloid

    Enrolled Isotelus maximus

    From the album: Nautiloid’s Trilobite Collection

    From the upper ordovician “butter shale” bed of the Arnheim Formation, Mount Orab, Ohio Given to me by a fellow fossil collector

    © Owen Yonkin 2022

  22. Nautiloid

    Underside view

    From the album: Nautiloid’s Trilobite Collection

    View of the underside of the Isotelus maximus

    © Owen Yonkin 2022

  23. I managed a five hour solo hunt today prior to what will be a 12+ hour dig tomorrow. Being surrounded by frustrating Devonian material, I sometimes forget how exciting the Ordovician can be! But, as they say, "pictures or it didn't happen." First up, a weathered and bleached Ceraurus.
  24. Hello All, Super Newbie here, trying to immerse myself in fossil ID and learn more about my surrounding area. I found some interesting patterns on some rocks near me and was hoping someone could shed more light on what they could be. What I've read of the area so far tells me that the Oswego sandstone I've been hunting in can have wave patterns and trace fossils, though I've found crinoids and shell imprints before. Here are my unknowns for this area. 1. Interesting Ringed Rock! 2. Would this be considered a hash plate? - Sorry for the blu
  25. MarcusFossils

    Canada/Quebec/Ordovician/Middle Ordovician

    From the album: My Collection

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