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  1. Mastic

    Ordovician Limestone Structure

    I found this plate of Ordovician limestone in Prince Edward County, Ontario. It’s a relatively unremarkable specimen, bits of crinoid stems and brachiopod shells are scattered throughout, but it contains a prominent raised convex bar seen on the upper left of the specimen in the first image. My best guess is that it’s an ichnofacies of some kind, a burrow or trail left by something like a trilobite. I’ve included some close ups of the bar, there are small bits of shell where it comes to an end. Any help identifying it is greatly appreciated!
  2. Tetradium

    Cyrtoceras sp.

    From the album: Minnesota Ordovician Decorah Cephalopods

    Top view - Rare in Decorah Formation Twin Cities. Small size, the muddy limestone made it hard to tell what species it is.
  3. sarahbbgun

    Are these structures Stromatolites?

    I’ve been clearing out invasive vines from my neighborhood park/green space and came across these structures absolutely covered in fortunes spindle and green briar. I could see a little part poking out and wow I just had to uncover them. Could they be stromatolites? Or just layered ole weathered limestone boulders? My Google searches of stromatolites did turn up a few that resembled these structures. But only a few:) any thoughts are greatly welcomed!
  4. CrustaceousBaki

    Northern IL Mystery fossil

    Found in Kane County, IL. Never seen anything like it before around here, found buried in dirt near the fox river with few other pieces that had broken off.
  5. The_bro87

    Upstate NY Trilobites

    Hi! My friends and I are part of our Universities geology club and we were hoping to plan a spring break day trip to look for some trilobites. We go to Binghamton University in the southern Tier. I've been to the site in Tully NY behind the hotel and gas station and found some great partials (especially of greenops), but this time around we were hoping to find some more complete fossils. We've heard that there are some good places to look in Madison County, and also in Little Falls, but were hoping for advice on the best spots to look that are also public property to collect on. Sites closer t
  6. This specimen measures about 22.5cm in length and 14cm in width. I found it about 9 months ago on the riverbank along Joshua’s Creek in Oakville, near the tip of the Georgian Bay Formation that meets Lake Ontario. Been really busy the past few months, so haven’t had time to post it until now. Can anyone identify what Fossilized Bivalve species are present on the Rock?
  7. T. Roe

    What is it?

    okla fossil_files Ordovicican, Oklahoma
  8. I found this in Ohio Brush Creek thinking it was horn coral. Its not. Any ideas? Part of a syphuncle maybe?
  9. I recently collected from the Drakes formation on the west side of the Jessamine dome. I've been dissolving rocks, rinsing and then baking for about ten minutes in an old toaster oven. This is my outdoor laboratory. Here are some fossils. Thanks for looking.
  10. Hello everyone! Today I acquired a specimen that is of a rarity that's nearly unparalleled. The specimen in question is the cuticle of a Eurypterid from the famous, classic, and closed Ordovician locality at Swatara Gap. I believe it is undescribed and I can tell its a eurypterid for sure by the scaling pattern on the cuticle. Eurypterids aren't unheard of at Swatara Gap but I have never seen a specimen or even known about a specimen other then the one I have. They are extremely rare and were probably over looked by collectors due to not knowing what they were. I acquired the eury
  11. MarcusFossils

    Canada/Quebec/Ordovician/Upper Ordovician

    From the album: My Collection

  12. MarcusFossils

    Canada/Quebec/Ordovician/Upper Ordovician

    From the album: My Collection

  13. MarcusFossils

    Bufoceraurus bispinosus

    One of the rarer trilobites from the classic Lake Simcoe quarries. Synonymous with Ceraurus bispinosus. Evolutionary Patterns of Trilobites Across the End Ordovician Mass Extinction by Curtis R. Congreve B.S., University of Rochester, 2006 M.S., University of Kansas, 2008 ... https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjEjaC5v-L1AhWekokEHXkVB_UQFnoECAcQAQ&url=https%3A%2F%2Fkuscholarworks.ku.edu%2Fbitstream%2F1808%2F12322%2F1%2FCongreve_ku_0099D_12715_DATA_1.pdf&usg=AOvVaw13TH_kPABFC5TcQqelHFh3&cshid=1643855913325917
  14. I found the following rock and several other highly worn pieces in a creek bed that look to contain fossils of sea worms, etc., Fossils were found southeast of Fayetteville, Arkansas (long 35.68815 x lat -93.74751). Geologic timing - Ordovician? Rock is quite dense, and what was originally shale, is now metamorphic. The "segments", or wider features, measure the same thickness between seams, so i'm guessing this to be from a once living organism. Would love any ideas on this one!
  15. How much better does it get when you can have FUN and help others experience the JOY of FOSSIL HUNTING, especially the children! These hunts were both booked through Eagle Bluff Environmental Learning Center. And I have a BIG THANK YOU to @minnbuckeye because MIKE made both of these hunts very special. A while back Mike stopped and was so generous and gave me three geodes he had found - he knows I love anything that sparkles. :-) After he left, I thought how selfish of me to keep them for myself and decided that the youngest on the hunt would be able to break one. WOW! Seeing the smiles on t
  16. Hi all. I posted about a week ago in this forum with what I thought was a Maclurites fossil I found in the Galena Group in Illinois: http://www.thefossilforum.com/index.php?/topic/116602-ordovician-maclurites/. Others agreed with me. There are two parts of this fossil that I wonder about. One is fairly large and may be a piece where the outer shell of the Maclurites broke to reveal an inner layer. It may also be a second specimen that was fossilized along with the Maclurites, replacing part of it. (I bet there's a term for that, but I don't know it!) This part of the specimen stands out by vir
  17. This is my first post of a Fossil Trip I took. I'm also fairly new to identifying fossils and researching the geological makeup of various sites. The trip was fun and writing about it really helped me organize my finds. (Sorry to use a sharpened pencil to indicate size. I want to get one of those cool metallic-looking cubes I see on TFF. If somebody can tell me where to get one, I'd be very grateful.) I recently went on vacation about 8 miles East of Galena, Illinois. I had checked with a few local and regional rock and fossils groups to see whether anybody knew of collecting sites
  18. Thunderchunky

    Ordovician coral from Tennessee

    I have these few pieces of coral I need help identifying. They were all found in middle Tennessee. They were all found in the same place and their formation is part of the stones river group. I also have this weird little guy from Tennessee that my dad found on a roof.
  19. trimerus

    Anomalocaris Morocco ?

    Can it be a part of an anomalocaris? Ordovician, Fezouata Formation. Morocco Fossil Length 17 cm (7 inches)
  20. patrick plesiosaurus

    Unknown graptolites

    I found these Graptolites in the Ashgill beds of fine slaty mudstone, at ash ghyll cumbria (You will have no idea where this is) I followed my book from 1969 explaining where to find graptolites. It says these are either monograptus argentus or monograptus fimbriatus ??? Does anybody know what type they are.
  21. Dimitar

    Ordovician, circular

    Hello guys! I would like to hear your oppinion on these circles. I was suspecting for amonites, but it could be just a Bryozoa. #1 #2 #3 #4 #5 #6 #7 #8 #9
  22. Dimitar

    Bryozoan shells

    Hello guys! These are the specimen from Ile Bizard. This seems to be some kind of Bryzoan, forming a shell structure. #1 1.1 1.2 1.3 1.4 1.5
  23. Dimitar

    Flat fish from Ordovician

    Hello guys! Please help to identify if this is a "fish" (it could be one of the very first ) . It is most likely Ordovician. Found in shale block - mud stone Between Montreal and Laval. This is the block: And this is a closer view:
  24. elcoincoin

    latest trilo preps

    Hi there, Latest preps : trilobites from Brittany ordovician. The Neseuretus was collected in décember, kinda last hunts we could manage before more lockdown, i didnt think it would turn out that nice. The second one, was waiting on the shelf for quite a while, despite it only needed a small preparation and is a positive and negative Eodalmanitina sp.
  25. sTamprockcoin

    Ordovican Unknowns

    Since Saturday was my only day off (Yes, the hottest real-feel <temp +humidity> day of the year so far!) I went fossil/mineral collecting, yard-sailing, thrift shopping, i.e. out for the day. I came across a new to me spot in a borrow pit in Sinking Valley outside of Altoona PA. I believe that this is Ordovican, Coburn Formation. This limey shale falls apart in your hands. I'd really like to know what the curved pointy thing is (both sides shown in 1st pic). Thanks for any help.
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