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Found 411 results

  1. Trip to Big Bay

    The weather is exceptional in southern Ontario, these days. 25 degrees C! That’s 77 degrees Fahrenheit to my US friends and for here in November it is exceptional! We decided it was a great day to go to Big Bay which is situated on Georgian Bay between the Owen Sound and Colpoys Bay a beautiful place down a gravel road; it can be busy in the summer but we knew today it would be quiet. The trip was purposeful because I know it is just full of water washed fossils and I wanted to post pictures of what is there. I wanted to show you all how prolific the Silurian Ocean was. I also included a couple of photos of the beach it’s self. Hope you all enjoy.
  2. Hey Folks, I specialize in the Middle Silurian Waldron Shale formation. However, I have many other North American Paleozoic invertebrates from many classic sites. I would be happy to exchange this material for any good Waldron Shale fossils, prepared or unprepared. I'm located in Ohio. Drop me a line and let me know what you have and what taxa you may be interested in. Look forward to hearing from you. Note: If you would like to exchange Waldron material you have for Waldron fossils I have...we can do that. For instance, if you have unprepared Waldron fossils I can exchange prepared material from my collection for your unprepared fossils.
  3. Maine Fossil Trip

    I am the president of the Oxford County Mineral and Gem Association, but I am at least as interested in fossils as minerals. Maine is of course not known for fossils but there are some in the north. After living here nearly eight years, my wife and I finally ventured in that direction to see what we could find. The attached file was prepared for the OCM&GA newsletter. Hope you enjoy. Tom Hoffelder A FALL FOSSIL TRIP TO THE RIP.pdf
  4. ID Help

    Hi, I'm not a collector of fossils. I found this about 20 years ago. It was from the Niagara escarpment at Inglis Falls just outside of Owen Sound Ontario Canada. According Wikipedia the escarpment's caprock is dolomitic limestone and is composed of an outcrop belt of the Lockport Formation of Silurian age. I thought it might be a winged insect but if it is Silurian or Devonian maybe a water based creature. I'm not sure if it is a wing on top or part of something else. There appear to be a few small and very small mollusc shells embedded in the rock although they aren't clear in the photo. In the side strata there is quartz as well as other layers including a dark/black layer. Whatever it is appears to be missing the head. There does appear to be another leg on the rock top as well. Thanks for you kind assistance. Best Regards, David
  5. So i might soon be heading to a silurian site. It has shells trilos crinoid stems. But i would really want to find a complete crinoid. Any tips how? Split rocks open? Look in areas where theres alot of crinoid stems?
  6. Tides Played Important Role in Evolution

    Dear editorial staff, I’m not sure if this is permissible in this format. If it is can you edit the first page to stand upright? I am still an amateur! What I want to say is: This is so exciting to me because the fossils I find around here all indicate to me trauma, from tidal events! These events most certainly directed evolutionary change and development, including increasing the oxygen levels in the water much the same as filters do so in an aquarium. Where I live feels like an Paleozoic, evolutionary test tube. ARTICLE LINK
  7. Here are 2 more Halysites 'chain coral' that I found in the Silurian of Wisconsin. The rocks were soaked in diluted muriatic acid for several hours, to partially dissolve the matrix and reveal the chain corals.
  8. Wren's next - silurian Wenlock

    I've been cleaning away at this by hand, I can't get much further as the rest of the matrix is very hard. What have I been uncovering here? I thought brachiopod shell when I just saw the edge, now I have no idea. Looking at other pics of Wenlock fossil I couldn't spot anything similar. Can anyone enlighten me?
  9. Via Sci-News: Osteostraci, the jawless sister group to all jawed vertebrates, had adaptations for passive control of water flow around the body, according to new research led by the University of Bristol. http://www.sci-news.com/paleontology/ecologically-diversified-osteostraci-08916.html Full original paper-no paywall: Computational Fluid Dynamics Suggests Ecological Diversification among Stem-Gnathostomes https://www.cell.com/current-biology/fulltext/S0960-9822(20)31362-2 Generalized translation: Armored fish developed streamlining and passivecontrol surfaces adapted for efficiency while swimming, as in form over function. Also the big armored heads likely did not have much impact on the later development of jaws and related structures. Or, even simpler, these guys were really efficient at moving through the water even with big, heavy heads and the more modern mouth that evolved later did not necessarily result in greater numbers of different shapes among species.
  10. Back to the Ohio Valley

    Hi Everyone, I took a 2 week trip to the Ohio Valley, arriving back in New York about a week ago. It was primarily a family visit since many of my relatives now reside in the Elizabethtown, KY area. However, the Ohio Valley, as some of you know, is very rich in Paleozoic fossils and I just had to make a few stops on my way there and back as well as between family engagements. I will try to share enough to give you all a gist of it: It was a long day's drive from the northern suburbs of New York City to Richmond, Indiana where I spent the first night. The next day I was headed down State Road 101 to Garr Hill, to collect in the Upper Ordovician Liberty Formation. It was my first time at the site and everything I found was collected from loose rocks at or near the base of the outcrop. A couple of pictures:
  11. From the album Nautiloid’s Eurypterids and other Silurian fossils

    Unknown sp. of brachiopod on a partial Eurypterus remipes prosoma Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Herkimer County, New York Collected 8/22/20
  12. Found this shell in bjärsjölagård

    Found this shell in Bjärsjölagård Sweden, Silurian aged. Anybody know the species?
  13. I found this section of colonial coral in the Silurian of southern Indiana. I believe it is Arachnophyllum. Specimen is approxately 9x5x3 inches. Photos views are oblique, top & side cross-section showing laminae.
  14. Hi everyone - My wife and I were thinking about going eurypterid hunting this weekend or next if the weather cooperates. I was wondering if anyone is willing to share any public sites found around the Buffalo area (I know the Williamsville member is exposed in many places around Buffalo). Of course, we would not share this info anyone. Also, if anyone will be out at a site - we could even meet you there. I have a geology background but know very little about this area. Thanks! Pete
  15. Dolichopterus walking leg

    From the album Nautiloid’s Eurypterids and other Silurian fossils

    Dolichopterus macrocheirus partial walking leg Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Collected 8/22/20
  16. Plate of Eurypterus and Pterygotus parts

    From the album Nautiloid’s Eurypterids and other Silurian fossils

    Assorted Eurypterus remipes and Pterygotus sp. parts Upper Silurian Bertie Group Fiddlers Green Formation Phelps member collected 8/22/20
  17. Silurian mollusk

    What type of mollusk is this? Oyster? Bivalve?Internal mold. Silurian Thanks for any help.
  18. I found these 2 specimens (molds unprepped) of the trilobite Calymene celebra, the official Wisconsin state fossil, in the Silurian of Wisconsin.
  19. I found this rock containing a Halysites 'chain coral' in the Silurian of Wisconsin. I soaked it in diluted muriatic acid for a few hours to partially dissolve the matrix and reveal the silicified coral fossil. Photos are before and after acid treatment.
  20. Greetings forum members! I was looking through the last rocks from my latest fossil hunt and I found this interesting piece. Its a partial Pterygotid body segment! I had broken it and I thought I had thrown it back but apparently I kept like 80% of it. I glued it back together as best I could last night and was looking more closely when I found something interesting. I’m not completely sure but I have a hunch that the one end of this fossil might have predation marks from a larger Pterygotid. Could this be true or did it just break weird when it was molted? I was wondering if anybody on the forum could help me out with this. Thanks for looking! Owen
  21. Hello all! As I’ve been taking a closer look at some of the rocks from my previous fossil hunt on August 22, I have been finding some pretty cool fossils that I overlooked at first. I am going to show some of the more interesting ones on this post. Enjoy! ~ Owen
  22. Juvenile Pterygotid mouth part

    From the album Nautiloid’s Eurypterids and other Silurian fossils

    A mouth part from a juvenile Pterygotid Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Herkimer County, New York Collected 8/22/20

    © Owen Yonkin 2020

  23. Possible partial reproductive appendage

    From the album Nautiloid’s Eurypterids and other Silurian fossils

    Partial Eurypterus remipes reproductive appendage Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Herkimer County, New York Collected 8/22/20

    © Owen Yonkin 2020

  24. Partial eurypterid with feeding parts

    From the album Nautiloid’s Eurypterids and other Silurian fossils

    Partial Eurypterus remipes with three body segments, a partial prosoma, the beginnings of both swimming legs, and the backs of the feeding parts. Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Herkimer County, New York Collected 8/22/20

    © Owen Yonkin 2020

  25. Partially covered Eurypterid cephalon

    From the album Nautiloid’s Eurypterids and other Silurian fossils

    Eurypterus remipes cephalon Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Herkimer County, New York Collected 8/22/20

    © Owen Yonkin 2020