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  1. April 10, 2021 1-4 pm Spring Valley, Minnesota Eagle Bluff Environmental Education Center organized hunt Led by Bev Sandlin, Bluffcountryfossils.net Whispering Winds, Spring Valley, MN Galena Formation Ordovician fossils What FUN!!! And what Great Finds! This hunt was organized by Eagle Bluff Environmental Education Center in Lanesboro, MN. I am doing hunts for them every 2nd Saturday of the month through this season and any private hunts they book as well. We had about 20 participants and it was a whirlwind hunt they all were enjoying as I left them still hunti
  2. angeb20

    ID help please...

    Found this on our small kettle lake shore in southern Minnesota. We occasionally find sea life fossils here, but this is a first for us. Can someone identify? Thank you.
  3. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    Here is the third picture of unknown bryozoan species.
  4. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    More close up of unknown Decorah formation bryozoan. You can see the much thicker wall clusters together.
  5. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    Close up of the unknown species showing varying walls thicknesses
  6. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    Batostoma species from Mifflin portion of Platteville Formation. Since there hadn't been any official researches into platteville bryozoan, I would assume this to be a early forerunner of Batostoma fertile as it looks very similar to it but on average smaller. One rock have a different species running parallel but camera couldn't get more details.
  7. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    Unnamed species. I keep getting in over my head with all the vocabulary so most likely not new. I only found this species this year in a new Decorah dig site location. I would had almost tossed it aside if not for the first piece I found which is much longer than the usual rugose decorah twin cities Ordovician bryozoans. On closer inspects it is so different from my Batostoma species. Rarely branching which is very unusual for a rugose bryozoan, very variable wall thickness as seen as under digital microscope. Only found in this one location.
  8. Tetradium


    From the album: Ichnofossils of Platteville to Decorah Formation Twin Cities

    One of the largest most complete Rauffella palmipes feeder burrow fill I have ever found. I hadn't heard of any other trace fossils yet that comes close to this weird one. The invertebrate animal that leaves them makes overlapping spoon shaped burrows with one entry hole.
  9. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    Stictoporella frondifera. Very localized abundant in lower Decorah formation Minnesota, Ordovician, Twin Cities.
  10. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    "Batostoma minnesotense" Decorah shale Twin Cities Ordovician. I couldn't tell any difference under digital microscope or by eye examination so any similar species are lumped by me under it. Very abundant in Decorah Shale. Only difference between this and Batostoma fertile is by compare of side by side specimens. Batostoma fertile have larger zoarium that is noticeable with the naked eye.
  11. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    The best I could do with digital microscope of close up of Batostoma fertile specimen.
  12. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    Compare of two Batostoma species from the same Decorah formation. They both overlaps in shape, size, and are among the largest branching bryozoan in Decorah Formation. The left three are Batostoma fertile and the right 3 are Batostoma minnesotense.
  13. Tetradium


    From the album: Bryozoan of Minnesota Ordovician

    Batostoma fragile Decorah Shale Ordovician Twin Cities Minnesota. When comparing all bryozoan fossils from Ordovician this one stands out as having the largest zoarium. (fossil terms for the pores). Its also the largest branching bryozoan I had found in terms of masses. One thing I have noticed with this is compare to "Batostoma minnesotense" It tend to be ,more lumpy and more flexible into forms, even at times mistook for Prasopora conoidea if not for its larger zoariums.
  14. MarcoSr


    Two highly polished, end cut Stromatolite agate achats from the Mátra mountains, Gyöngyöstarján, Hungary from the Miocene, 20 million years ago that I recently purchased. These are the first Stromatolite fossils that I’ve added to my fossil collection. I’m posting a few pictures to show the incredible colors in these pieces. End Cut (1) ( 543grams 103mm by 102mm by 35mm) End Cut 2 (166grams 75mm by 45mm by 45mm)
  15. Hi everyone, I just wanted to let you know that I spoke with the St. Paul Parks and Rec office today, and the Lilydale Regional Park has been completely closed off to fossil hunting, and fossil hunting permits "for the foreseeable future..." It isn't COVID related, but apparently the area has become increasingly unstable and has been closed off due to safety concerns. Unfortunately, one of the best places in MN has been closed and we all should help one another out to find new locations close to the cities to fossil hunt. This is truly some sad news...
  16. Tetradium


    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    This is my first digital microscope picture submitted to this website. I tried it on bryozoan but couldn't see any significant differences. Part of Amphilichas cephalon close up. It was suitable because of its tiny size but was too big to get a full screen. Note the bumps on the eyes.
  17. Tetradium


    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Ceraurid hypostome. Platteville Formation (SW corner specimen) and rest are Decorah Formation. For a long time I thought it was little rolled up trilobites, that's how much the hypostome look like. Tiny .5 cm for Decorah ones and .6 cm for platteville ones. Decorah ones seem to be uncommon to common and very easily overlooked because of its tiny size. Heck I wonder how many had I overlooked over 5 years.
  18. Tetradium


    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Amphilichas sp. cephalon. This is pretty small - .7 cm across. Platteville Formation Twin Cities Minnesota. Rare. Its cephalon is very distinct, having 5 well definite lobes.
  19. Tetradium


    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Sceptaspis lincolnensis cephalon with damage to one eye and part of head. 1.7 cm across. Platteville Formation Twin Cities. Rare at least to me.
  20. Tetradium


    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Unidentified Ceraurid free cheek plus different unidentified cephalon piece. Rare - this is the only one I had found so far - turn out the "lumpy" part is one of its eyes. Platteville Formation.
  21. Tetradium


    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Calyptaulax plattevillensis (thank Kane for positive Id) uncleansed piece. Cephalon and thorax is visible in picture. Lower Platteville Formation
  22. Tetradium


    From the album: Corals of Decorah Minnesota

    Platteville formation Lambeophyllum profundum. Outer laver are gone. Uncommon to rare.
  23. For those of you that hunt rivers and creeks in the Midwest how often do you find horse remains? These three humeri were all found within a 2-mile stretch of a river within about a two year period - along with many other random tarsals, a femur, multiple tibia, and several teeth...
  24. I am confused about how to id Isotelus species as they all looks alike. I know I rex is out of the range for Ordovician Platteville/Decorah/Galena Formation. #1 is the most complete (minus head) from Galena formation in southern Minnesota. Its also the only Galena one I am showing right now as other still need cleaning. #2 The largest pygidium from Platteville Formation. Not the most complete I have but is pretty wide. #3 I am disappointed with the quality of pics but just showing here. Pygidium of smaller Isotelus species from Platteville with the farth
  25. dbrake40

    Partial Tibia ID

    Found on river gravel bar in Sothern Minnesota. I know its a partial tibia - any ideas on species? Sus maybe? Sediments in the area range from cretaceous to holocoen with a good amount of Wisconsin lobe glacial till. Previously we have found bison, mammoth, and ancient horse...
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