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  1. Fissiletag

    Minnesota fossils

    I found a couple of fossils this summer in Rochester Minnesota at Quarry Hill nature center. I'm wondering if anyone regonises some of them. They are all Ordovician in age. 1. Unknown 2. Trilobite? 3. Trilobite? 4. Trilobite for sure. Anyone know the genus or family 5. Trilobite? 6. Shell or something else?
  2. melis


  3. minnbuckeye


    Locally, graptolites are very common in the Maquoketa/ Ordovician rock. They present themselves as 2 dimensional creatures on certain bedding planes. Below the Maquoketa is our Galena. It has graptolites but uncommon. Again, they present themselves as 2 dimensional. The "unknown" specimen from the Galena, presented today, is obviously 3 dimensional and I venture a guess that it is a Graptolite. But I thought I would seek opinions in that I have seen thousands of local graptolites but never one that is 3 dimensional. Could it be something else??
  4. Bison bison. Wisconsin glaciation. Southern Minnesota, Brown County. Science Museum of Minnesota. Found in a riverbed in September of 2020 on a joint citizen scientist and Science Museum outing. I found this femur by noticing the femoral head sticking out of the river bottom. External Post:
  5. dbrake40

    Mystery Fossil Need ID

    This ‘fossil’ was found on a river gravel bar in Southern Minnesota. Sedimentary layers in the area include Wisconsin lobe glacial till and cretaceous mudstone/sandstone. The centre of this specimen seems to be just sedimentary material that is slightly harder than the surrounding material filling the core. The outer shell seems to be rock. I am totally stumped. eems to be rock. I am totally stumped.
  6. brky1001

    Petrified Wood Identification

    I located this piece of what I think might be petrified wood when I was landscaping in my yard. I am located in central Minnesota and the piece was above ground. Extremely heavy, 1ft tall or .305 meters. I appreciate any sight, as I am not super familiar in this topic. Thank you. images in order: front back left side right side top bottom
  7. Hey there everyone! I haven't been on in some time but I've just started unpacking my stuff from a move and I came across this fossil that I found in the fall of last year. I found it in an eroding gravel cliff that I frequently find Coleraine formation deposits in. This fossil is one of the handful that I haven't been able to identify. Whatever it is, it's one of the larger fossil/casts that I've found. Any help would be appreciated!
  8. Irongiant97

    Fossil bone?

    Found this in the Coleraine formation of northern Minnesota, it appears to be bone, possibly a part of an arm or leg, any guesses to what it may be? (I’ve already contacted a paleontologist but I thought I’d ask here, too. Also any tips of removing iron off of fossils? Many of the fossils here are within iron stones and i don’t know how to safely remove most of it.)
  9. Irongiant97

    Fossil bone?

    So I already made a post about this but I’ve taken a series of much better pictures and a video to show it off better. I’m certain this a humerus, elbow joint, of something, definitely from the Cretaceous. It was in a bit of ironstone matrix but I managed to remove most of it, however, it is very fragile and fragmented and I hope to have it looked over by a lab. IMG_6660.MOV
  10. connorology

    Another Unknown Trilobite ID Request

    Good Afternoon, This specimen was left to me by my late grandfather. I do not know where it was obtained, though he lived in Minneapolis so it may have been from a nearby state. It appears to be a real fossil (I don't know what anyone would make a fake one that small) but I suppose I really don't know for sure. Any suggestions are appreciated. Thanks, Connor
  11. dbrake40

    Mystery Bone - Pleistocene?

    Mystery bone fragment. Partially mineralized. Found on a riverbank in southern Minnesota. Deposits on the river are mostly Pleistocene to modern ( with a couple Cretaceous band cut through). My first thought was a very old very tumbled calcaneus (horse or bison size). But the depression, pointed out in red circle, does not seem to match either of those. I know its very worn but thought I'd give it a shot here.
  12. Irongiant97

    Donut shaped fossil???

    found this while at my usual spot, northern Minnesota, Coleraine formation idk what it is, I’m afraid to clean it off because it’s somewhat fragile, but it looks donut shaped but with harder edges, so like a big fish vertebrae, which I did actually find a smaller one in the same hunt.
  13. minnbuckeye

    New Gastropod for Me

    I stumbled onto this cute tiny gastropod from the Galena/Ordovician in Minnesota but am having difficulty with its identification. Strophostylus textiles is listed as a possiblity in Minnesota Fossils and Fossiliferous Rocks by Robert Sloan. What do you think?? Mike
  14. Hey everyone! I'm traveling through Minnesota to visit family members, and after a successful shark tooth hunt in Virginia and a little trilobite cast in West Virginia, I'm looking to find some more sites to get my fossil on. I've seen that there are exposures near Quarry Hill Park and Spring Valley, but I am having trouble locating much information about whether these sites are actual quarries, or road cuts, or rock and gravel dumped in a convenient pit from a nearby landowner. Does anyone have any pointers or advice on where some decent spots may be located? I'm trave
  15. Irongiant97

    Various fossils/possible fossils

    Various fossils/possibly contain fossils. From the Coleraine formation of northern Minnesota, mostly ironstone, I think, but one is in mudstone.
  16. that_one_girl

    Identification Help Needed

    Recently found this fossil while on family vacation in South-Central Minnesota. The site is limestone and also had a lot of Brachiopods. I'm so tired of relatives joking its poo. Hoping someone can help me ID it, the internet was of no help so far.
  17. that_one_girl

    Just a rock?

    Found this while hunting for fossils in South-Central Minnesota. Most of the fossils we found were easily identified brachiopods.The shape of this rock was very different from those around it. The curve was so uniform, maybe it's just a rock. I am less than a novice at this so I really don't know. It also appears to have some plant fossils on it and between some layers. Maybe Bryozoan?? I would really appreciate some help in identifying any feature in the picture. Thank you so much! The first photo is the back, second picture is close up of the front, third picture is broken side s
  18. Irongiant97

    Fossil wood or worms or ???

    Found today at new spot in northern Minnesota, part of the cholera one formation. Not sure what it is exactly, possibly fossilized wood with worms or something.
  19. First trip of the year to Decorah Shale Formation in Ordovician Minnesota. This was one of the few fossils I found - I assumed it was a regular Large Gumdrop Bryozoan, Prasopora conoidea. Then when I got to cleaning the clay and soft shale off it looks so different. No noticeable pores and sharp angles. Here's two Large Prasopora conoidea - one smooth form and one rough and layered form on the left side for comparation. There is also a little Hormotoma fragilis gastropod on top. It doesn't even look like a trace fossil, as trace fossils are usually harder than usual shale or gathering of coar
  20. So I went to a new site nearby me where I heard there were shark teeth and while I didn't find any shark teeth I found flint(?) fossils, that, unlike my previous flint(?) fossils, which I believe were deposited by glaciers, I think these ones are native to where I found them, which is an old mine overburden pile (the rock above the ore they're mining for), my evidence for this was the presence of many iron rich rocks that was in the same pile, pictured I have what I believe is botryoidal hematite, which hematite is what they mine here. Also the fossils in these new specimens are different to
  21. I think I already know the answer here but what are your thoughts on this humerus. Found in a creek bank in southern Minnesota. 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...
  22. Does anyone have experience with the Middle Ordovician brachiopod faunas of the upper Mississippi Valley? I came across this odd fragment in rocks from a quarry in south-central Wisconsin. To my knowledge they are known in North America only from the Appalachian Basin (Tennessee, Virginia, West Virginia, Pennsylvania, Quebec, Newfoundland), not the interior basins like the Illinois basin. Has anybody else seen this critter or similar in the Platteville? As far as I am aware, the only species documented from the Platteville that looks anything like this is Megamyonia unicostata, but that h
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