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Found 102 results

  1. Iowa Devonian Fossil (Fish Armor?)

    Help please! Last weekend I was on a club trip here in Eastern Iowa, and I found a really cool fossil. According to other club members, the layer it appeared to come from is roughly 385 million years old, possibly from the Little Cedar Formation, although we can't be sure. We believe that it is likely plating from an armored fish. A photo with a couple measurements is attached. The bumps vary in size, but are about 3 mm in diameter. I've reached my photo size limit, so I will try to add more close up photos in a little bit. What species could this be? What part of the body would it be from? Thanks! -Ben Worrell
  2. Isorthoceras sociale (Hall 1877)

    From the album Nautiloidea

    The plate measures 11x9x3cm. Elgin Member Maquoketa Formation Richmondian Late Ordovician Found at a roadcut near Graf, Iowa Gift from Minnbuckeye.
  3. Hello, I have a femur and metatarsal and thanks to this forum, I've been able to use plenty of reference to ID Bison as opposed to Bos with decent confidence. However, I'm wondering if there are any references or tips on identifying species. I hear B. antiquus is tricky to tell from B. bison, but are there consistent size differences? Both were found in Ames, IA in Squaw Creek in sandbars after spring flooding. This femur is 45 cm (~17.5 in) long and the distal is 11 cm (4.5 in) wide. The metatarsal is 20 cm (~8 in) long and 8 cm (3 in) wide.
  4. Collection of a new member

    Hello everyone, New member from Minnesota, post my intro in the member introduction forum. The first is my Minnesota fossils. From the Cannon Falls and Rochester area from Ordivician period. The first is a Cephalopod from Rochester. One other from Minneapolis area from Ordivician. Apologies but most of it is unprepped at the moment Will have to post images in multiple posts. The Second will be my collection from Iowa. I have stuff from Montana that I will post in a different thread.
  5. Tooth found in Iowa

    Found this tooth while arrow head hunting in Southeast Iowa. Anybody know what it is?
  6. Iowa mammal bone ID help

    Hi everyone, I found what I think are a lumbar vertebra and an astragalus bone. I'm not sure how old they are, but they both seem pretty weathered and possibly mineralized. Both appear to be from bovids(?). These were found on a river sandbar around Ames, IA after recent spring flooding. Does anyone know how to distinguish bison from cattle bones? The vertebra is 35 cm wide, 10 cm long, and 8 cm tall. The astragalus is 7.4 cm long, 5.5 cm wide, and 4 cm deep.
  7. Gastropod ID

    This gastropod was found in a block of matrix from Graf, Iowa that I split open last week. I have never bumped into this type of gastropod from there before. Research has left me stumped. Suggestions are welcomed! Elgin member, Lower Maquoketa formation, Ordovician. Thanks for the help Mike
  8. Interesting fossil. Egg?

    Hello, I know this is most likely not an egg but I had to see what someone else thought. This was found in Jackson Co. Iowa which is on the eastern boundary of Iowa. It was in a dry creek bed below an old limestone quarry. The quarry has not been in operation for a long (unknown) amount of time. We find many interesting rocks here after heavy rains that I do not see normally in other parts of our county or Eastern Iowa. This one is about 6cm in length and about 97 grams. any thoughts?
  9. This is a new one for me. A neat little button-like horn coral: Dipterophyllum glans from the Middle Mississippian Burlington Fm. of Iowa. Didn't know which forum to share this, so I thought I'd drop it off here for posterity (scale in mm)
  10. Spirifer subaequalis?

    @Tidgy's Dad, I have this one as Spirifer subaequalis. Location and stratigraphic info in tags. Pedicle valve: ~14 plications in sinus at margin. >20 on either side of sinus at margin (some not preserved). Thoughts?
  11. Strange rock from Davenport, Iowa

    My daughter typically finds sponge fossils and crinoid fossils at our home here in Iowa. However, she found this little guy and brought it in the house to keep. We aren’t sure what it is. I thought maybe it had a lot of iron in it so I used a strong magnet and it didn’t show any ferromagnetic properties. it looks like small bones all bunched together to us. However it is so much different than what we usually find that we thought we would ask for advice. Any thoughts? Could this be a fossil or just some mineral deposit? we look forward to your responses.
  12. Oddity is it possibly...

    Hello, I found this at the beginning of 2018 and haven't given it much thought until I saw the post from 2016 about a strange specimen that looked like Native Americans carved. The topic has been linked below. Below is the specimen I found and was curious if its the same process and is also counter septarian? I also thought they might be beekite rings. Any thoughts and ideas would be greatly appreciated. Best regards, Paul
  13. Dire Wolf Skull

    I tend to track some high end auction sites that deal in (sometimes) complete fossil skeletons. One of these is offering a Dire Wolf Skull. Since it is a for sale site, I do not link to it. However, the seller does provide DETAILED Photo enhancement capability, and the writeup is excellent. So, TFF forum rules, can I cut/paste the photos and the text to this TFF thread for all to evaluate? This would certainly fall into fair use of the materials, even if copyrighted, which I doubt. Dire Wolf. Canis dirus. Pleistocene. Nodaway River, Page County, Iowa, USA I think I have a piece of this but not that big of a piece...
  14. A couple of rough trilobites for ID

    I am down to my last few trilobites to label from this summer yet. Am open to suggestions on these less than perfect finds: 1. Found in the Galena/ Ordovician of Iowa. Isotelus? If so, is the species obvious? 2. Found in the Platteville formation/ Ordovician of SW Wisconsin. Flexi? 3. Another Galena/ Ordovician but from Minnesota
  15. I have some fossil elk vertebrae and I would like to display them upright. Any suggestions for stands that can hold these in a stable way? Thanks
  16. Fingerprint Like Rock

    I have a little rock, smaller than a marble. It looks like a fingerprint on a rock. Any ideas what it is? That's a marble for size comparison.
  17. Rockford, Iowa fossil sites?

    Any fossil sites around Rockford, IA other than fossil park? Want to hunting with my kids for a while. What about fossil sites between Waterloo, IA to Dubuque, IA?
  18. I can't seem to find an ID for this find. I believe this may be a siphuncle. What do you guys think? The "V" shaped sutures are really throwing me off. Has anyone seen a straight shelled cephalopod with this "V" pattern? Kinda neat how you can see how this was buried, preserving one side as it weathered the other. Then along came a dozen crinoids or so a used it as a nice base.
  19. Last Autumn, I found a large favosite coral embedded in quite a bit of matrix. It measured 24cm by 13 cm, which is large for the location it was found in. It was only a coral, but I put quite a few hours into prepping this piece. Finally done!!!!
  20. Iowa Mandible (Deer?)

    Hello! I found this mandible yesterday in a creek in Linn County, IA. It reminds me of a modern whitetail deer, but I'm not sure. One thing that stands out to me is that the middle tooth has three labial lobes. I have a modern whitetail doe adult to compare it too (see last picture), but only the end tooth has three labial lobes. Does that mean this isn't a whitetail deer or is that normal genetic variation? Total length of mandible (broken): 83 mm Thickness of mandible: 19 mm Width of tallest tooth: 20 mm Thickness of tallest tooth: 9.4 mm Thanks! @Harry Pristis
  21. Unidentified tibia from an old collection

    In an old collection I found this small tibia. It is missing the proximal end. I believe this fossil came from Lower Snake Creek making it Miocene. I have no idea what this would have been from. Ruler in pictures is in inches.
  22. Mike @minnbuckeye kindly sent me a package of orthocone nautiloids from his area recently. It's one of the taxa that are sparse in my collection so I was happy to accept the offer. I'm posting them to show what a generous guy he is and to elicit more info about them that might be missing... I don't think that big one in the lower right was labeled - Is it the same as the other large one, Elgin IA?
  23. Teeth from an old collection.

    This is my first endeavor into fossil identification and I find it fascinating! I am going through an old collection here at the nature center in Marshall County, Iowa. The collection all seems to have come from Lower Snake Creek in western Nebraska. Most of the fossils in the collection are various horse teeth but these three are different and I need some help figuring out what they are. #1 Length: 43mm Width: 23mm Height: 27mm #2 Length: 35mm Width: 20mm Height: 26mm #3 Length: 23mm Width: 13mm Height: 16mm
  24. I found this tooth at work in the sand in Northwest, IA. My sister had found one very simular to this one but allot smaller about 45 minutes from where I found this one at a quarry in Southeast, SD. She said it was from a prehistoric shark that only ate shelled mollusks thus the texture of the tooth that appears to be for grinding. Long story short my sister is wrong allot so I'd like to get some facts on here. I have other fossils that have yet to be identified that I will post soon. Thank you.
  25. Iowa Trace Fossils???

    Hey all, I found this slab of rock in a Linn County, IA creek this spring and I'm not sure how these patterns might have formed. Are they trace fossils from something? Did they form for normal geological processes? It's hard to pin down age of rocks in a creek like this, but most of our exposures are Devonian or Silurian. Thanks!
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