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Found 95 results

  1. 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?
  2. 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)
  3. 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?
  4. 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.
  5. 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
  6. 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...
  7. 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
  8. 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
  9. 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.
  10. 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?
  11. 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.
  12. 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!!!!
  13. 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
  14. 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.
  15. 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?
  16. 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
  17. 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.
  18. 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!
  19. ID?

    A friend of mine put this on Face Book and was asking if anyone knew what type of fossil it is. He found it in southeast Iowa. Any ideas?
  20. Went out to Iowa for a Devonian hunt. Found a few placoderm teeth and what I'm told is a Dunkleosteus jaw/tooth bit. I'm happy. Can't wait to go back this Fall. I also found some nice crystals, pyrite and partial trilobites. Placoderm material Anyone know what this is from? My best guess is possible shark tooth.....? Dunkleosteus bit (it needs some prep and reconstruction)
  21. Excursion/Field guide/IOWA

    here(lessthan 5 Mb) The Cedar Valley/Lime Creek piece by some noted experts would seem to steal the show. Fig 3, with its correlation chart. (useful inclusion of a Vail Transgressive/Regressive cycle chart!!!!) Figure gets better and more useful each time I look at it.
  22. Iowa Mammal Teeth ID

    Hello, I'm a new member to the Fossil Forum, could someone please help me ID these teeth? I found the larger, blacker tooth this morning on a sandbar of a creek in Linn County, Iowa. My wife found the smaller tooth on the same little sandbar about a year ago. I have found several bison teeth in the many other locations I have walked up and down this river, but these two have been stumping me. These are the only teeth we have found so far that still have roots intact which leads me to believe that they did not travel very far in the creek. These may or may not be from the same animal, but two strange teeth from the same spot makes me wonder if that could be the case. The smaller one has a stylid, but even the small one is thicker than the bison teeth that I have. Two photos compare size to a modern bison jaw. Small tooth: Width: 26mm Thickness at top: 16mm Enamel height: 32mm Large tooth: Width:29mm Thickness at top: 27mm Enamel height: 14mm
  23. Brachiopod unknown

    I collect in Coralville Iowa frequently and always run across these brachiopods. Yet I am unsure of their name in spite of investigation on line. They are NOT uncommon so the ID should be easy but eludes me. So here I am asking for assistance! They are flat as a pancake if that helps.
  24. Skin?

    Found this when I was a kid in Iowa and just rediscovered it at my mothers house. Could it be a skin fossil?
  25. Two weeks ago while I was at the ESCONI Fossil / Mineral Show, I bid on and won a great little piece of rock that was identified as Isorthoceras sociale Cephalopods from the Upper Ordovician - Maquoketa Formation of Graf, Iowa. I did a little research before heading out to the MAPS Show yesterday and decided on my way back home, I would take a 1 1/2 hour detour to Graf and see if I could find this small road cut. I have to admit that this approximately 300 ft long road cut contains what must be some type of mass Nautiloid death bed. There are so many of them that you will for sure go home with your fair share if you ever get a chance to visit the very out of the way place that is hidden among farmland. I will give a couple warnings for this location- there is no shoulder to park on and you have to drive on the grass/dirt area that is muddy. Secondly, people have under cut these Nautiloid beds and there are TONS of rocks above your head in sections of this road cut; It is not a place for young kids nor a place for a Risk Taker. Besides the Isorthoceras sociale that I found, I also found a couple nice Gastropods. This is a place that I will not visit again since I did collect enough loose pieces and blocks that I found around the area. Here are some pics of the area as well as some of my finds:
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