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Found 84 results

  1. 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!!!!
  2. 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
  3. 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.
  4. 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?
  5. 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
  6. 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.
  7. 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!
  8. 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?
  9. 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)
  10. 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.
  11. 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
  12. 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.
  13. Skin?

    Found this when I was a kid in Iowa and just rediscovered it at my mothers house. Could it be a skin fossil?
  14. 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:
  15. So Thursday afternoon i drove 3 1/2 to the Clarion Hotel in Iowa City, Iowa so I could be up bright and early for the start of the show. Like Tucson and other show locations, there is a Hotel Show that takes place inside the Clarion on Thursday thru Saturday nights. I have to admit that I had more fun at the Hotel Show versus the couple hours that I spent at the actual show today. I would guess that there were maybe 30 rooms that were open and that contained mostly fossils, but some minerals. Not all of the vendors at the hotel participate in the actual show. With that said, I was really disappointed in the amount of vendors that showed up today for the show, but I did hear that there was some show taking place on the East Coast, and many of the vendors went there. I will start with a few pictures from the Hotel Show. Here are Pics from the actual Show:
  16. Fossil concretion, tooth or man made???

    Mystery here. I found this near home on the banks of the Mississippi River here in east central Iowa. The geology in this area ranges from Ordovician to Pennsylvanian but with lots of glacial erratics and glacial mixing, not to mention the river mixing everything up!! It looks like a fossil concretion kinda like the Mazon Creek ones but is unusually polished, like a celt. Any input would be much appreciated!
  17. Need help IDing tooth found in NE Iowa!

    I found this tooth in a dry creek bed in NE Iowa. The area I found it in is unique due to the fact that even though it is surrounded by farmland, the sheer rock bluffs and rock overhangs cut by the little creek over the centuries made this area unsuitable for farming. Northeast Iowa was apparently missed by many of the ice advances during the Ice Age so the area as a whole has a much older surface geology than found anywhere else in the state. The tooth is between 1 1/16” and 1 3/16” in all measurements. It looks too old to be from a cow though I’m sure they have been in the area since first settled. The closest thing I’ve found myself online is a tooth from a prehistoric camel. Any help IDing it would be much appreciated!
  18. Bumastoides ?

    Hello, Roommates! I received this little trilobite as part of my Secret Santa package, and, though i know the eyes are missing, and parts of the pygidium etc., am rather fond of the little fellow. The label with it said Illaenus americanus and it was said to be from the Galena Limestone, Upper Ordovician nr, Postville, North East Iowa, a quarry or a roadcutting. Now the first thing I discovered, and please correct me if I'm wrong, is that the name is no longer valid and this is now Thaleops laurentiana. And on looking closer, it doesn't seem to be it at all. The lack of axial furrows and general effacement led to me to think Bumastoides sp. so i then read up on the paper https://www.researchgate.net/publication/257656692_A_systematic_revision_of_the_Upper_Ordovician_trilobite_genus_Bumastoides_Illaenidae_with_new_species_from_Oklahoma_Virginia_and_Missouri?enrichId=rgreq-42948ac4406fefc77dead768950eae0b-XXX&enrichSource=Y292ZXJQYWdlOzI1NzY1NjY5MjtBUzo5NzE0MzExMzEyNTg5NUAxNDAwMTcyMTMxNjE4&el=1_x_2&_esc=publicationCoverPdf and so on. I also discovered this (second item down, left hand margin : http://www.robertcharleswolf.net/newsletter942186.htm So it could actually be Maquoketa Formation, Elgin Member. The specimen seems to have 10 segments in the thorax so I'm thinking B. porrectus or B. beckeri. Any help greatly appreciated, here are a few photos:
  19. Thanks to @minnbuckeye who gave me a site suggestion to an Iowa Devonian locality when I was on my way to the White River Formation of Nebraska, I was able to satisfy my palaeozoic fix this past June. Here are my finds (scale in photos is cm/mm): Orthospirifer cf. O. cooperi Strophodonta sp. Cranaena sp.
  20. Conularid.jpg

    From the album Fayette County Iowa

  21. K16048A.jpg

    From the album Fayette County Iowa

  22. K16048B.jpg

    From the album Fayette County Iowa

  23. Receptaculites Oweni.jpg

    From the album Fayette County Iowa

  24. ??.jpg

    From the album Fayette County Iowa

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