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Found 286 results

  1. Mazon Creek ID- Euproops danae?

    I cracked this Mazon Creek concretion open today, and I am thinking that it is a Euproops danae Horseshoe crab, but not positive on this one. What do other members think? @RCFossils
  2. I have a lot of unopened Mazon Creek concretions and though I do put some out in the winter for the Freeze / Thaw process, the vast majority, especially the larger ones do not open. So to dwindle my concretions, I have no problem whacking them with a hammer, and that is what I was doing today. As we all know, this is not the best way to do it since it can damage a nice specimen, but I take my chances. I always picked up any concretion that looked promising and never passed up larger ones. This all depends on the are that you are collecting, concretions from Pit 11 are never super large, but Pit 4 always produced larger ones - see below. Though these are large, they are by no means my largest. The vast majority of the time there is nothing inside, like the one below. Other ones produce something nice, like this Alethopteris that I cracked open today. Cleaned up_ A couple of my other finds from today, nothing spectacular, but is nice to get rid of the dud ones. Neuropteris Annularia Annularia, Neuropteris and Bark Asterophyllites Bark Essexella asherae Jellyfish
  3. Two Mazon creek pieces

    I have these two Mazon Creek pieces out of a big group that I picked up, and I am a little at a loss to figure out what they are. The others I was able to figure out generally, even if not a specific species, but not sure on these. Any help would be great!
  4. Mazon Creek Fossil ID please - 1

    Here is the first of my cracked concretions from my first trip to Mazon Creek. Unfortunately, I cannot remember if this was from pit 11 Essex biota or from Braceville Mound. It seems like there might be segments and little filament-like branches, but I'm truly not sure. Also, the dark color is throwing me off. Any ideas???
  5. What part of this is a worm?

    Hello TFF. Sorry if this is a dumb question but I'm a newbie and I think I should know as much about my fossils as I can. I have a little mazon creek worm, but I can't tell what part is the worm. Is it the white part?
  6. Unknown mazon help

    Going through my collection, I've come back across some pieces that I am unsure of, some of them may not even be fossils, others I have an idea about but I'd like to hear the community's thoughts. 1 coprolite, plant, mineralization? 2 shrimp antennae or legs? 3 4 5 6 trace fossil or "H" 7 8 partial scallop? 9 coprolite, mineralization, worm? 10 11 I'm 95% sure it's plant but I want to make sure it's not tooth
  7. Can someone help?

    I just got a supposed tully monster fossil from the ESCONI auction today and im worried it may not be what they said it was. I want to also open it up more but im scared on how to do it.
  8. Mazon Creek ID

    Hi there had a successful outing at Mazon Creek today! Came back home with a 5 gallon bucket full of nodules. Made it a long walk back to the car though! Was hoping to get some insight on some of the preopened nodules and the ones that crack open in the future. 1.) 2.) Sorry if pictures are poor quality, I tried my best. Please let me know if better ones are needed .
  9. Ever hear of the Fiji Mermaid?

    I found this Kallidecthes richardsoni Saturday at Mazon. It's preserved in the "life position" which is rare. But also it's tail is turned and fanned out from the dorsal side, which gives this quite the "fiji mermaid" look. This was my best find of the day (that was open) and my best example of this species so far. Also there is an eye stalk present which is a bit strange. I didn't think this species had eye stalks. Jack @fiddlehead have you seen eye stalks in this species before? And have you ever seen this tail fan preservation before?
  10. This weekend was the first weekend that the Mazon Creek formation in Braceville, IL was open for collecting. Each year, visitors and avid collectors flock here every spring to gather concretions from this woodland, that potentially hold 300 million year old plants and animals. They are very difficult to find these days. It used to be a coal mine where fossils were gathered by the bucketload. These days, you would be very fortunate to gather 1/2 bucket in a full days collecting. I went the mornings of 3/3 and 3/4, for about 2 hours of collecting each. The haul was a total of 27.8 lbs of potentially fossiliferous material. Only 1/10 of the concretions will hold a good fossil. For my in-the-field trip report you can check out my blog: http://americanfossilhunt.com/2018/03/04/mazon-creek-opener-2018-day-1/ ...there I post some field photos and the day's collecting vibe. Below is what I came home with. Not much to show off in regards to already opened concretions, a few jellyfish and worn out ferns, but the closed ones will hold the treasures. Here is the collecting terrain, at the South Unit, just before the bend in the trail. I also collected the North end of Monster Lake. Here is the ~28lbs in full There were some very nice symmetrical shapes within the finds. Another close up of some of the more promising ones. And the ones that were already opened in the field. Will post updates as these crack open! for now, they are out for processing.... AKA soaking in water for 5 days, then freezing, then thawing, then freezing... for about a dozen times. I was fortunate enough to run into some ESCONI and FF members on my way out on Sunday. I wish it wasnt an early call for me, would have loved to been out there with them! Updating this thread as the finds open, but it may take a week or 2. And will likely be out collecting again before then.
  11. More Mazon mysteries

    Need help identifying this 309MYO Mazon Creek critter.
  12. Flat worm? Tully monster?

    A nice old gentleman gave me a bag of fossils he gathered at Mazon Creek many moons ago. Unfortunately he didn’t bother identifying most of them or even double checking that the rocks actually contained fossils at all. So I’m left to sift through them and figure all that out. Here’s one I’m having trouble with: Now, don’t any of you be getting my hopes up by saying that it’s part of a tully monster, lol.
  13. Ginkgo leaf or something else?

    I am wondering if this is a Ginkgo leaf or something else? Looks like a Mazon Creek fossil to me.
  14. Worm?

    I found this nodule last summer and opened it about a month ago. Could it be a worm? I didn't know if the two adjoining dots on the left were jaws.
  15. Mazon Creek Annularia or Cephalopod

    I am at a 99% certainty that this is just a weathered annularia, but there is a very small percentage of my thinking that it might be the cephalopod, Jeletzkya douglassae. I know that J. douglassae has 10 arms and this concretion has 9 branching (leaves / arms?). I collected this 1/2 concretion years ago at Pit 4 (Shadow Lakes- Braidwood Flora / Fauna) What do you think @fiddlehead, @RCFossils?
  16. Hi, I am not a fossil hunter but accidentally discovered the ability to find 300,000,000 yr old fossils in Mazon Creek on a TV show. Wow!!! I've been researching all day and now want to take my family there for spring break in March! Our story (short) & my questions: My daughter is very interested in science and nature and critters. She spends hours outside digging contently for rocks, loves bugs, has rock collections, books on rocks & minerals, etc. She struggles in the classroom (3rd grade) and learns best by hands on experience. She would absolutely be in heaven here- our whole family would! I love to help my daughter experience her interests through our adventures. What advice could you give a family of 3 who has never hunted fossils? We are in Missouri so interested in camping close by- does anyone know of any good evening Camping places? Do we need to register with the state park and get daily admission? Should we go where most tourists go or off the beaten path? Is it possible for newbies to find a few fossils? Even if we found the most common we'd be so excited! We love exploring and take small hikes as a family. Are there spots within a couple miles of the "road" or parking? I truly appreciate any help! I will keep researching as well. I hope we can go and see this unbelievable history!!
  17. Mazon Creek fish scales

    I am asking for help identifying the species of some fish scales from Mazon creek. The scales were too small to put a scale in, but the whole patch is about 1.2mm in width. On the reverse side of the concretion it appears there are some spines under the scales, possibly from the fin. My initial thinking is Rhabdoderma Exiguum as the fin looks similar to me as an example from RCFossil's collection:
  18. Mazon Flora help

    I've had a few specimens in my collection that I have questions about and am seeking some clarification. #1 another view #2 #3
  19. Mazon Creek ID help

    Hey Everyone! Happy new year! A nodule from South Pit 11 Mazonia area split and can't figure out what it is? Millipede? Shrimp tale? I have the Wittrey book I've been looking through and I see similar features on multiple animals from his pictures. Thanks for your help!
  20. I Lied

    Sorry, I forgot about this one. If I post another within two weeks, I promise to distribute my entire Mazon collection among you all. Offer void in the United States and other countries. I think I know what this is, as I see a similar image of one in an RCFossils album. But just to double check, this is what I believe it to be: Mamayocaris Jaskowskii.
  21. Mazon Unknowns - Slug?

    To all of those who have made suggestions, educated guesses, and definitive identifications: This is the last one I currently have a question on, and I want you all to know that I have appreciated all of your efforts in helping me to understand and identify some of my more problematic specimens. I have learned a lot from the information on The Fossil Forum, the galleries, and from comments and links provided by everyone. Most of all, I have learned that I know very little, and that makes me appreciate your knowledge even more. Thank you so very much! ~Paul
  22. Mazon Uncertains - 10 ?

    Are these leaves or wood, or nothing at all?
  23. Mazon Uncertains - 9 ?

    The first and last ever discovered baby bottlenose dolphin to be found at Mazon Creek! How lucky am I? Not a clue.
  24. Mazon Uncertails - Tully?

    Really don't have much of a clue, but think I'm seeing a tail fin at the very least.
  25. Mazon Uncertains - 7 ?

    What I first thought to be a Cyclus, after photographing with shadows, looks kind of like a jellyfish (Reticulomedusa?).
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