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Found 423 results

  1. Anyone out there have any Tully Monsters they would be willing to trade. Partials ok. PM if you want.
  2. The Mazon Creek deposit records one of the best representations of Pennsylvanian aged millipedes. A variety of different types have been found representing several different orders. This is one of the rarer and lesser known types belonging to a relatively new order named Pleurojulida. Pleurojulus lacks spines and has body segments that consist of an upper and lower plate. It is one of the smallest millipedes that can be found in the Mazon Creek deposit.
  3. There are 5 pectinoida (scallops) that can be found in the Mazon Creek deposit. Aside from Aviculopecten mazonensis, all are uncommon to rare. Dunbarella striata is commonly found in Pennsylvanian aged black shales but fairly rare in the Mazon Creek deposit. Like all Mazon scallops, they are only found in the Essex (marine) portion of the deposit. It has a relatively round shell compared to the much more common Aviculopecten. I actually collected this first specimen on March 1st 2020 (opening day for collecting). It just split open this evening and is the largest example that I have seen.
  4. Chitons are the most primitive of all living mollusks. They belong to a class called Polyplacophora (bearer of many plates). There lineage extends as far back as the late Cambrian. There are over 430 described species in the fossil record. Almost all are only known from individual body plates or valves. The Mazon Creek deposit is one of the only sites in the world where complete examples have been collected. Modern chitons have changed little from Glaphurochiton concinnus. The basic chiton body plan consists of 8 valves made of Aragonite. The front plate is named the cephalic plate and the rear plate the anal. The plates have fine ornamentation which is a key feature in differentiating species. Modern chitons can roll into a ball when threatened. The muscular body is known as the girdle. This girdle is covered with tiny spicules that are sometimes preserved on Mazon specimens. Most modern chitons use this girdle to attach themselves to rocks. To feed, the animal has a radula that can have over a hundred rows of denticles. Each row consists of 17 each. Most modern chitons attach to rocks and feed on algae. Glaphurochiton was a mud dweller feeding on detritus. Like all chitons, Glaphurochiton is strictly marine and is only found in the Essex portion of the deposit. Glaphurochiton is rare but 2 concentrations of chitons have been found. The areas have been termed “chiton hills”. It has been noted that modern chitons have a homing ability to return to there same resting spots despite lacking eyes. This first example is the largest chiton that I am aware of that has ever been found in the Mazon Creek deposit. Not including the skirt, the animal measures 70 millimeters. The typical size is usually between 30-40 millimeters.
  5. Friends- Thanks for your patience with my last couple of posts, these concretions are a carnival ride. I collected this delicate little (9mm) winged insect in 2010 at the Mazonia-Braidwood South Unit. Any thoughts on what ballpark I should be looking in for an ID? Some kind of damselfly, maybe? (Is it possibly newly-hatched with uninflated wings?) I appreciate your time.
  6. Ok. So, apparently I need my eyes examined... Thanks, everyone. Maybe I'll have better luck with invertebrates. I'll post more photos separately, but here's a preview:
  7. 'Morning, everyone. I appreciate all the input on my last post, which was an outstanding demonstration of the Venn diagram of photography, limited magnification, and apparently wishful thinking... Less of a mystery here -- I'm trying to ID this little (11mm) fella. I collected him in 2010 at the Mazonia-Braidwood South Unit. The ESCONI guide doesn't seem to have anything similar -- thoughts? Thanks.
  8. Hi, everyone, it's been a minute -- I hope y'all are well and that you and your families are healthy and safe. I'm required to say "y'all" since we moved to New Orleans last summer. Fantastic city, great people, but I won't be peeking in the Chesapeake or anyplace else on the East Coast again any time soon. Then, *this* all happened. During this lockdown, it occurred to me that I could finally get around to trying to identify some of the material I've had sitting in boxes for years (and I'll post a few others). But what do I find when I log onto the FF after ages? A positive gaggle of Mazon ID posts. Love it! I collected this little fish in 2010 from the South Unit at Mazonia-Braidwood. He measures a whopping 13mm from nose to tail. I've been poking around on the web but I'm having a hard time with the ID. It looks like he has two spiky fins sticking up from just behind his head (they're clearest in the last photo). My brain itches with knowing that I've seen this guy someplace before, but I just can't find him again. Thoughts? Thanks...y'all.
  9. Another Mazon Creek ID thread

    I wanted to join the squad of great Mazon ID threads we have had in the last week. These two were found split on my opening day trip to Mazonia-Braidwood/Pit 11. I only found half of the first one. It doesn't look like much, and it may be nothing, but its worth asking! The second one was split, but both halves were present. It is much more clearly something, but I'm not sure what, as there are not any clear features, although it is preserved with good definition and a nice contrasting color.
  10. Mazon Creek Finds, ID help please !!

    This first piece is a Mazon Creek fossil from Pit 11. Any help appreciated !! The second one is from the Creek itself, could this be a "fiddlehead" @fiddlehead . Thanks for looking !! Thanks, Phil
  11. Mazon Creek Research Help

    Hello, I am a local undergrad geology student working on a research project dealing with Mazon Creek's Braidwood and Essex Biota. As part of this research, I am required to collect specimens and data on both of these assemblages present. I have been informed that any access to the Fish and Wildlife areas in the Mazonia-Braidwood South Unit is prohibited due to the Illinois DNR's indefinite closure of all fish and wildlife areas, so I am taking this time to research and inquire about access to both assemblages for future reference. That being said, my questions are as follows: Are there certain areas within the public access sites that I should specifically be searching within that may contain a large diversity of specimens available for collection? Are there any landowners within the Braidwood Biota that are easy to contact and willing to allow people to collect on their land? Are there any public access sites to the Braidwood Biota or to the Mazon River itself for collecting? Are there any papers or articles I can reference that may aid me in my research? Thank you in advance for any advice you can offer!
  12. Mazon Creek ID help

    A few nodules I need help ID with @Nimravis. Essex biota and found in Pit 11. Thanks! #1.) I think this is some type of worm? #2.) Thanks for the help! I may be adding some more in the next few days for ID
  13. Mazon Creek ID

    Hey Folks. Heres another I’m wondering about. It looks like an example of diplocraterion, but I’m not certain. Thanks for the look.
  14. Mazon Creek ID

    Here’s another I’m not sure about. It may be nothing? Thanks for the look.
  15. Mazon Creek ID’s

    Hey Folks, Here are a few whatsits from yesterday’s hunt. First, my gut tells me plant material?
  16. Mazon Creek Pyritized Wood

    Last week I found what I think is pyritized wood from Pit 11. Is this the case? And if so, is there anything more scientific I can call these specimens? 1) 2)
  17. Mazon Creek Insect Wing or Leaf?

    This concretion from the Mazon Creek area Chowder Flats site split earlier this week but I just had a chance to examine it today. It preserves a narrow ~10 mm long veined object, unfortunately with a portion missing from the middle. The shape and venation makes me think of an insect wing, but it could certainly be a partial leaf of some sort instead. I would love to hear thoughts from anyone with more experience. I had to take the pictures through my loupe since it is so small- the first two are of the part and the third is the counterpart.
  18. Mazon creek arthropods

    I'm wondering if anyone can identify some mazon creek fossils the first 3 I think are shrimp or molts The 4th I was told was a "dragonfly body" I'm not sure what to think about that and am wondering if there is anything identifiable as an insect Finally it's not an arthropod, but just a curious color difference I'd like help with
  19. Mazon concretion IDs...

    Hey guys, I braved the creek yesterday on the first day of hunting season at Mazon. It was a thrilling first time getting to hunt there. These of the surface finds were pretty interesting looking and were among many duds, so I'm wondering if anyone has any ideas as to their classifications. The rest of the lot is in the freezer so look for my thread on that in a bit More concretions in the following posts: Thanks for looking!
  20. My granddaughter and I are coming to Chicago from 3-29 to 4-4. We’ve looked for Petoskey stones along the shores of Lake Michigan in Michigan, and found a few small fossils, but we don’t know how to hunt for them or what to look for or what equipment we would need. Any info would be helpful. We are looking into Mazon Creek, but a lot of what I’m finding is that it’s all picked over. Any other sites that would be good for two beginners? Thanks!
  21. Hi guys! Newbie here and finally joined so i could post this after our recent opening day trip to Mazon Creek, Mazonia-Braidwood and Pit 11. My daughter and I found this one and I can't tell if its nothing or something. Maybe an essexella asherae jellyfish? or maybe i'm dreaming. It was already split, we haven't done our freeze/thaw yet on the whole nodules yet. Seems we did manage to get at least two of the pieces that go together - could possibly have the last piece in the bucket still as we are still going through our haul, but after a preliminary look, I suspect this is all we have. I tried to get a few pics the best i could, but they now don't look as good as i thought. And I just read that using coins for scale is not a good idea - sorry. Hoping my Mazon experts out there will be more familiar with US currency, anyway. So - these are the same nodule from a few angles and one pic with the two pieces together. Any ideas? Or maybe it's nothing. I know i have a small one with annularia. This is one of the largest we found, so maybe it's just wishful thinking. After hours of looking at these things, i think i could see fossils in anything now. THANK YOU! (ok, now it's not letting me add my pics - too big.) I'll be back with the rest of them as soon as i figure out how to get the size down. Sorry!)
  22. Mazon Creek ID

    Hey Folks, Found today at Mazonia. Thanks in advance for your response. Arthropleura?
  23. Who is going to be heading out to Mazonia-Braidwood State Fish and Wildlife area for the start of the Pit 11 fossil hunting season on Sunday? They are forecasting a high of 58 degrees right now, practically t-shirt weather! (but watch out for those ticks) I am planning to be there Sunday and Monday, my first time trying two consecutive days. I hope to run into some other fine forum members out there.
  24. Mazon Creek Collecting Forms

    I have been looking into getting started collecting at Pit 11 in Mazon Creek within the Braidwood-Mazon State Park. I know that there are some forms I need to complete to collect at the site. From what I’ve found, the form isn’t even on the park’s website anymore and neither is the report that the form alludes to. Are these forms still valid? Where can I find them? Are there any other rules that I need to know?
  25. Is this Artisia?

    Taking another look at an Annularia (I believe sphenophylloides?) I saw a curious pattern in the corner and I was looking for some help identifying it. I was thinking it could possibly be Artisia?