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  1. Sauropod19

    Mazon Creek ichnofossil?

    Hello. I found this piece during my first visit to Mazon last year and just got around to asking about it. I believe it may be tracks of some sort, as they look vaguely like other arthropod ichnofossils. I was wondering if anyone may be able to confirm my suspicions and possibly ID what kind of animal it could be. I understand this second part is difficult without anything else to go off of, and I apologize for lower camera quality than the other images I’ve seen here. Thank you!
  2. The annual I&M Canal Corridor Fossil Trip was split between two weekends this year. Saturday, August 13th and Sunday August 14th, 2022 were family and beginner days, while more experienced collectors had their opportunities on Saturday, August 27th and Sunday, August 28th, 2022. From the look of what was found, the families barely made a dent in the supply of fossils. In case you are not familiar with the history of the site, the Kodat/Benson farm is designated as a National Historic Landmark in 1997. Statement of Significance (as of designation - September 25, 1997): The
  3. Saturday, October 15th, 2022 was the ESCONI Mazon Creek Open House. It was a great day with about 100 visitors to enjoy a event devoted to Mazon Creek fossils. There were numerous forum members in attendance.@connorp @bigred97 @flipper559 @fiddlehead @RCFossils @Roby @Hurtlady @jdp to name a few. For a full report with videos of 3 of the 4 presentations, please visit the ESCONI website. The fourth video will be posted after the research is published. Recently, we've had a few historical posts about the Mazon Creek Open House events in the past, Mazon Monday #133 and Throwba
  4. Hi — I was lucky enough to collect a few dozen Mazon nodules this weekend. But I am not familiar with how to best prepare and understand this material. Is there a guide that would answer questions like these: • Do I freeze-thaw specimens where fossils are already showing? What about 3d fossil that is partially obscured by matrix? • Are fossils best viewed wet or dry? (seems like dry) • How do I know what's a blobby worm or jellyfish vs a blobby bit of matrix? • Are there categories of finds (besides obviously empty nodules) that are not worth posting for ID?
  5. On September 17th, 2022, ESCONI held a field trip to a coal mine spoil pile near Danville, IL. It was a fairly hot day with temperatures in the upper 80's. However, it was a productive field trip. There had been quite a bit of work on the hill this summer and it was looking quite different from the spring. The road to the top went around from the left instead of the right. There weren't as many exposed fossils in "Red Dog" found this time, but concretions were readily available for collecting. There were a few Forum members present. @deutscheben @connorp I'm sure I'm forge
  6. so I know that in order to hunt for fossils at the braidwood area you need a permit (https://www2.illinois.gov/dnr/Parks/Activity/Documents/MZB_FossilPermit.pdf), but i’m not entire sure how to get one when i search up online a PDF comes up that can be filled out. Do i just fill this form and then send it to the DNR? Also, who can get the permit? Like, would it be limited to scientists/professionals or can the general public sign up for it too? Any clarification would be really appreciated. Also, let’s say I got the permit. What would be the best places to
  7. Sauropod19

    Mazon Creek find

    Hello! I recently went to Mazon creek and was in the process of thawing my concretions when I saw this, and was wondering if y’all could help me ID it. I’m thinking maybe a shrimp, but am not very familiar with the fauna (or flora for that matter) of the area. Thank you!
  8. debivort

    A few more Mazon pieces for now

    Here are the last of recently collected Mazon material with fossils already showing. More to come as the freeze-thaw cycles take effect. Thanks as always @Nimravis @stats @RCFossils @deutscheben @Mark Kmiecik @Runner64 Specimen 1 (4.1 cm long) — A fern, found as is. Enough detail for an ID? Specimen 2 (9.1 cm long) — Macroneuropteris? Found as is. Did a light vinegar wash. Specimen 3 (2.7 cm in diameter) — Found already split. D and E illuminated to show relief. Now that my copy of Wittry's Fauna has arrived,
  9. debivort

    My first two Mazon specimens

    I had a great, brief opportunity to collect Mazon nodules at a private site. I'm new to this deposit, but really excited to start understand the material. I've started the freeze-thaw on the bulk of specimens, and ordered my copies of the Wittry books, but will post a few specimens that were already exposed or split at the time of collection. Thanks for your help in advance @Nimravis @stats @RCFossils @deutscheben @Mark Kmiecik @Runner64 Specimen 1 (6cm nodule diameter): found as a half, already split. As a newbie, I'm not sure if this anything, but follow
  10. Runner64

    MC 00001 - Astreptoscolex anasillosus

    From the album: Mazon Creek - Fauna

    Species - Astreptoscolex anasillosus Location - Mazonia-Braidwood Wildlife Area Formation - Francis Creek Shale
  11. This worm(?) is vexing me. I've got some clues, but none of them seem to add up to a definitive ID. Any ideas? These photos are from the vendor's listing of the specimen. Yes, I've been through the books, several times. I'm far from an expert in MC material, so any assistance would be greatly appreciated.
  12. connorp

    Francis Creek Shale

    The Francis Creek Shale in northeast Illinois is best known for producing Mazon Creek concretions. However, the shale itself also contains an extremely diverse and well preserved flora (and fauna occasionally). Unfortunately, the shale is extremely soft, and quickly weathers to clumps of clay. This makes collecting from the shale very challenging, and most collectors don't even bother trying. On a recent trip I found some fresh chunks of shale and decided to try and save some of the plants. Even working with fresh shale, it was still very hard to extract anything. Larger pieces crumbled easily
  13. Nimravis

    7-10-22 Mazon Creek ID

    @stats, @fiddlehead, @Mark Kmiecik, @deutscheben, @connorp @RCFossils and any other member. Here is a piece that I cannot put my finger on and don’t recall seeing one before. Any help would be appreciated.
  14. Nimravis

    Mazon Creek ID

    @RCFossils @fiddlehead @stats @Mark Kmiecik I am opening concretions right now and this one split with a nice little tap. It looks like flora, but I don’t recall this piece. If it was from a later time period I would say it was a pretty feather lol. Any help would be appreciated.
  15. Hello everyone, I hope everyone is doing well I have recently started getting myself into collecting fossils and I came upon this lot of jellyfish fossils so I purchased them because they seemed interesting and it’s something I never had. Do these look fine ? To me they just look like stained rocks but that could just be because jellyfish are soft bodied organisms. Thanks for your input
  16. TheRocksWillShoutHisGlory

    Multiple mazon creek pectin

    In the freeze that process it is common for concretions to flake, on a piece of the flaked off rock I came across multiple pectin fossils including a couple that are about 1mm and am asking for help identifying the species.
  17. JimTh

    Popped some Mazon concretions

    Hi folks, I went to the spoils pile with ESCONI pre-covid. I've had a bucket sitting out back ever since with concretions. Went through it today and banged a few together. I am not good at recognizing Mazon material, so I thought I would ask for some assistance here. I'm 99% sure 1A is a jellyfish, I haven't sorted out the name yet though. 1B appears to have some whiskers or antennae, so I'm hopeful it's some sort of shrimp or creepy crawly. The rest I'm kind of at a loss on. Any help appreciated!
  18. Ordivician19

    Is this a jellyfish? Mazon Creek, IL

    Hi! I’ve been working on opening some nodules from Mazon Creek, IL, and opened this one about an hour ago. I’ve been looking at pictures online of jellyfish and have seen some loosely defined like this nodule, though this is probably just a regular old concretion. What do you think? Thanks! P.S. In hindsight I realize that wetting this nodule down wasn’t particularly helpful lol
  19. TyrannosaurusRex

    Mazon Creek Freeze/Thaw

    Howdy folks. I had a question about soaking mazon creek nodules before starting the freezing process. I’ve had mine soaking in water for 2 days (prior to the first freeze, will be several more days), and there seems to be oil on the surface of the water. Is this normal, or is it something I should be concerned about? This is my first time doing this, and I just want to make sure I’m doing it right. It is just plain water, I’ve added nothing else to it. Thank you!!!
  20. The Reno

    Mazon Creek ID help

    I just had a concretion pop after thawing out today. Lo and behold, it actually has something inside. I’m not really sure what to make of it. Any ID help would be greatly appreciated. It’s about 1.5 x 2 inches. One wet and one dry picture
  21. A nodule from Mazon Creek opened up this week and revealed a nice fossil. I believe it is a Neuropteris Seed Fern Leaf based on pictures examined. The curious thing is the additional leaves that exit the stem. Is this typical or representative of the species???
  22. minnbuckeye

    Oddball Mazon Nodule

    My bucket of mazon nodules collected this summer have been sitting outside in the sub zero temperatures all winter. I was finally able to fetch the bucket and thaw them out recently. The nodule presented split completely different than other nodules that have opened. This one is a heptagon prism, VERY geometric, not split on a horizontal plane like I am used too . Is there a fossil present on the upper surface and have others experienced nodules opening up geometrical like this one? Thanks for looking Mike Front view Back view.
  23. KompsFossilsNMinerals

    Mazon Creek Thing

    I was splitting open some Mazon Creek nodules I've had for a while about a half hour ago when this enigma popped out, I have no clue what it is. The nodule is from Pit 11.
  24. minnbuckeye

    Mazon nodule unknown

    Need a little assistance identifying this. THANKS!
  25. Jones1rocks


    This is a half nodule with impressions of several leaves and what I believe is a stem connecting them, from Mazon Creek. Are they Cyclopteris?
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