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Found 21 results

  1. Spent a couple days collecting at Mazonia/Braidwood last weekend. Found a couple areas with decent open concretions, excited to see what opens up in coming weeks. ID help very welcome on these open ones, thank you!
  2. izak_

    Placoderm Trip

    A few weeks ago some friends and I visited a site near Braidwood in southern NSW (3 hours south of Sydney) for middle-late Devonian fish. The site was first published in Ritchie (1984) with the description of Placolepis budawangensis, a phyllolepid known only from this locality. This species is one of the two most common here, with the other being Bothriolepis longi (see Johanson 1999). So far, only these two species have been described from this locality but acanthodian spines and sarcopterygian scales are also known. All fish fossils from this locality occur in within a 75cm band of red siltsone and are mostly just disarticulated plates, but the P. budawangensis holotype is still fairly well articulated. The plates of both species are very recognisable, the Placolepis usually have lovely parallel ridges whereas the Bothriolepis are covered in tiny bumps. Some photos of the siltsone band with some fish plates exposed on top. Peter did a great job on this hole, it's not easy work! The specimens from this locality are quite weathered, so the bone is usually quite poor and doesn't split well. They still look nice, but I chose to dissolve away the bone in hydrochloric acid to latex the cavity for photography. Here are some as found: Placolepis: Bothriolepis: Some bone in cross section (the horizontal black dotted lines): Here are some latex casts of specimens after acid preparation. The latex is blackened with ink, then whitened with ammonium chloride for high contrast photos. Much easier to make out features in these than the unprepared specimens! Bothriolepis longi plates and pectoral fins (compare with figures in Johanson 1999): Placolepis budawangensis: Sarcopterygian scale(?): No idea on this one! After the fish site, we quickly stopped in at a road cutting which yields occasional Devonian plant fossils. Nothing too exciting, but still nice to find some Devonian plants! That's all for now, I might post more ammonium chloride photos when I take the next batch. Hope you enjoyed!
  3. Josher

    Mazon Creek Finds

    Kids and I went out to Mazonia Braidwood last spring. Been freezing/thawing nodules and found one that has us stumped. Would appreciate some expert input! My son asked me to also post the other one to see what you guys think. Thanks in advance!
  4. Hello everyone! I've been inspired by so many good Mazon Creek topics in this forum, I thought I would start my own. I'll post my own finds, which so far don't include anything as exotic as a Tully Monster, but maybe I'll get lucky on page 134 or so... I have to credit my kids with getting me interested in fossil collecting. I was always interested in rocks and fossils but when my 10 year old son had his dinosaur phase it really sparked my interest again. I wondered if an ordinary person like me could go out and find fossils? So I Googled fossil collecting and found out that not only could I search on my own, one of the world's best sites for amateurs was just 3 hours away! The date I discovered Mazon Creek existed was 9/10/2017. I know that date because earlier in the day was the last ESCONI trip to the Braceville spoil pile for the year - I just missed it! So in May 2018 I finally went on that trip and was hooked. Since then I've gone to Braceville several times, the I&M Canal trip once, and a handful of trips on my own into Pit 11. I want to thank too many people to list for helping me learn about this new hobby. Everyone I've met on the field trips has been so friendly and helpful. And if you have posted something about Mazon Creek on this forum, I've read it. Special thanks to Nimravis for his Sometimes You Have To Whack It thread, which he started the day after my first trip to Mazon Creek - it has taught me so much and I'm so impressed at what a genuinely nice person he is. And Andrew Bach's book from his American Fossil Hunt site is wonderful, so so helpful. With that, onto the fossils (and lots of questions from me). I thought to start I would show some of my jellyfish, all Essexella asherae, I believe. I find it interesting that they are all so different, although they tend to fall into various "types" - some have a distinct "head", others are just faint outlines, some are just cylindrical shapes. #1-3 below are all from Pit 11 - the first two have a distinct head and the other is more cylindrical. For anyone who hasn't heard of Mazon Creek, these fossils are found in siderite concretions from the mid-Pennsylvanian epoch of the Carboniferous period, from roughly 305-310 mya. Cheers! Chris
  5. My family (kids 4, 7 and 10) attempted our first foray for Mazon Creek fossils last week. We had a blast! Took it slow, explored the lay of the land and came back with around 300 concretions to freeze/thaw. Definitely a more ideal time of year to go with young kids, easier to see paths/where we were going and keep track of everyone, only one tick and no poison ivy etc. to worry about, just thorns. We ended up derailing onto some deer trails and bushwhacking through, but we also found some fun things that way. Main trails were very easy walking and the kids found enough concretions to stay entertained. GPS tracking was perfect, had whistles, camelbaks backpacks for all but the 4-year-old, snacks and rubber-coated gardening gloves plus a few kid-sized rakes. Permethrin on our clothes and picaridin lotion worked well. Pics below of some open finds (jellies, which for us novices is wonderful! We cleaned them up best we could, some are worn but that doesn't matter to a kid's collection!), then some unknowns. My husband found a great worm (we think!) of some kind. Pics below, and a few unknowns at the end. We spent Friday at the Field Museum to see their Mazon Creek exhibit. We hunted for a half day Wednesday and full day Thursday. A great weekend-type trip as a full week would be too tiring for us all. We will for sure go again, but may stick to spring before poison ivy etc. take hold. I'll update the post later with anything from our freeze/thaw cycles. Started soaking today! Few more pics next post.
  6. Hello All- I'm hoping to get some help with a few Mazon Creek concretions recently picked up around Braidwood/Mazonia. I believe this is pit 11. Have had some great help here in the past, so hoping to get some help with these 6 specimen below. I have an idea on some of the below but, but not sure if my eyes are seeing what I want to see- so curious to know if others see the same thing! thanks, -tom
  7. Patrick K.

    Mazon Creek ID

    Hello all - I had put this aside as a typical Essexella asherae (jellyfish) but after cleaning, I was unsure. It doesn’t have the base and this one has much more pronounced ridges/waves than any of the other of the ones I have. There’s 2 sets of images under different lighting. Thanks in advance! Patrick
  8. Sauropod19

    Mazon Creek finds

    Hello. I found three pieces in the Mazon Creek area that I’ve finally split open and am interested in. While there is a very good possibility that all three are just consequences of opening the concretion and not actually fossils, I figured I’d check. Image 1: I thought there was a slight possibility it was a leaf or a worm, but due to lack of detail, I imagine it is not. Image 2: Potentially the top of E. asherae or something similar. Image 3: I am actually just curious about what causes the small, light circles on the right side of the bottom piece and in the middle of the top piece. I’ve noticed these on many Mazon rocks and wonder if it is a mineral inclusion or something else. Thank you for taking a look!
  9. 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 go if I wanted to look for fossils mainly from the essex biota?
  10. 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!
  11. chrismalamber

    Mazon creek fossil id

    This I found only 1 size not sure if its anything or if it might be worth having someone clean it up. Thanks
  12. chrismalamber

    Mazon creek find

    Iam new to mazon creek fossil hunting, most of what I have found are plants which are identifiable. I have two items I think one might be a sort of worm and the other I have no idea if anything can help identify either if they are truly something. Thank you
  13. tom_mo

    help with ID- Mazon Creek

    Hello- I am posting for the first time on this site, it's been a great resource for comparing some concretions I've found over the past few years. I've been taking my son on these collecting adventures, and we seem to find at least one nice specimen per trip- although it sometimes take a few months for them to crack open! We found this concretion in Braidwood area, pit 11. It had already split but still together. I have some similar looking shrimp but not 100% sure what this is because the overall form looks a little different, so hoping to get some help here. Maybe it is a shrimp as well? thanks in advance for your help! -tom
  14. Thomas.Dodson

    Pit 11 Summer Fossils

    Over the Summer I conducted research in Illinois so naturally I spent as much time as I could collecting fossils. I had a particular interest in collecting Mazon Creek concretions. I had the fortune of making one trip to the area once over a decade ago but that was short and I didn't collect any Essex stuff. Because of that I focused in on Pit 11 this time. Summer may not be the best time for collecting there but my time in Illinois was limited and going in summer beats not going at all. Over the summer I persistently traveled to Pit 11 from Urbana 5 or 6 times. Most of the concretions are now open and I figured I'd share some of the better specimens I collected. First some worms, a nice Didontogaster cordylina and the better of two Dryptoscolex matthiesae.
  15. 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.
  16. 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.
  17. Rockpit

    Jellyfish? Folded Annularia?

    I found this concretion already opened and heavily coated with dirt and minerals. The few parts I could see poking through gave me hope something was preserved. Now that I have cleaned it up, I am still trying to figure out whether or not the concretion contains a fossil. It can look very different depending on the way you position it. I see a jellyfish looking mantle but the tentacles look different from what I have seen before. Positioned vertically, I start to lose the jellyfish and wonder if it is a partial annularia. Or maybe it is just a lumpily split concretion.
  18. Rockpit

    sedimentary rocks or fossils?

    Last time I was hunting fossils at Mazonia I picked up some rocks I found interesting. I don't know if they are fossils or not. The first is full of tiny holes I thought might have been caused by animals-or water .
  19. Rockpit

    Sphenophyllum?

    I have two different nodules from September that I think may be Sphenophyllum. Both nodules were found open, one had one half heavily covered in minerals. I did a short rinse in vinegar to clean that off.
  20. Hey everybody! Welcome to my Mazon Creek thread, where I’ll be posting pictures of various Mazon Creek finds! I’ve been hunting there for upwards of 10 years, so I have piles of uncracked nodules just waiting to be opened. So as they open, they’ll find their way here! Feel free to jump in and add your own and keep this thread going! And I’m sure there are many that have gone unidentified, so I’ll probably need some help from the experts!
  21. Fossil hunting season at Illinois's Mazonia-Braidwood State Fish and Wildlife Area, the iconic Pit 11, runs from March to September every year. I didn't make it to the park at all last year, so I wanted to get out there on day 1 this year. I took the day off work and thankfully the weather cooperated- it was cloudy and in the 30s for most of the day. I picked up my rental car at 7:30 in the morning and hit the road for the 90 minute drive north. I wasn't the first one at the park, though- I saw a few other folks heading out on the trail with buckets in hand as I pulled into the parking lot off 5000 N Rd. Although I have been to Mazonia about 6 times in the last 5 years, I am still finding my way around the overgrown landscape of the park. I started out with an area I had been to before, and had some early success. Unfortunately, I followed that by wandering off to explore a new area, lugging my heavy bucket through heavy brush for 2 hours with almost no success. That (and the fact that I was in the early stages of a head cold) led me to taking it easy in the afternoon. I was only able to add a few more concretions to my bucket, but the sun did peek out briefly towards the end of the day resulting in some lovely panoramas from up on top of a ridge. I was able to chat briefly with another fossil hunter when I got back to the parking lot about the joys and tribulations of fossil hunting at Mazonia- we discussed the hard work necessary in order to have a chance to open an incredible window into a 300 million year old world, and how we wouldn't trade that chance for anything. I finished the day at the former tipple on the western side of the park, wide open ridges of dumped waste from the former mine that remain inhospitable to plant life to this day. It is an alien looking world, and usually has not been a great spot for finding fossils. However, it is easy to access at least and I was actually happy to come across a few rough bark impressions in sandstone that I picked up. The sun was getting low, so I decided to call it a day. I only collected about 1 1/2 gallons of concretions, but I was still glad I could get out to the park and find something. I will put my finds in the next post.
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