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  1. I've recently been looking over the geologic formations in Illinois and I found one that's a bit interesting - it's a Cambrian period outcrop but it seems to be a bit small, only found in parts of Ogle and Lee County, Illinois. http://ebeltz.net/firstfam/1stfam.html https://www.osti.gov/servlets/purl/1202269 https://ilstratwiki.web.illinois.edu/index.php/Cambrian_System I haven't heard of a lot of fossils coming from this area so I'm wondering if anyone's been fossil hunting in that region of Illinois before and how common are Cambrian Fossils fr
  2. Runner64

    Mazon Creek Collection

    I'll update this thread with my Mazon Collection over the next few weeks. With some good weather out yesterday, I managed to get my first fossil hunt in for the season and will post a report in this topic. I will be moving this upcoming summer which will put me even further from Mazon Creek so I have purchased a few pieces to fill in the genus/species I haven't found yet and will mention if I purchased a fossil. I still hold out hope to find some of these pieces I purchased eventually but will realistically be difficult if I only can make 1 trip a year. Fauna Tullimo
  3. connorp

    Mazon Creek - fern or wing?

    I spotted this on the outside of a concretion this week while sorting some buckets. It looks to me like it is possibly a wing, but it's pretty water worn so it could also just be a suggestively worn fern pinnule. I was hoping for a second opinion. @Nimravis @stats @deutscheben @RCFossils @Mark Kmiecik @flipper559 Thanks. A couple shots under a microscope.
  4. Today I woke up at 6:30 am and drove 105 miles (one way) to Freeport, Illinois to visit the Northwest Illinois Rock Club Show. This is a very small / local show that is held at the Eagles Club. The show opened at 9:00 am and I was out of the show before 9:30 am. Unlike last year, there was not much in regards to fossils. This show runs through Sunday and is 95% rocks and minerals. Heading out there this morning, I ran into a snow flurries, as it was 33 degrees and I also saw a rainbow. Here are a couple pics of the show. Since it was cold and early, there
  5. connorp

    Mazon Creek unknown

    This concretion opened up tonight. I'm not entirely sure what it is. I thought it might be a cross section of a small bone, but I could also seeing it being some weird pyrite formation - the site that this was collected at produces a lot of those. Any thoughts? A couple shots under a microscope.
  6. I collected this fern from the Middle Pennsylvanian of eastern Illinois. It is not a form I recognize. Do any of the plant enthusiasts here have any thoughts?
  7. connorp

    Mazon Creek Coelacanth scale

    I had this concretion open today. I immediately noticed what I believe is a coelacanth scale, but on closer inspection there looks to be some other bits that might be related. Any thoughts? @jdp @RCFossils
  8. The Lone Star Quarry in Oglesby, Illinois is now part of the adjacent Starved Rock and Matthiessen Park. A Fossil Park for Illinois by Roy Plotnick https://medium.com/@plotnick/a-fossil-park-for-illinois-4c2cb44af2e9 Matthiessen — and Starved Rock — just got a lot bigger (VIDEO) DNR increases parks by 55 percent after $11 million deal with cement company By Tom Collins http://www.newstrib.com/free/matthiessen-and-starved-rock-just-got-a-lot-bigger-video/article_203e37f8-d89a-11e8-9a7e-e72ef52ec0d6.html A web page about other fossil
  9. connorp

    Mazon Creek millipede?

    I had this Mazon Creek concretion open today. It was collected from the Braidwood biota (freshwater/terrestrial). My best guess is a partial millipede (Amynilyspes?) but I'm not sure and wanted to get other opinions. Thanks for any help. @Nimravis @deutscheben @bigred97 @RCFossils @stats @flipper559 @Mark Kmiecik
  10. Yesterday I went on a combined field trip with ESCONI and LOESS to the Starved Rock Clay Products pit in Utica, Illinois. ( @connorp was there too!) This open pit exposes the Pennsylvanian Mecca Quarry black shale, Francis Creek shale, Colchester Coal, and an underclay below the coal- an assembly of strata that have produced world-renowned fossils elsewhere, including Mazon Creek fossils further east and complete sharks from the Mecca Quarry Shale in Indiana. At this location, unfortunately, the concretions are almost all blanks but the black shale does produce isolated fauna including bivalve
  11. I've been looking at the records of the Carboniferous Eugenodontid Chondrichthyan Edestus in Illinois (famously referred to as the coal shark) in Illinois and I've found that there are a large amounts of reports from Underground mines at Sparta and Coulterville, Randolph County Illinois. I also found a record from fossilworks.org simply listed as "Coal mines of western illinois" at the coordinates 38.7° N, 90.0° W. http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&taxon_no=34453&max_interval=Carboniferous&country=United States&state=Illinois&am
  12. Tales From the Shale

    Oglesby 10/08/22

    This Saturday I went over to Oglesby again joined this time by fellow user @Joseph Fossil. We hunted for about six hours straight, the trip being the most productive I've had here. I showed him and his friend what to look for when searching for Chondricthyan teeth. Joe collected 2 Cladodont teeth, and we both walked out with two partial Petalodus specimens. Here's a very complete Echinaria. Neospirifir dunbari, they'll look nice when prepped and put back together. An Antiquatonia portlockianus Linoproductus cora A pair
  13. 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
  14. 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
  15. vja


    I found this on Sunday, Oct. 2, 2022, open, in the Mazon River. I am wondering if it is a fiddlehead, or "birth-of-a-fern" It came from an area of the creek where the concretions seem to be heavy, and iron laden, so I am concerned that it may eventually disintegrate from "pyrite " disease, so I wanted to share it while it still exists! Any help will be appreciated. Thank you!
  16. deutscheben

    My Mazon Creek Finds

    I will be using this thread to post what I have found fossil hunting in the Mazon Creek area, including the ESCONI Braceville pile, Mazonia/Braidwood, and any other sites I get a chance to explore. Although I had been to Mazonia a few times previously with virtually no luck, my first successful trip was with ESCONI last September at the private spoil pile they have access to. These first fossils are all from there. I have tried to give the best IDs I can- please jump in if you think I have anything wrong. I also forgot to put something in for scale on this first batch of photos, my apologies.
  17. Hello. I recently acquired a fairly high-quality Edestus specimen (9 inches long; with two 'complete' teeth and two partial teeth). Location: Lively Grove, Illinois. However, when it arrived I immediately noticed an artificially added dark-purple colored type of "stain" material that is covering significant parts of several teeth. (Please see attached photos). I know that it's common to glue the entirety of Edestus fossils owing to the materials' fragility, but I've never encountered an additional 'stain' like this. Notably, the enamel looks a bit 'restored' in
  18. Last summer I posted a trip report about finding some Pennsylvanian black shale in a river bed in East Central Illinois http://www.thefossilforum.com/index.php?/topic/106753-628-illinois-black-shale-trip-w-listracanthus/. I was able to visit the site again once more in the fall last year when the river was running much lower and collect more and larger pieces of the finely bedded and fissile shale. Since then I have been slowly splitting and going through the rocks I brought home, and finding many interesting fish parts- that is definitely the dominant fauna presen
  19. This evening I had a little bit of time to do some collecting. It was not my best day, but it was still enjoyable. Here is a large Annularia, I was tapping the “crust / outer shell” off of the concretion, and it split open. Also found a nice Lepidostrobophyllum majus. And I am thinking that this is Sigilaria. Here are some concretions as they were found. Sometimes you find concretion
  20. Tales From the Shale

    Oglesby Highlights

    It's been a busy summer out here in Wisconsin, but fortunately I was able to make multiple trips out to Oglesby in Illinois. Here were some of the top finds. Perepristis semicircularis, found on my second trip. The chip on the top was from my unlucky Dremel stroke. The white dots on the left are not damage, but tooth coloration. My first and only connularid, of unknown affinity. I'm pleased to have this despite it being fragmentary. What I believe to be an ameura trilobite pygidium, nicely preserved. Composita argentia found a ton of these, but this
  21. connorp

    A couple Mazon Creek Flora to ID

    Here are two new Mazon Creek finds I'm not positive on. This first one looks very familiar but I can't place it. The second is a nice 3D piece of wood. My best guess is a Psaronius stem (tree fern), but I haven't found anything like this before so I was hoping for a second opinion. @Nimravis @stats @Mark Kmiecik @deutscheben @RCFossils I appreciate any help.
  22. Runner64

    MC 00001 - Astreptoscolex anasillosus

    From the album: Mazon Creek - Fauna

    Species - Astreptoscolex anasillosus Location - Mazonia-Braidwood Wildlife Area Formation - Francis Creek Shale
  23. connorp

    Mazon Creek Flora

    I've been spending a lot of time lately studying the Mazon Creek flora, and am continuously astonished by the diversity and quality of specimens that can be found. I don't think we see enough plants on the forum, so I figured I would go ahead and share some of my favorite finds. First is a specimen I recently shared, and a fitting start to the thread. This is Crenulopteris acadica, the most common true fern found in the Mazon Creek flora. It has been the most common plant I find, accounting for probably half my finds. Next is a favorite of mine. This is a s
  24. Tales From the Shale

    Oglesby Tooth?

    Found this in the Oglesby roadcut yesterday. Age: Pennsylvanian Formation: Bond I only partially revealed the object, it was much smaller initially.
  25. Tales From the Shale

    Oglesby Roadcut

    Went to Oglesby Illinois to explore a well known site last weekend. Took me awhile to partially scrub and organize these individual specimens. Some Composita brachiopods? Can't remember for sure. My favorite find (looks better in person) someone must have tried to bash it out of the rock, as it has damage from a hammer, when I had found it in the matrix. I think its a Neospirifer, and quite large at that. Shame it has that shell damage but still great regardless. And then finally these very co
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