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Found 300 results

  1. dino poop?

    Found in Pennsylvanian layers; shale, mudstone, lignite, in Illinois; petrified wood nearby. Is this dinosaur poop?
  2. Mazon Creek Pit 11

    Next weekend we will be in Marblehead, Ohio visiting my sisters. I had hoped to stop at St Paul, Indiana on the way to look for some fossils. Unfortunately the quarry does not allow visitors at this point due to Covid. My thought then was to consider Mazon. About a month ago, a post was made similar to this one. It was suggested not to visit due to the ticks and other creepy crawlers. Are the critters still a problem??? Does covid close this park too?? I am all ears to suggestions. Thanks!! If this is not a good choice, there is always the go to Paulding, Ohio!!!! Mike
  3. Is it a tooth?

  4. oddball Pennsylvanian ?alga

    Anyone seen this species or similar? Found in Pennsylvanian spoil piles of central Illinois (near Peoria). Is it part of some kind of alga? Not my find and not my specimen, so these photos are basically what we have to go on. More broadly, can anyone here recommend a Treatise-style taxonomic book detailing known algal heads / macroalgae in the fossil record? Thanks.
  5. Pennsylvanian unknown microfossil

    I found this small specimen while splitting some Pennsylvanian black shale today. As usual, I'm not sure what it is. Looks like a jaw to me but I really don't know. It measures about 5mm long. Any thoughts? @jdp @RCFossils @deutscheben
  6. Pennsylvanian Plant ID Help

    These fossils were found in Westville, IL (Vermillion County) a long time ago by my great grandfather (the grey/black fossil; he worked in the coal mine), and my dad (the light brown/reddish one; on a slag heap). After reading this Publication Title: Guide to Pennsylvanian fossil plants of Illinois Publication Type: Geoscience Education Series Author: James R. Jennings Year: 1990 and looking at a number of photos for comparison, I am wondering if these are Alethopteris sertii? (other guesses are Neuropteris and Acitheca). At least that is my (un)educated guess after desperately trying to make sense of the Jennings paper. Also, on the first photo within the green box I noticed that the foliage has two different looks to it. Were the individual leaves (?) different or is this a result of the way the plant was fossilized? I appreciate all corrections and additional knowledge/comments on these two fossils. This forum identified a nautiloid I have, and I am so appreciative of the feedback and support you give!
  7. Pennsylvanian black shale unknown

    I found this while splitting some Middle Pennsylvanian black shale (Carbondale Fm) today in Illinois. It certainly looks fishy, but I haven't seen anything like it before. Any ideas?
  8. This concretion came from a Pennsylvanian Shelburn Formation site in Vermilion County, Illinois. The fossils are found scattered throughout concretions in a shale layer and indicate a near-shore marine origin, with the most common fossils being tiny to small bivalves, gastropods, goniatites and inarticulate brachiopods, along with occasional plant material. This one has me puzzled though. The concretions don’t split neatly like those from Mazon Creek, so unless the specimens were already exposed by weathering in the field I just smash them and hope it exposes a fossil. This is the only one that looks like this, showing a jumble of negative impressions of organic shapes, some of which are reminiscent of ribs and vertebrae. I can’t make out anything definite, though, so it may just be a suggestively preserved plant or crinoid, or who knows. The section with impressions is about 20 mm wide. Thanks!
  9. Isolated Pennsylvanian micro tooth

    I found this teeny tiny tooth when I was smashing some matrix from the Pennsylvanian La Salle Limestone. It’s about 2 mm tall and has a shiny tip and more matte “root”. Since this is a marine deposit my assumption would be that this is a fish tooth, but is it possible to identify it any further? Here it is on the matrix: and here is the tooth itself:
  10. Fossil skin?

    Hi. First time poster here. I found this in my rock beds surrounding our foundation. We did not order these rocks, so I'm not 100% certain where it might have come from. I'm in central Illinois. I'm really just interested in knowing what it is. Thanks for any help!
  11. Mazon Creek plants

    These two Pit 11 nodules popped over the past couple weeks. I haven't found anything similar to either in the past, so I'm hoping for a bit of help. #1)
  12. Hey guys! It’s been a while since I’ve been active, it’s good to be back My roommate and I took a trip out to Oglesby, IL today for his first fossil hunt! We found some nice brachiopods, but the absolute winner for me were two associated shark teeth (I think). It might be a cladodont, but sharks are really out of my spectrum, so if anyone could help I’d be quite appreciative! Oglesby, IL LaSalle Limestone Member Bond Formation Carboniferous, Pennsylvanian Tooth 1 Tooth 1 wet Tooth 2 Tooth 2 wet
  13. Last weekend I decided to take a short drive to Vermilion County, IL and get outside for a little bit. I haven’t been able to do any fossil hunting since COVID-19 reached our shores, so I had a few iffy sites less than 40 minutes from home in mind as I was driving. The first two proved fruitless, but I decided on a whim to take a new road over a local river in hopes of finding some exposures there. The river was running high with verdant growth all around and dragon and damselflies filling the air. As I looked down from the bridge I saw sandy shore, concrete bridge abutment, and then a small section with some intriguing rocks scattered along the river’s edge. Once I made my way down to river level, I found that the black rocks visible above were pieces of black shale and coal. I was excited! I had been thinking of black shale since collecting some on an ESCONI trip last year and reading @connorp’s posts about black shale finds. This shale was much more fragile and bedded than the Mecca Quarry Shale I found last year, so I was able to split it easily by hand. I was too excited, so I forgot to take any in situ photos (I took the ones above on my way back to the car). Before too long, I spotted the unmistakeable shape of a dermal spine from the iconic black shale chondrichthyan fauna Listracanthus hystrix- a strange shark relative covered in spiny denticles. I spent about 30 minutes searching this small exposure and turned up several more Listracanthus, the inarticulate brachiopods Lingula and Orbiculoidea, fish scales, and some mysterious spine fossils. Unfortunately, almost everything was tiny (less than 1 cm) and I don’t have a macro lens for my phone yet, so photos of most of them will have to wait. Here is everything I kept after trimming the matrix down: I will share some more pics of the best Listracanthus in my next post.
  14. Burlington limestone fossil IDs

    Hey all, hope it's ok to do 2 for 1 here. Both of these were found in a creekbed in Pike County Illinois while hunting for chert in the Burlington limestone formation. The first looks like urchins I've seen from other places but with a lot less detail. Possibly a crinoid impression below it. The second I don't even know where to start. It's a split rounded cobble with....something going on inside it. Mostly used to finding crinoids and horn corals in the area so these really took me by surprise. Thanks for looking.
  15. Mazon Creek Plant ID Help

    5 plants I need help with. 1) 2) 3) 4) 5) 3 & 5 look to be the same species. Number 4 also appears to have 2 separate plants on it but am not 100% confident. Thanks for the help!
  16. This weekend, I have to drive up to Michigan to finish moving out of my apartment since I graduated, so I thought I would hit up a couple spots along the way. I'll hopefully have plenty of pictures to post here, but my fossil-filled week began earlier than expected so I'll start with that. I couldn't sleep much yesterday and ended up getting up way too early, so I figured I would go check out a Middle Devonian spot (Milwaukee Formation) in SE Wisconsin. I think this spot is pretty well known, so I wasn't expecting to find much. The fauna is pretty similar to what I find in the Silica Shale in Ohio but not as well preserved, so I didn't collect that much as I will be hunting the Silica Shale this weekend. The location is quite scenic, and I spent a lot of my time hiking the trails. Along the trails are a few outcrops, including one that appeared to only have been recently exposed from a tree falling. Unfortunately, most were poorly fossiliferous at best. It seemed like a lot of fossils were concentrated in what are perhaps storm deposits, but these were in the middle of massive dolomite beds and were not worth the effort. I only found one outcrop that was really worth exploring. I think only surface collecting is allowed, not that I would want to bust out a sledge next to hikers and fishermen anyways. The best collecting seemed to be from the more fossiliferous Lindwurm member. The underlying Berthelet is much more thickly bedded and formed a natural ledge for the Lindwurm to collapse onto.
  17. Me again

    Hi it's me again. I'll be asking for help a lot. Found in metro east Illinois. TIA
  18. Me again

    Hi it's me again. I'll be asking for help a lot. Found in metro east Illinois.
  19. My current favorite

    Found in Illinois near st Louis.thanks for your help!
  20. Found a number of fossils today along a bank of the Middle Fork Vermilion River near Oakwood, IL. There was a long coal seam (see 1st picture) with lots of fossils and concretions sticking out above and below, and nearby on the ground. I'm fairly new to fossil hunting, but I've taken some guesses on what these are. Looking forward to see what you all think Coal Seam #1 - Huge piece of what looks like fossilized wood? Was very heavy #2 - Calamites? #3 - Fern-like, not sure #4 - Not sure. Scaly part makes me think it's coral shell or something, but the rest is clear like quartz with some iridescence inside. #5 - Looks like a fossilized charred pointy piece of wood? #6 - Maybe coral with red spots. Translucent/pink on the inside #7 - Some sort of space peanut? Coprolite? Iron Slag?
  21. Sponge? Anemone?

    Found this peculiar pattern on a rock containing other fossils from Northern Illinois, from the Silurian period best I can figure. Haven’t seen the like before. Anyone know what it might be?
  22. Hope you can help! Thanks

    Hope you guys can help found in Illinois in a creek. Southern Illinois near st. Louis
  23. Unknown Maquoketa Trilobite

    Found this while splitting some slabs I brought home from an outcrop of the Maquoketa Group (Upper Ordovician) in Illinois. Started a bit of prep work but figured I'd try to see what I'm dealing with before going any further. My completely uneducated guess would be a lichid pygidium or something of the sort?
  24. Pennsylvanian bivalve, Dunbarella?

    Bivalves always challenge me. If the ear (is that the right word?) on the left wasn't present, I would have called this Dunbarella sp. But the rounded ear doesn't match any species of Dunbarella I've seen. Maybe another genus, like Aviculopecten? Not sure. From Pennsylvanian black shale in Illinois. Thanks for any help.
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