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Found 15 results

  1. This is not about the identification of a fossil (it's an Asineopps squamifrons) but about the identification of a quarry unknown to me. I received two Asineops squamifrons from a friend, unfortunately without a location (he received it as a gift, the fish themselves are not very well prepped). What irritates me is that the rock doesn't look like Green River Formation at all - at least not like the rocks I have encountered in the quarries around Kemmerer. The rock is relatively fine-grained and very dark, almost black, and probably has a high organic content. The two Asineops in it also look almost charred. I've only dug once at Lake Gosiute sites (Currant Creek Ranch), but I don't know of any dark rock like this from there either. And it doesn't look like Farson either. I am at a bit of a loss. Can anyone give me a hint as to where this slab could be from?
  2. Location: Warrensburg, Missouri Period: Pennsylvanian Formation: Unknown Hello! I happened to have had an opportunity to visit land owned by one of my friends and decided to split some of the black shales. I happened to come across something that seems familiar but I just can't seem to place a name on it as of yet. So far I have found 2 specimens, and I'm not sure if one is just infilling of the original mold or something other. Unfortunately they were in already weathered sections of shale and I could not retrieve the other halves of the shales. In case it helps with identifications, I have found listracanthus denticles, conodont elements, very faint orbiculoidia? shells/fragments, and some nodules that were not compacted enough for me to take thin sections of. Specimen #1: What appears to be a mold of the specimen. Very faint shell fragments are visible to the right and upper portion form the specimen Specimen #2: And lastly for anyone who is interested, here are images of the conodonts! Another conodont tooth fragment seen on the left side: I didn't do any size measurements on the conodonts or use the CAI to determine anything as I'm not experienced in the later but would love any input! Thanks for taking time out of your day to read all this!
  3. bluegilldvm

    Grundy County Black Shale

    I found these while splitting some black shale collected at a private club in Grundy County. The first 3 pics are of one specimen and the last 2 are of another specimen but not as well preserved. Thanks.
  4. tomdonohue1

    Allegheny Fm. Plant Fossil ID Help

    Looking for some ID help on this plant fossil. Found in black shale in the Allegheny Formation (Pennsylvanian age) in western PA (Lawrence Co.) The fossil is approximately 3" long.
  5. bluegilldvm

    Unidentified structure

    Black shale collected at a private club. I’m not sure just a linear artifact of the shale or a linear structure of something.
  6. Hello! I was making some thin sections of some material from the Excello shale and found a very large and bizarre structure. Sorry in advance it was too big for my microscope camera to really capture it all, but here is the specimen in question its most likely coated in apatite/phosphate? along with small radiolarian/sponge spicules surrounding it I sent a photo to my professor and he said it could be something new but he would have to see it in person (he is an expert in Radiolarian microfossils) I wanted to post it here and see if anyone had any ideas to throw out. Here it is under 4x power (it is still a little bit of a "thick section" rather than thin section but I plan to grind it down at another time) I don't think it is a radiolarian (unless it is a ginormous one) as the largest I have found from the Excello was about 1000 microns Here is the largest one I can confirm is a Radiolarian (Entactinaria sp.?): Bonus Rad that shows possible apatite/phosphate coating in more detail (old photo) Let me know if you guys have any suggestions or questions let me know and Ill try to aid in any way I can.
  7. 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 bivalves, brachiopods, cephalopods, and shark teeth and scales. The underclay also contains petrified and pyritized wood and root traces. About 30 of us gathered at a nearby McDonalds before heading to the pit- dark clouds on the horizon brought intermittent hard rain that kindly let up by the time we reached the pit floor. My interest for this trip was in the black shale, with hopes of finding shark material in particular. With the recent rains everything was muddy, and the black shale could be found in chunks strewn along the slumping highwall. Some folks were splitting the shale, but I did not have any luck with that-all of my finds were already exposed. The mud really made it hard to see whether or not there were fossils in the exposed black shale, but I was happy to be able to find a few pieces worth taking home- as often seems to be the case for me when fossil hunting, I found my best stuff in the first hour and virtually nothing the rest of the time I was there.
  8. 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 present, disarticulated and scattered fish remains. I have also found frequent inarticulate brachiopods, one piece of woody material and a few small poorly-preserved spiral shaped invertebrates- they could be gastropods or Spirorbis. In this thread I’ll be sharing my finds from the above-mentioned site, as well as any other ones I may find in my explorations in Illinois and Indiana.
  9. Howdy all, I did a bit of fossil hunting in Fayetteville AK over Thanksgiving, hitting the Mississippian age black shale the area is famous for, looking for goniatites and any other ammonoids or nautaloids I could find. These concretions were dug out of the lower unit shale and many of them were large, extending over 4ft in length, flat, with an oblong appearance. This was on the surface of a concretion and unfortunately was exposed to weathering and moisture. Not sure what that is. This little guy, it’s just provided for grins and not requesting an ID. It’s way too small This is the main fossil I’m concerned with ID’ing. When I broke the concretion, it split revealing a horizontal cross section of an ammonoid. I have both halves and it appears to be potentially well preserved. I’m attempting to prep it but it’s been a real struggle due the siderite that makes up most of the mineralization in these. It shines like metal when it’s cut or ground with a diamond bit making it very difficult to make out features and details. It all just looks like a shiny metallic mess. To complicate things further, many of the fossils are pyritized. I’m sticking to mineral oil only when slabbing and making large cuts. Oil causes the dust to clump and build up further obscuring things. Im also having to wear a respirator to avoid breathing this dust and it makes a nasty mess. It’s a total pain but it’s worth the hassle to get one well preserved ammonoid, even if it’s small. I’m curious if anyone has ever worked with this shale and if any tips can be provided. I’m only attempting this kind of prep once as an experiment. If it works, I’ll do the same with the other half and glue the halves back together. Im leaving enough matrix on the bottom to provide a base to stand it upright and only removing matrix from the dorsal side. I have no clue if this will work or even how much of this thing is preserved. When slabbing excess matrix off I found a second Ammonoid below it that appears completely pyritized, though less well preserved. It’s the piece on the left and the rest of it is under the fossil on the right. Note that it’s cut like a vertical cross section and not proportionally. Any assistance or info is greatly appreciated. I realize that a definitive ID may be impossible without exposing the dorsal side and it’s sutures.
  10. bluegilldvm

    Black Shale from Illinois

    This was collected at a private recreation club west of Pit 11 from old spoil hills. I have found Listracanthus spines from this type of black shale. I’m not sure if this is a large spine or something else. Thanks
  11. bluegilldvm

    Illinois Black Shale

    This is black shale from southern Grundy County, Illinois from a private rec club found in the spoils hills throughout the club. I have found a few listracanthus spines and numerous bivalves from this area. I am unsure as to what these structures are but thinking a type of mollusk or ammonite. Pics 1-3 is one fossil and pics 4 and 5 is another fossil. Thanks
  12. 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.
  13. Bonehunter

    shale limpet?

    So, while looking for shale that may have plant imprints (nadda ) or conodonts (also nadda ) and finding absolutely nothing splitting open countless layers (I wanted to make the shale layers in Kansas City look uniform so I've separated all of them for future fossil hunters ) I came upon this single fossil. To me it reminds me of modern-day smooth shelled limpets. This black shale layer was between winterset limestone and Sniabar limestone layers in Kansas City (from R. Gentile). It is about 3/8" long by 2/8" wide and a little over 1/8" thick-two different "lightings". Thoughts, as usual, much appreciated! Bone
  14. RCFossils

    Pennsylvanian Aged Mystery Fossil

    This is a very odd fossil that I collected from a Pennsylvanian aged black shale site in North Central Illinois. i have been collecting this site for many years and have never found anything like it. The specimen measures approximately 3”. The site primarily consists of a Thylacocephalan type arthropod along with a variety of fish and a few nautiloids. it is very similar to the Mecca Quarry Shale of Indiana. My best guess is that it is some type of nautiloid or possibly a spiral coprolite. Any suggestions would be appreciated.
  15. Here are a few things I would love to know what they are: #1 Black shale that we used years ago to make a decorative siding for the barn, what are those shallow pits? This rock is about 7 inches long. #2 This came from a different area in the Eastern Panhandle that was near a large creek. #3 Same thing as #2? Thank you for your help!
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