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Found 16 results

  1. Joseph Fossil

    Oglesby Unknowns from 7/16/2023

    Here are some more specimens which I quite frankly am scratching my head as to their identify! I'm also wondering if anyone can give a Proper ID for them? Unknown Specimen 1: Unknown Specimen 2: Unknown Specimen 3:
  2. On Sunday, I finally went again the Mazon Creek and later a Bond Formation rock formation of Pennsylvanian age, around 300 Million Years ago, in Braidwood, Illinois and Oglesby, Illinois with three friends after some scheduling adjustments. The trip was awesome and we collected a pretty impressive fossil haul. At Mazon Creek, We mainly hunted for fossils around the shores of local power plant cooling pond (which despite apparently having water temperatures that day of 100 degrees Celsius, still had a decent amount of birds resting on-top). We saw also a large rock pile on the other side of the lake, which we tried to get to on foot, but after an hour of walking decided to head back and try our luck next time. We then went to Oglesby. I'm still cleaning most of the Mazon Creek fossils, so for now I'll be showing my and my friends findings from the Oglesby site. It was pretty hot and got a little cut up on the rocks, but the fossil haul collected was awesome!!! Small jumping spider we found at the Oglesby site. A piece of either coral or Brachiopod one of my friends found in Oglesby. Anyone got an ID for this specimen? Pretty Impressive Crinoid Stems collected as part of the day's Oglesby fossil haul!!! But this next specimen is probably one of my favorites from this recent fossil haul. It's a partial Ctenacanthiform tooth tip (Possibly Gilkmanius sp.) on a limestone slab with some brachiopod fossils also attached (of which I put it recently under a dissecting scope). Based on the thickness and size of the tooth, the shark it came from must of been a pretty decent sized animal when alive!!! A pretty descent Neospirifer brachiopod specimen!!! This next specimen was truly an unexpected find for myself as I've seen a Ctenacanthiform tooth from the bond like this in person before (most I've collected and heard about are of a black coloration where this is a mixture of black, grey, and brown). I must say it's very beautiful and definitely from a Ctenacanthiform shark!!! But I'm curious as to what Ctenacanthiform species it could've come from? Any thoughts on its ID you guys?
  3. Joseph Fossil

    Trip to Oglesby 5/27/2023

    To really start the summer off well, I went recently to a Bond Formation rock formation of Pennsylvanian age, around 300 Million Years ago, in Oglesby Illinois with a few friends. The trip was overall good, though I almost fell off the rocks a couple times. It was a bit hot but overall I think I got a decent amount of fossils for the day. I found a decent amount of Crinoid stem fossils, of which here are a few of them: Found lots of what I think are Chondricthyian teeth (Chomatodus, Gilkmanius, etc.). But I would like help identifying them!!! Unknown Specimen 1
  4. I've been going through again more of the fossils I found with @Tales From the Shale on February 18, 2023 at a Pennsylvanian age, around 300 Million Years ago, rock formation in Oglesby Illinois. Their mostly small but I'm a bit curious on their species identities. I hope these specimens could be identified.
  5. Been meaning to post these photos a while back but got caught up with preparing for Spring Break. Here's some more fossils myself, @Tales From the Shale, and another friend found a few weeks ago at a Pennsylvanian age, around 300 Million Years ago, rock formation in Oglesby Illinois. I hope these specimens could be Identified properly. I have no idea what this specimen could be? Some brachiopod and possible Chomodus sp. bits I would like a proper ID for. Possible brachiopod? Possible brachiopod or shell crushing chondrichthyan tooth? I don't know what this is (maybe a part of a Ctenacanthiform tooth or part of a shell crushing chondrichthyan tooth)? Brachiopod specimen I would like a proper ID of.
  6. At long last, I've found it! The near holy grail of Ctenacanthiform fossils!! I have been a bit perplexed at the small Ctenacanthiform tooth myself and @Tales From the Shale found on February 18th at a Bond Formation rock formation. dating to around 300 Million Years ago in Oglesby, Illinois. The tooth specimen is only 8mm in length and I almost overlooked it until I put it under a microscope and dissecting scope. I initially thought it was Gilkmanius. But the medial cusp of the tooth is too narrow and curved to be Gilkmanius. I also thought it could be Heslerodus, but the tooth didn't exactly match the shape of Heslerodus teeth. Last week I checked with my old college Geology Professor (an experienced fossil hunter of the Mazon Creek area) and emailed scientists from the American Museum of Natural History, New York and the University of Chicago, Illinois about what genus the specimen belongs. The following ID the scientists said was a reasonable assertion and my Geology Professor was in no doubt of it...It is an actual SAIVODUS STRIATUS TOOTH!!! The dead give away for the ID was apparently the Sigmoidal profile on the side of the tooth! This is the first truly confirmed record of Saivodus striatus from the Bond Formation that I'm aware of!!
  7. I recently have been reanalyzing some fossils I found with @Tales From the Shale and another friend on October 8th, 2022 at a Pennsylvanian era roadcut in Oglesby Illinois! One of the specimens I had previously put under a dissecting scope, but was still unsure about its exact ID. I recently took a look at the specimen again a couple days ago and I believe its a partial tooth of a large ctenacanthiform shark. Here is the specimen under a dissecting scope! After a closer look, I noticed the parts of the tooth that could have connected to the medial cusp and lateral cusp on the left side of the tooth. For comparison, I compared the tooth to other Ctenacanthiform teeth, including cusplets section of the teeth (between the medial cusp and lateral cusp). The number of preserved cusplets on the tooth don't seem to match Gilkmanius (which usually doesn't appear to have cusplets between the medial and lateral cusps) or the other reported bond formation ctenacanthiform Heslerodus. The closet match was Saivodus striatus, but I'm not 100% positive on the ID. Below are some comparison images with a Saivodus striatus tooth. https://www.uky.edu/KGS/fossils/fossil-of-the-month_2022-07_Saivodus.php The first image here shows where I think the lateral cusps are (highlighted with green circles) on the specimen (not dissecting scope images). The second image shows where I believe the medial and lateral cusps would have been located (highlighted with green circles) with the right side being where the medial cusp was and the left side where the left lateral cusp was. Here are the same comparison images but with the dissecting scope. I'm sorry if some of the images are really blurry (still trying to fix my phone's camera). But what do you guys think? Do you guys know for the specimen what would be a good ID for it?
  8. I've visited the Pennsylvanian Bond formation in Oglesby Illinois a few times but have only found a few cladodont teeth so far! I find a decent bit of teeth from crusher plate chondrichyans like Deltodus, but I've also heard there have been some large cladodont teeth found in the area. I'm just curious what is the largest cladodont teeth found in Oglesby Illinois?
  9. During my trip to a Bond Formation Rock formation in Oglesby, Illinois on October 8th, 2022, one of the limestone blocks I found had a small reddish fossil sticking out on the side of the rock. It was about 2mm in length so pretty small. I thought it was interesting so I brought it back with the rest of the fossils collected that day. There was not a lot of room in my garage for the block so I put it outside on a supply bin for a while. The next couple of days, It rained ALOT. One day I remembered that the calcite in limestone dissolves in rain, so I went out that night to check on what could be revealed. I was pleasantly surprised at what I found! The rain had exposed more of the fossil to the surface. I believe it's a Chondrichthyan tooth or a piece of a brachiopod, but I'm not 100% sure so I was wondering anyone could give a proper ID for the specimen?
  10. Joseph Fossil

    Oglesby Fossil ID Part 3

    Not too long ago, I went fossil hunting with @Tales From the Shale and another friend at a Pennsylvanian roadcut in Oglesby, Illinois. We found a truly epic amount of fossils and I'm only now categorizing and trying to properly ID them. Here are a few I'm wondering if anyone would be able to ID? Some of the brachiopods I found there. This next one I am completely baffled as to what it could be? Maybe some part of a straight shelled nautiloid? I'm pretty sure this next one is a Chondrichthyan, but unsure on genus ID. Unknown Brachiopod about the size of a penny. Possible crusher plate about 2 mm. In length! Species ID unknown. Larger unknown brachipods. Possible penny sized worm imprints.
  11. Joseph Fossil

    Bond Formation Cladodont species ID

    Recently I went on a fossil hunting trip with a few friends to a roadcut in Oglesby Illinois from the Pennsylvanian Bond Formation. This was around July and I found a lot of cool Brachiopod fossils, but I decided a few days ago I wanted to get a closer look at some of the larger matrixes I collected to see if I missed something! At the very edge of one the matrixes, I discovered a small pretty exposed cladodont tooth that I couldn't find a specific ID of? The specimen is about 1/2 inch in length (5.0 mm.). But I wanted to see it a bit closer, so I put it under a microscope one of my college professors let me borrow. The specimen has a pretty slender shape overall and the top of the medial cusp appears to be broken off. I compared the specimen to other ctenacanthiformes from the Bond like Heslerodus and Gilkmanius. It does resemble Gilkmanius a bit, but I looked further and have drawn a slightly different conclusion - this could be a specimen of a juvenile Saviodus striatus. https://www.uky.edu/KGS/fossils/fossil-of-the-month_2022-07_Saivodus.php Like Saivodus, the Medial cusp is incredible slender for what's left of it. The Laterial cusps and cusplets on Saivodus teeth are much smaller compared to the Medial cusp than those of Heslerodus and Gilkmanius. On the microscope image, you can just barley make out a small cusplet next to the Medial cusp and a small Lateral cusp on the left side of the image (since under a microscope, it's actually on the right side of the tooth). Still, I'm not 100% sure my ID is correct. I was wondering if anyone is able properly ID this specimen? I'm also wondering if this cladodont tooth is indeed a specimen of Saivodus striatus or another member of the genus (which I would be awesome) or a a member of different Ctenacanthiform genus (which also would be awesome)?
  12. Tales From the Shale

    Oglesby Trip

    Does anyone know of the specific location of roadcuts in Oglesby Illinois? I heard of a large productive one, but haven't been able to locate it specifically. Thanks
  13. Before going back to the ESCONI Gem and Fossil Show, I decided to leave the house early and make the 75 minute trip to Oglesby, Illinois to a roadcut that I like to collect and was last there 19 days ago. This roadcut, exposes the Pennsylvanian LaSalle Member of the Bond Formation. Within those 19 days, portions of the head wall came down, dropping several thousands of pounds of rock. As I have stated in previous posts, this is not a road cut for younger collectors and people who are not sure-footed. Here are a few pics of the exposure as I found it this morning. This tree branch….. broke off of this tree after being hit but a lot of rock. The rock that I am holding broke off of the larger piece in the background during the fall. The large boulder in the left of the picture that has my Estwing stick on top fell all of the way down to the base of the cut. I am guessing that it is a distance of about 50+ feet. Here are a couple pictures of some of my finds. Three different species of brachiopods in this freshly freed piece. Here is my first Conularida and it is next to an inarticulate brachiopod. I will post a better pic at the end of the post.
  14. Since the weather was beautiful this morning after I did some rowing and grocery shopping, I decided to hit the Oglesby Road cut again. This cut exposes the Pennsylvanian LaSalle Limestone Member of the Bond Formation. This was another great day, I found another Petalodus tooth today, it is nice, but not as nice as the one I found last Sunday. I found a lot of huge brachiopods today after they popped out of the matrix. The exposure- Composita argentia Spiriferids- Neospirifer
  15. To day I decided to take a vacation day and stay around the house, but my wife told me that I was getting in her way and why don't I go fossil collecting. So with that, I was off on a 130 mile round trip to Oglesby, Illinois to look around at a road cut that exposes the Pennsylvanian LaSalle Limestone member of the Bond Formation. I have visited this site a number of times before and have prepared trip reports on my finds. I believe I say on every post that this is not a site for young kids and as adults you need to watch yourself for possible falling rocks or falling on the scree that is made up of larger pieces. In my opinion, this site is best visited in the early spring and late fall, when all of the vegetation is dead, it make foot placement a lot easier and really opens up the site, which is not very big. Shortly after I arrived at the site, another car pulled up and a man got out who identified himself as Roy Plotnick. The name was familiar to me, but I could not pinpoint where from, but I knew it was fossil related. Dr. Roy Plotnick is a Professor Emeritus from the University of Illinois at Chicago (Invertebrate Paleobiology and Paleontology), like me, he was just out for a day of collecting. We talked about several topics, including Mazon Creek fossils, and I had mentioned Richardson's Guide to The Fossil Fauna of Mazon Creek book and he stated that he authored the chapter on Eurypterids, and that was when it clicked where I heard his name. We both collected for about 1 hour and then we went on our separate ways. I did not find anything special today and to be honest, this was the least amount of fossils that I ever collected on a trip, here are some finds and pics of the area, Roy and one of me. I asked him to take a picture of me since I usually collect by myself and never end up in pictures. Roy Plotnick- Your's Truly- Pictures of the area- You have to watch out for the branches with the thorns on them, they are deadly. I found this cute little snake hanging around. Composita argentia- Linoproductus cora- Juresania nebrascensis- Crinoid discs- Hash Plate- Something odd and crystal filled, but think it is geological and not fossil. If I am wrong, let me know. I left this piece on site, but I know where it is.
  16. I knew it was going to snow today, so I thought that I would go out yesterday to a Pennsylvanian roadcut that has matrix from the Bond Formation exposed near Oglesby, Illinois. I did not spend much time there, put it was nice to be out. The area still has a lot of snow cover because it sits in the shade most of the day and there will even have more since we are getting 2-3”. Besides some brachiopods that I found, I also found this Cladodont Tooth that was on the bottom of a piece that I picked up. Though not complete, I still like it. Thanks to @deutscheben and @Peat Burns for the ID.
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