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Showing results for tags 'Carboniferous'.
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From the album: Steinbruch Piesberg (Osnabrück, Germany)
Sphenopteris artemisiaefolioides Crépin 1881© T.K.T. Wolterbeek
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From the album: Steinbruch Piesberg (Osnabrück, Germany)
Sphenopteris artemisiaefolioides Crépin 1881© T.K.T. Wolterbeek
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From the album: Steinbruch Piesberg (Osnabrück, Germany)
Sphenopteris artemisiaefolioides Crépin 1881© T.K.T. Wolterbeek
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The impact of the Serpukhovian extinction on Ctenacanthiform diversity
Joseph Fossil posted a topic in Questions & Answers
During the early part of the Serpukhovian stage of the Mississippian period, Carboniferous era around 330 Million years, a mass extinction occurred that wiped out between 13-39% of marine genera. Stanley, S. M. (2016, October 3). Estimates of the magnitudes of major marine mass extinctions in earth history. pnas.org. Retrieved December 30, 2022, from https://www.pnas.org/doi/10.1073/pnas.1613094113 McGhee, G. R., Sheehan, P. M., Bottjer, D. J., & Droser, M. L. (2012, February 1). Ecological ranking of Phanerozoic biodiversity crises: The Serpukhovian (early Carboniferous) crisis had a greater ecological impact than the end-Ordovician. Geology. Retrieved December 30, 2022, from https://pubs.geoscienceworld.org/gsa/geology/article-abstract/40/2/147/130800/Ecological-ranking-of-Phanerozoic-biodiversity?redirectedFrom=fulltext Its causes are still currently unknown and most marine genera groups recovered in the Pennsylvanian period. But I'm curious about the impacts this extinction event had on the diversity on Ctenacanthiformes and other Chondricthyian groups from the time and their subsequent recovery? What do you guys think? @Elasmohunter @Fossildude19 @deutscheben What do you think? -
Saivodus striatus and the Graham formation Gilkmanius: Which one was bigger?
Joseph Fossil posted a topic in Questions & Answers
The Ctenacanthiformes are an impressive group of prehistoric sharks, emerging in the Devonian period before surviving the two Devonian extinction events that gave rise to the Carboniferous. During the Carboniferous, the Ctenacanthiformes diversified rapidly, even becoming some of the Carboniferous Oceans Apex Predators. But of all the members of this impressive (yet almost unknown to the general public) group, two species stand out as especially impressive and awe inspiring - Saivodus striatus and the Graham formation Gilkmanius (this species currently doesn't have a name yet). Duffin, C. J., & Ginter, M. (2006). Comments on the Selachian genus Cladodus Agassiz, 1843. Journal of Vertebrate Paleontology, 26(2), 253–266. https://doi.org/10.1671/0272-4634(2006)26[253:cotsgc]2.0.co;2 Ivanov, A. O. (2005, September 1). The revision of "Cladodus" occidentalis, a late Palaeozoic ctenacanthiform shark. Acta Palaeontologica Polonica. Retrieved December 29, 2022, from https://www.academia.edu/49013029/The_revision_of_Cladodus_occidentalis_a_late_Palaeozoic_ctenacanthiform_shark Artist reconstruction of the skeleton and size of the Graham formation (Upper Pennsylvanian, Carboniferous) Gilkmanius sp. By J. Maisey. Image Source: https://www.amnh.org/explore/news-blogs/research-posts/ancient-supershark-fossils-found-in-texas Maisey, J. G., Bronson, A. W., Williams, R. R., & McKinzie, M. (2017). A Pennsylvanian ‘supershark’ from Texas. Journal of Vertebrate Paleontology, 37(3). https://doi.org/10.1080/02724634.2017.1325369 Artist reconstruction of an Adult Saivodus striatus and its size compared to an adult Human and adult Great White Shark (Carcharodon carcharias) by artist HodariNundu. Image Source: https://www.deviantart.com/hodarinundu/art/Super-Sized-Saivodus-866628428 Hodnett, J.-P. M., Tweet, J. S., & Santucci, V. L. (2022, August 8). The Occurrence of Fossil Cartilaginous Fishes (Chondrichthyes) within the Parks and Monuments of the National Park Service. researchgate.net. Retrieved December 30, 2022, from https://www.researchgate.net/publication/362806168_THE_OCCURRENCE_OF_FOSSIL_CARTILAGINOUS_FISHES_CHONDRICHTHYES_WITHIN_THE_PARKS_AND_MONUMENTS_OF_THE_NATIONAL_PARK_SERVICE Both were giant members of the Ctenacanthiformes and were on par in size with the largest Great White Sharks (Carcharodon carcharias) (which can reach lengths of 20 feet). But the question I have is which species was bigger (in weight and in length)? Which one was the biggest of the Ctenacanthiformes? @Elasmohunter @BobWill @connorp @deutscheben @jdp What do you think?
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- carboniferous
- gilkmanius
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I've heard recently that the Glen Dean Formation (Carboniferous) outcrops in Illinois are very fossil rich, especially with Invertebrates. However, I haven't heard much about vertebrate fossils coming from that formation. https://igws.indiana.edu/IGNIS/GeoNamesDetails.cfm?ID=805C6AF7-75E2-40C8-A8D2-C7535D35F7C8 Hoenig MMJ - MS Thesis - Chondrichthyan Diversity (Updated) (1).pdf Does anyone know what kind of vertebrate fauna (mainly fish) fossils are found at the Illinois outcrops of the Glen Dean Formation and if it's connected to the Burlington-Keokuk Fish Beds?
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Help identifying locations of Mississippian era formations in Northern Illinois
Joseph Fossil posted a topic in Questions & Answers
I've recently been trying to locate some new fossil sites (particularly those of Mississippian age) to go to and I found some places that might seem interesting. I found them looking at a slightly old geologic map of Illinois and I was wondering if anyone can tell me where exactly these locations are and if they are particularly fossil rich? https://www.mindat.org/loc-14607.html
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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?
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I was hoping to get some help identifying these bivalves. They were collected from Pennsylvanian (Desmoinesian) limestones in Illinois. They appear to me to be the same form, but I could be wrong. The shells are fairly featureless. The three specimens range from 0.5cm to 1cm in width.
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Largest Cladodonts found in the Bond Formation, Oglesby, Illinois
Joseph Fossil posted a topic in Questions & Answers
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? -
Tips for Fossil hunting in the St. Louis Area of Missouri
Joseph Fossil posted a topic in General Fossil Discussion
Recently, I've been thinking about conducting an exploratory fossil hunting trip in the St. Louis area of Missouri. I've never been there before, but I've heard there is a lot of caves and limestone outcrops near the city. I've also heard there is a decent amount of Ordovician and Mississippian fossils in the area. I'm just wondering if anyone's been fossil hunting in the St. Louis area before and what fossils can be found there? -
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!
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Strangely "Cooked" Bones From Carboniferous Lagerstätte Finally Explained (Ireland)
Oxytropidoceras posted a topic in Fossil News
Strangely Cooked Bones From 300 Millions Years Ago Can Finally Be Explained Michelle Starr, Nature, Science Alert, December 13, 2022 Ancient amphibians had their bones cooked, Trinity College Dublin The open access paper is: Gogáin, A.Ó., O'Sullivan, G., Clements, T., Hoare, B.C., Murray, J. and Wyse Jackson, P.N., 2022. Metamorphism as the cause of bone alteration in the Jarrow assemblage (Langsettian, Pennsylvanian) of Ireland. Palaeontology, 65(6), p.e12628. Yours, Paul H.- 2 replies
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- coal swamp
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Curious if anyone recognizes this. Looks floral but I don't recall having seen anything like it before. @Nimravis @stats @Mark Kmiecik @deutscheben @RCFossils
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This concretion opened up a couple weeks ago. When I first looked at it, I could tell there was something there, but the contrast between it and the surrounding matrix was very low, so I didn't think much of it. I got around to looking at it again yesterday. In very bright oblique light, I realized it was actually a very beautiful spider with legs and all. It measures about 1cm. I am not sure on the ID. Colors inverted
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- carboniferous
- illinois
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More Carboniferous flora from last weeks trips
oscarinelpiedras posted a topic in Fossil Hunting Trips
I recently went to a site in wich there are only one single specie, Neuropteris ovata. But Neuropteris ovata has many diferent shapes and sizes wich depend of the area of the frond wich the pinnules come from (Upper, lower, terminal, basiscopic, acutifolia zones, etc.) You can also find Cyclopteris fimbriata, that are big basal leaves from the frond. Upper Carboniferous of NW Spain. Here are some examples:
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From the album: Neuropteris ovata
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From the album: Neuropteris ovata
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From the album: Neuropteris ovata
© oscarinelpiedras
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- flora
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From the album: Neuropteris ovata
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From the album: Neuropteris ovata
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- carboniferous
- ferns
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From the album: Neuropteris ovata
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- pensylvanian
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From the album: Neuropteris ovata
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From the album: Neuropteris ovata
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From the album: Neuropteris ovata
