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Showing results for tags 'permian'.
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As we all know, the trilobites were on their last proverbial legs coming out of the end-Devonian extinctions, their numbers having dwindled to a lone order, Proetida. I haven't seen a lot of talk about these last few survivors of the trilobite lineage, so I wonder how many of us have one of these survivors! I personally don't, but I'm interested to see the forum's contributions!
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Hi all, Been eyeing up this item online. Advertised as species Apateon pedestris. I thought it would be best to ask for some opinions before dropping money. I think it looks pretty nice, and at a good price. I like that it doesn't have the preservative applied to mimic skin impressions (like the majority do) but I wonder if the ID is accurate (or if it's even legit.) I'd love to add more amphibian material to the collection and I think this might be a good choice. Thoughts?
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Pictures first, full descriptions will follow Paleozoic Sharks and “Sharks”
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Super Computer Analysis of Species Helps Define Mass Extinctions
Scylla posted a topic in Fossil News
Looking for hidden mass extinctions in the fossil record. Big data comes to paleontology https://www.nature.com/articles/d41586-020-00117-1- 2 replies
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Were the cephalic spines of Xenacanthid sharks venomous
Petalodus12 posted a topic in General Fossil Discussion
Hi all, I have seen and heard from multiple different sources that the cephalic spines of Xenacanthid sharks are considered to have been venomous. This is usually supported by the serrated nature of these spines and a canal that runs down the middle of them. Has any research been done to prove or disprove this hypothesis. I know that we can never know for sure but I am curious if there is any scientific support to these claims. Thanks in advance, Zach -
Hello everyone, I have been looking to do a bit of practice drawing and I thought why don't I try to reconstruct an animal from my fossil collection, I decided Apateon pedestrian should be fairly simple so I went with that. So far I have looked over different fossils and skeletal diagrams and tried to compare them to modern amphibians. One thing from my research that has been very inconclusive though is the skin pattern and texture of the animal. One source states that they had a regular mosaic pattern of scales which is possible considering other temnospondyls but when looking into it more the only thing I could find is another branchiosaurid, Melanerpeton which was found with a pattern on its skin although here it said nothing about scales. Does anyone know where I could find out about what they really did look like, or should I just base it off of what we know about the other branchiosaurid?
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Hello everyone, I working in dimension stone field in Armenia. This fossils where found in a sample small stone block brought for cutting to the factory, then they were machined polished as standard marble or granite tile. The tile (second photo) is 400x800mm app.16x32 inch. Kindly help me to identify these guys. Thanks
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Does anyone know of anywhere that sells anything from the Permian extinction layer? I have matrix/micro glass beads from the KT boundary layer, but I can’t find anything like that from the Permian/Triassic boundary layer, but I can’t imagine there just wouldn’t be anything for sale anywhere, so I was wondering if anyone could point me in the right direction. I’d be curious about remnants of any extinction, but I’m specifically interested in anything Permian extinction.
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Three bone like 'fossils' found together, any idea what they may be?
tritonpolaris posted a topic in Fossil ID
Hello, I recently found these three items in Custer County Oklahoma where Quaternary mixed with Permian and Cretaceous bedrock can be found. They were all found about 5 feet from each other with items one and two on top of each other. When I hold them they remind me of a terracotta pot in texture and kind of sound like terracotta when you tap on them. I am guessing they are fossilized bone? If it is bone I would love to figure out what it came from but understand that determining exactly what it was from may be difficult. I appreciate any input on what they could be and would also understand if its too difficult to determine. Below is item one, kind of flat.. Maybe a Skull?
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Siberian gas venting and the end-Permian environmental crisis
Oxytropidoceras posted a topic in Fossil News
Below is an interesting paper, with PDF files online, about the role of contact metamorphism of evaporites and organic rich strata by the Siberian Traps and the end-Permian extinctions. Svensen, H., Planke, S., Polozov, A.G., Schmidbauer, N., Corfu, F., Podladchikov, Y.Y. and Jamtveit, B., 2009. Siberian gas venting and the end-Permian environmental crisis. Earth and Planetary Science Letters, 277(3-4), pp.490-500. http://folk.uio.no/hensven/Svensen_EPSL_2009.pdf https://henriksvensen.wordpress.com/publicationspapers/ https://henriksvensen.wordpress.com/page/2/ Some related papers are: Burgess, S.D., Muirhead, J.D. and Bowring, S.A., 2017. Initial pulse of Siberian Traps sills as the trigger of the end-Permian mass extinction. Nature Communications, 8(1), p.164. https://www.researchgate.net/publication/318793382_Initial_pulse_of_Siberian_Traps_sills_as_the_trigger_of_the_end-Permian_mass_extinction https://www.researchgate.net/profile/Muirhead_D https://dspace.mit.edu/bitstream/handle/1721.1/113600/s41467-017-00083-9.pdf?sequence=1&isAllowed=y Polozov, A.G., Svensen, H.H., Planke, S., Grishina, S.N., Fristad, K.E. and Jerram, D.A., 2016. The basalt pipes of the Tunguska Basin (Siberia, Russia): High temperature processes and volatile degassing into the end-Permian atmosphere. Palaeogeography, Palaeoclimatology, Palaeoecology, 441, pp.51-64. Svensen, H.H., Frolov, S., Akhmanov, G.G., Polozov, A.G., Jerram, D.A., Shiganova, O.V., Melnikov, N.V., Iyer, K. and Planke, S., 2018. Sills and gas generation in the Siberian Traps. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376(2130), p.20170080. https://www.researchgate.net/publication/327404155_Sills_and_gas_generation_in_the_Siberian_Traps https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6127383/ https://www.semanticscholar.org/paper/Sills-and-gas-generation-in-the-Siberian-Traps.-Svensen-Frolov/6d0e86fcd2beea7d96c4e15240e50650c2ac235a Rampino, M.R., Rodriguez, S., Baransky, E. and Cai, Y., 2017. Global nickel anomaly links Siberian Traps eruptions and the latest Permian mass extinction. Scientific reports, 7(1), p.12416. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5622041/ http://www.indiaenvironmentportal.org.in/files/file/Siberian trap eruptions.pdf Yours, Paul H.- 1 reply
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I have recently received this Palaeoniscus freieslebenensis from @Strepsodus, and it has some kind of coating around the fish, the matrix is slate and I would prefer to have it without this coating but I don't know if I can remove it, and even if can should I do so or would that risk the integrity of the fossil?
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Hello all. I picked up this fossil in a Permian formation on the Potash Road, unpaved section, SW of Moab. I think I can eliminate what it is not but am unsure of what it is. I do not think it is some kind of sponge. It does seem to have the structure of coral. It does not it seem to be like any bryozoan clusters I’ve seen. If that is correct, this begins to narrow it to bacterial. The fossil material is very thin overlaying a hard red clay base, so I don’t think it is a stromatolite. It does not come in layers, but seems to be just one layer. The piece is 4cm x 4cm x 4cm. The fingers in the third picture give a good sense of scale. The most distinctive feature is the tooth like ridge just to the left of the red dot in the first picture. The second picture shows the thinness of the fossil level and the other pictures show the roughness of the surface. I wonder if it might be an algae mat of some sort. I looked at posts on the forum dealing with algae mats and similar and find things loosely similar but not conclusive to my untrained eyes. If it is an algae mat, it may be a fossilized cyanobacterial piece. At this point I’d like help just putting it into the broad category of what it is, which will direct further research. More pictures available if anyone wants. If you have ideas, thanks for sharing. And if they come with some reference source, even better. Thanks. Tom
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Read about the waurika oklahoma permian site on the forum. The directions, location and site description were perfect. I found many small pieces of bone, and teeth and incredible numbers of orthocanthus shark teeth. I have a two pieces that I would appreciate help with. The larger one is 17 to 20 mm (the diameter of a quarter) and the smaller is 5-8 mm in size and a tenth of it in weight. The smaller one looks like what I have seen called a small demetradon limbus claw, and a friend thought the larger was a diaductes incisor. I would appreciate help. The small claw? seems very small for demetradon, and the larger seems very curved for what little I have seen of diaductes. All help and suggestions will be appreciated. This is the only permian material I have ever collected, I have no background to go on.
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Is this a rugose coral or a bryozoan? There are definite bryozoans in this rock of different types. I was thinking it's a rugose coral, but want other eyes on this specimen. Collected from the Phosphoria Formation in Wyoming, so it's Permian in age.
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End-Permian (252 Mya) deforestation, wildfires and flooding (open access paper)
Oxytropidoceras posted a topic in Fossil News
Below is a very interesting open access paper. Vajda, V., McLoughlin, S., Mays, C., Frank, T.D., Fielding, C.R., Tevyaw, A., Lehsten, V., Bocking, M. and Nicoll, R.S., 2020. End-Permian (252 Mya) deforestation, wildfires and flooding—An ancient biotic crisis with lessons for the present. Earth and Planetary Science Letters, 529, p.115875. https://www.sciencedirect.com/science/article/pii/S0012821X19305679 Yours, Paul H.- 1 reply
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Would like more guidance. I’m wondering if anyone could please direct me to site or paper listing the fauna of Permian formations (Moran / Pueblo / Wellington, Garber Complex).
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Scientific integrity in education and end Permian extinction
Oxytropidoceras posted a topic in Fossil News
Part 1 Scientific Integrity in Education; Part 2: “The Great Dying” – end Permian extinction John Geissman, University of Texas at Dallas Geologists of Jackson Hole https://www.youtube.com/watch?v=2nYTuDP54ZI Yours, Paul H. -
While removing out an unknown 2 inch long sponge from the Permian Fort Apache Member of the Schnebly Hill Formation from northern Gila County in Arizona I found several silicified brachiopods with spines. Several Bellaclathrus spinosus brachiopods were present ranging from 0.75 to 1.5 inch across and had spines as long as 1 inch. Thankfully some sort of sudden but gentle event buried the sponge and brachiopods preserving them for me to uncover.
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What is this strange object? Is it a bone? A possible fossil? It was collected on the shore of Northumberland Strait, Prince Edward Island, Canada. The strata at this location are generally late Permian, I believe. Thank you for any help you can provide. - John
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Hi all, I have in my collection, two small complete Claudiosaurus in matrix skeletons, and one round concretion which I believe to contain a larger Claudiosaurus (yes, I know some may be skeptical). I am trying the freeze and thaw method to expose him (or her), and had a set back, as a section broke off at the edge, and another on the right edge. It is a large concretion.. about a foot diameter by 4 inches... just so you know the scale. The matrix looks to be more fragile then what I have seen in other video's.. ie, a heavy hammer strke would likely fragment it into many piece. Underneath the corner section which broke off, you can clearly see what I believe to be vertebrae, though the cleave from the freeze thaw didn't really cleave it in half.. it seemed to cleave in sections, not following the fossil. The right crack is removable, and there isn't any fossil visible under that section.. but it created a nice 'T' that could be chiseled down. The section I'm holding in my hand has split with the fossil on both sides, which is what I was hoping it was going to do the entire way.. The good news is, that the broken off piece has exposed more 'territory' for water to permeate along the fossil natural cleavage, I believe. Those with expertise here. Should I continue to soak several days, and then freeze again.. or, at this point.. hammer and chisel? I am afraid to try anything at this point.. but think the freeze and thaw least risky. I think this is quite a valuable fossil potentially. I have attached a photo of the concretion, and his 'little brother' one of my Claudio skeletons.
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I dug this directly from the so-called “red bed” (making it Permian) in the north sulphur river. I thought it might be petrified wood, but I am confused as to what the piece is embedded in it. Any ideas?
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From the album: Vertebrates
Platysomus gibbosus (Blainville, 1818) Upper Permian Copper shale formation Bad Sachsa Germany Length 17cm / 7"- 3 comments
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Found some great fossils with the family today in Central Queensland , braved a dust storm but was worth it. They are all of Permian age in the Tiverton formation which is marine sediment. If someone can give me some exact IDs that would be great. More photos in comments
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Listing for dimetrodon manus track from el pueblo, NM. Five claw tip impressions but these are the only pics provided. Any thoughts?
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From the album: Permian era fossils
