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Found 761 results

  1. Encope borealis (A.H.Clark 1946)

    From the album Echinodermata

    9cm. Sand dollar. I'm assuming that this comes from Pleistocene layers somewhere in Mexico. The seller had no idea, but fortunately the friends here in the forum did.
  2. Encope grandis (Agassiz 1841)

    From the album Echinodermata

    9.5cm. Sand dollar. I'm assuming that this comes from Pleistocene layers somewhere in Mexico. The seller had no idea, but fortunately the friends here in the forum did.
  3. Mellitella stokesi (Agassiz 1841)

    From the album Echinodermata

    9.5cm. Sand dollar. I'm assuming that this comes from Pleistocene layers somewhere in Mexico. The seller had no idea, but fortunately the friends here in the forum did.
  4. Teeth found on a beach

    Hello, A few years ago me and my daughter found this tooth on the beach in the Netherlands. Since then we started to go regularly to several beaches to find washed off treasures. I though one of them was a horse tooth from the pleistocene...now i am not sure..it's too compact and short..i would love to have your expertise on it
  5. Hey all! This week my colleagues and I published a paper we spent most of the last decade sweating over. It is an exhaustive report of all known late Miocene-Pleistocene records of teeth of Otodus (aka Carcharocles) megalodon teeth from the west coast in an attempt to estimate the date at which O megalodon went extinct. Aside from some conspiracy theorists who will wait until they die and not see a live 'meg', we all know it's not living today as there is not a shred of positive evidence indicating its existence. We know it's around in the Miocene, and the early Pliocene. Did it survive into the Pleistocene? End of the Pliocene? or become extinct sometime earlier? These questions require serious thought because it has direct implications for whether or not O. megalodon went extinct at the same time as a bunch of weird marine mammals or if it was killed off by a supernova known to have occurred 2.6 Ma. An earlier study pooled fossil occurrences from around the globe and statistically reconstructed a mean extinction date of 2.5 Ma, with significant error (~3.6 Ma to 100ky in the future being the max and min extinction dates). We found that in the California record, reliable occurrences are only found in early Pliocene rocks. All examples of late Pliocene or Pleistocene teeth were either poorly dated, reworked from Miocene rocks, had poor provenance, or are completely missing (and never photographed) and therefore the identification cannot be confirmed. We thus predicted a 3.6 Ma extinction date. To test this, we re-analyzed the dataset published in 2014 but chucked a bunch of bad data and exhaustively re-researched the stratigraphy of each locality and corrected about 3/4 of the dates in the remaining dataset, and added our new California records. When we analyzed this corrected dataset, our margin of error (the time between the max and min extinction dates) shrank from 3.6 million year long interval to 900,000 years; *probably* extinct by 3.6 Ma (mean extinction date), definitely by 3.2 Ma (min extinction date), and possibly as early as 4.1 Ma (max extinction date). This extinction therefore precedes the 2.6 Ma supernova, as well as the Plio-Pleistocene marine mammal extinction (which in all likelihood was not a mass extinction or an extinction event, rather just a period of higher extinction/origination rate). About 4 Ma is when fully serrated Carcharodon carcharias teeth show up in the North Atlantic, indicating when the two overlapped, however briefly. We think this biotic event matches best - the mechanics of exactly how this was driven are to be figured out by someone else, but perhaps adult Carcharodon outcompeted juvenile O/C megalodon prior to becoming gigantic. Some analyses of Otodus lineage growth rate is going to be necessary. Here's the open access paper here: https://peerj.com/articles/6088/ Here's a blog writeup I did for PeerJ here: https://peerj.com/blog/post/115284881293/early-pliocene-extinction-of-the-mega-toothed-shark-otodus-megalodon-boessenecker/ Excellent summary in Nat Geo: https://www.nationalgeographic.com/science/2019/02/megalodon-extinct-great-white-shark/ CNN: https://www.cnn.com/2019/02/14/us/megalodon-extinct-earlier-scli-intl/index.html Fox News: https://www.foxnews.com/science/megalodon-shocker-huge-killer-shark-may-have-been-wiped-out-by-great-whites Forbes: https://www.forbes.com/sites/melissacristinamarquez/2019/02/14/great-white-sharks-may-be-the-reason-why-giant-megalodon-shark-is-extinct/#6a06986a6486 Daily Mail: https://www.dailymail.co.uk/sciencetech/article-6700495/Giant-50-foot-long-predatory-shark-went-extinct-one-million-years-earlier-previously-thought.html
  6. Looking to acquire a nice looking Pleistocene mandible of a Odocoileus virginianus ( White Tailed Deer) to go with a leg mount I have. *Must have teeth intact. I can trade Bakersfield shark teeth or ? Please PM with pics.
  7. Fossilized Arizona Human Footprint (?)

    Let me start this off with two disclaimers: 1- I am sorry if this post would be more appropriate on an archeology forum. I would think that it would be fine here, however, because the "footprint" impression does appear to be fossilized. And because I have yet to join any archeology forums. I anyone has a recommendation for a good archeology forum let me know. 2- Being almost entirely engulfed in learning about just the Cretaceous of my local area, paleoanthropology is a bit out of my purview. So bear with me if I sound like I don't know what I am talking about. Because I don't. I feel more comfortable with ammonites and Ptychodus. On Wednesday night my mother brought to my attention a post by a Facebook friend of her's, Kevin, who was recently out leading a group of 4-wheeler enthusiasts along some extremely remote Arizona desert trails when he happened upon what appears to be a fossilized human footprint. He really enjoys the rugged beauty of the deserts of the southwest and has been leading groups on such 4-wheeler outings for many years. Because he doesn't have a TFF account and because his Facebook page is private, I am posting this for him. I don't know if this is a real print or, even if it is, that it would be a significant find. I just thought that it wold be appropriate to check with TFF now before it eventually erodes away, just incase it is important. My mother has been friends with Kevin on Facebook for years, and his association with our family goes back to him knowing my great-grandparents at their church in Parryton, Texas decades ago. From that long association, he seems to be the type of person that has neither the inclination or time to be faking tracks. His interest is in exploring the desert, not perpetrating weird hoaxes. My concern is not that he faked it, but that perhaps some other unscrupulous person, apparently with a lot of talent, came along the trail and did it. When this fossil piqued my interest I asked him if I could post this to a fossil forum that I belong to and he gladly allowed me to, saying that he hopes to learn as much about it as he can himself. During our conversation, he also said that he found it, "out in the middle of nowhere near Quartzite, AZ." Along with the pictures of the impression he wrote, "While I've seen several dinosaur footprints this is the first human one I've seen preserved in sedimentary rock. I'm always amazed when I think of all of the circumstances that had to come together for this to occur. Of course, I have no idea how old it is. I have been under the impression that Native American tribesman that might have roamed these area were small people, partially based on the size of the doorways in dwelling I've been to in Utah. This print is an adult and looked to be about a size 10 [about 25 to 28 cm long]. Perhaps this is older or more recent. No telling. But still impressive." To my untrained eye I don't see any obvious signs that this is faked, but I would like to know what you think about it. His didn't indicate the presence of any other tracks in the area, so either he missed them, the others are already weathered away, or more are still buried. Again, my knowledge of paleoanthropology is still wanting, but from reading theses articles (here, here, here, and here), I gather that human tracks in North America are rare but, as I see from the first article, they are not unheard of in Arizona. The first article is on a multi-track site just north of Tucson. And from the pictures in the articles, Kevin's would seem to be a very well preserved specimen if it is real. Interestingly, Mancos shows that the geology around Quartzite is very similar to that just north of Tucson, even though Quartzite is about 200 miles to the northwest of Tucson. The geology around Quartzite and Tucson is mapped as Quaternary surficial, with the age range listed as from the Gelasian (1.8 Ma) to modern holocene. Here are the only two pictures of the impression that he posted, along with his pictures of the surrounding scenery of the area. I am also including pictures of the Mancos map of the areas around Quartzite and Tucson. Hopefully the pictures are enough to at least say whether or not it is worth further investigation or an obvious fake. Thank you for your time. Fig. 1 Fig. 2
  8. Scientist May Have Discovered Massive Crater Under Greenland Ice Sheet, Daily Beast, Feb. 2019 https://www.thedailybeast.com/scientist-may-have-discovered-massive-crater-under-greenland-ice-sheet Photos: Craters Hidden Beneath the Greenland Ice Sheet, Live Science, February 12, 2019 https://www.livescience.com/64755-photos-greenland-craters.html The open access paper is: Joseph A. MacGregor, William F. Bottke, Jr., Mark A. Fahnestock, Jeremy P. Harbeck, Kurt H. Kjær, John D. Paden, David E. Stillman, and Michael Studinger, 2019, A Possible Second Large Subglacial Impact Crater in Northwest Greenland First published: 11 February 2019 https://doi.org/10.1029/2018GL078126 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL078126 The paper states: "Based on the dated radiostratigraphy of the Greenland Ice Sheet, available for pre-2014 radar data only, the ice overlying the structure is at least 79 ka old (Figures 1e–1h; MacGregor et al., 2015)." Yours, Paul H.
  9. I found this today while I was out seeing if I could find more pieces of my bison. It was at the same level as the bison, but about 30 feet down the creek. It is turtle or tortoise, but I’m not sure what kind or if it is modern or Pleistocene. I looked through a Texas turtle database and did not find a match with any listed there. So it leaves me wondering if it could be an extinct variety. The shell patterns are so distinctive I’d think it could be ID pretty close to what it is. Here are pics. Any thoughts or or comments would be appreciated.
  10. This comes from Centerville Beach, Humboldt County California. I've found alot bivalves and snails in the cliffs where I found this. Another Formation 5 miles away has had reports of turtles, shark and marine mammal teeth and even agatized whale bones. I'm sorry about the quality of the pictures. I do not currently have a very nice camera. Its sticks to my tongue and has a rough porous surface. The divet on the right side of the bone in the first picture is a place where is has apparently broken.
  11. Fossils and Magma

    Hey guys. In NZ we have quite a few volcanoes, and luckily for me living in christchurch, the most recent eruption in the south island was about 20 mya. On the "vanished world" trail, there is a preserved basaltic volcanic dyke/sill that has been injected into the strata beneath an ancient lagoon. While I'm aware that these magmatic intrusions don't break the surface, there is a broad fossil horizon not far from the top most termination of the sill, with beautiful small spirulla (?) (Some kind of elongate fossil snail) preserved in the rock. I was wondering, that as I mentioned before that this fossil horizon is not too far from the intrusion, just how much heat or mineral replacement does it take for igneous rocks the the associated hydrothermal minerals to completely destroy/deform/disfigure fossils in these kinds of geologic environments? I have included a rough sketch. Like all great geologic exposures, it occurs at a public road cutting, to provide context.
  12. Cave Lion - New look!

    Hey everyone! Here is the new look of the Cave Lion! With smaller mane as u see. This is something new for me,to draw animal in the other position.Also, at the end of the paper is a bison skull, example of his diet. Enjoy Darko
  13. Zdravo svima! "Hello everyone!" Again with Ice Age animals! Now with my favorite animal, the Cave Hyena or Crocuta crocuta spelaea.I've done it in my way,also using the spots of one cave painting where Cave Hyena has spots going from the head to the middle of the stomach.And,yes the ear has been bitten by other predator and now scar is visible.I hope u Will like this one Kind regards, Darko
  14. Butvar-76

    Hi Everyone, I recently decided to start preserving all of my pleistocene fossils and feel that Butvar-76 would be the best option. My problem is I can't find it anywhere. I contacted the Florida Paleontological Society and they said they don't carry it anymore. They recommended I either use Duco Cement in acetone or to look on the Museum Service Corporation website. On the Museum Service Corporation website it says that Butvar-76 has been discontinued, but they have an equivalent called B08SY Resin. Here's what they have listed: Butvar Resins White, free flowing powders. Generally soluble in alcohols, acetone and aromatic hydrocarbons. Forms films similar to polyvinyl acetate and is suggested as picture varnishes. Widely used to waterproof textiles. The films resist degradation by sunlight and heat. Average molecular weight is 30-34,000. Butvar B-76 has been discontinued. B08SY Resin is considered an equivalent resin to Butvar B-76, from a different supplier. It utilizes the same Polyvinyl Butyral resin as Butvar B-76. B08SY resin has the same solubility as Butvar B-76, but has a smaller grain size. Contact Museum Services Corporation for additional information, or to acquire a sample for testing purposes. F4503-001 B08SY 1 kilogram $34.00 F4504-001 B-79 1 kilogram $31.09 F4505-001 B-90 1 kilogram $25.08 F4501-001 B-98 1 kilogram $46.12 Has anyone bought B08SY or know where I can still get Butvar-76? If not, are there any consolidants that you would recommend using instead?
  15. Microcyphus sp. (Agassiz 1846)

    From the album Echinodermata

    4cm. diameter. Pleistocene From Hurghada, Egypt
  16. Echinometra sp. (Gray 1825)

    From the album Echinodermata

    7x5.5x3cm. Pleistocene From Hurghada, Egypt
  17. Reindeer vertebra

    From the album @Max-fossils 's Zandmotor Finds

    A reindeer, Rangifer tarandus, vertebra found on the Zandmotor, about 40'000 years old ("Mammoth-steppe" period, in the Late Pleistocene). It seems to have been bleached by the sun (most bones on the Zandmotor are darker than this).
  18. Complete prehistoric buffalo skull found in Cambridgeshire quarry by Jamie from Fossils Galore in March By Sarah Cliss Fenland Citizen, January 16, 2019 https://www.fenlandcitizen.co.uk/news/complete-prehistoric-buffalo-skull-found-in-cambridgeshire-quarry-by-jamie-from-fossils-galore-in-march-9059305/ Yours, Paul H.
  19. Florida Pleistocene Bone

    I recently aquired these bones in a creek off the Peace River. I found it along with some other Pleistocene era things. Does anyone know what animal this belongs to or what type of bone it is? I can't find anything like it.
  20. Pleistocene mammal mandible ID

    I found this today along with a full bison skeleton in Collin County Texas north of Dallas. It is a Pleistocene lower mandible of a mammal, but I’m not sure what kind. Any thoughts? It is partially mineralized. More so than my bison. Any help would be appreciated.
  21. A day on the caloosahatchee

    A friend and I headed out on the caloosahatchee this morning. We went to our favorite location hoping to find some more Lions Paw's. The start of the day was wonderful. We got on the river near Alva just as Dawn was beginning to break. There had been a controlled burn yesterday so the sky was lit up orange and gold and beautiful. The river was medium height. But there was no wind and early in the morning the big Yachts don't create so many waves. We had it down to our favorite spot checking the walls along the river all the way down. On the way down I found a couple of pieces of antler although it's not shown in the photograph. As usual we found lots of pieces of turtle shell which I've been saving hoping to set into a concrete table top. They're so plentiful but I just thought they would be really cool. Has we got to our spot and started digging my friend had a couple of strombus fall out of the wall. That was followed by the only Lions Paul we found. We found a whole range of other things as you can see from the photograph my favorite is the vasum horridum. I have a large piece of antler or horn I can't identify. so i'll be posting that this week hoping someone can help. sorry for The lack of scale. these are in the tailgate of it truck
  22. Incisors

    Good evening, I explore sites around Travis county here in Texas and stumbled upon these three around Lake Travis area. Been having a hard time with identifying them, found inside a rockshelter nearly 40 foot back from entrance on surface
  23. Laos / Cave fossils shed light on the world of 80,000 years ago By: Uffe Wilken, Sotheast Asia Globe, January 10, 2019 https://sea-globe.com/lao-cave-fossils/ Tam Pa Ling Cave - https://en.wikipedia.org/wiki/Tam_Pa_Ling_Cave A couple of papers: Pierret, A., Zeitoun, V. and Forestier, H., 2012. Irreconcilable differences between stratigraphy and direct dating cast doubts upon the status of Tam Pa Ling fossil. Proceedings of the National Academy of Sciences, 109(51), pp.E3523-E3523. https://www.pnas.org/content/109/51/E3523.short Shackelford, L., Demeter, F., Westaway, K., Duringer, P., Ponche, J.L., Sayavongkhamdy, T., Zhao, J.X., Barnes, L., Boyon, M., Sichanthongtip, P. and Sénégas, F., 2018. Additional evidence for early modern human morphological diversity in Southeast Asia at Tam Pa Ling, Laos. Quaternary International, 466, pp.93-106. https://www.researchgate.net/publication/314164578_Additional_evidence_for_early_modern_human_morphological_diversity_in_Southeast_Asia_at_Tam_Pa_Ling_Laos https://www.researchgate.net/publication/320628876_Early_Modern_Humans_from_Tam_Pa_Ling_Laos_Fossil_Review_and_Perspectives https://www.researchgate.net/profile/Fabrice_Demeter Yours, Paul H.
  24. Coral head ID,

    With the Peace river a bit too high to fossil hunt, I have been heading to some of my other favorite jaunts...there is a little stream ( only 2 feet wide) that meanders through Lee County just a little north of the Caloosahatchee - it probably feeds into another larger creek, though I haven't bothered finding it ...at any rate, with permission, I have hunted it for a few years now. This however is the first interesting coral head I found there. It is like iron...i know the coloration is from exposure, but the coral itself is extremely hard...those top edges are sharp like kiives. It seems to be part of a larger globular coral, as the inside/bottom has that tell tale curvature to it. I have included a closeup of the septa on the bottom, but on the top they are so deep as to not be seen...just that honeycomb effect. is that because the septa are softer and worn out, or were they naturally recessive in this type of coral...and of course, can someone tell me what it is.
  25. Yukon paleontologist’s fossils are pure gold: Grant Zazula will be giving the 19th annual Dr. John Rae Lecture in Hamilton, focusing on the amazing lode of fossils and ancient DNA in the Yukon, and its connection with the hunt for gold. by Jeff Mahoney, The Hamilton Spectator https://www.thespec.com/opinion-story/9117772-yukon-paleontologist-s-fossils-are-pure-gold/ Paul H.