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  1. I just got back from an amazing and very fruitful week of fossil collecting on the White River Formation in northeastern Colorado. The White River Formation is a very easy and fun rock unit to collect vertebrate fossils on. The White River Formation was deposited during the very latest Eocene and the early Oligocene, though the faunal diversity in the areas I was collecting on suggest it was laid down during the Orellan North American Land Mammal Age, which centers on around 33 million years ago during the Rupelian age of the Oligocene Epoch. I am very lucky to have a grand uncle
  2. The dinosaurs didn’t go out the way you think they did — study The paper is: Pickersgill, A.E., Mark, D.F., Lee, M.R., Kelley, S.P. and Jolley, D.W., 2021. The Boltysh impact structure: An early Danian impact event during recovery from the K-Pg mass extinction. Science Advances. Vol. 7, no. 25, eabe6530 DOI: 10.1126/sciadv.abe6530 Yours, Paul H.
  3. There is a new publication on fossil peccaries from North America now available online, if anyone is aware: Prothero, D.R., 2021. The systematics of North American peccaries (Mammalia: Artiodactyla: Tayassuidae). New Mexico Museum of Natural History and Science Bulletin 85: 1–76. https://books.google.com/books?id=fJcwEAAAQBAJ&newbks=0&hl=en&source=newbks_fb This publication provides a comprehensive overview of fossil peccaries from North America, and also erects three new genera, of which two were assigned to Prosthennops.
  4. How the Dinosaur-Killing Asteroid Spurred the Evolution of the Modern Rainforest New evidence from fossil plants shows today’s South American rainforests arose in the wake of Earth’s fifth mass extinction. Smithsonian Magazine Prior to the Chicxulub impact, rainforests looked very different Plant fossils from Colombia show a turnover from conifers to today's forests. by Doug Johnson, Ars Technica, April 1, 2021 Paper Carvalho, M.R., Jaramillo, C., de la Parra, F. et al. 2021. Extinction at the end-Cretaceous and the origin of modern
  5. I found this on online and am considering on getting it. Also, I'm new to online and don't know much about it.
  6. Svetlana

    Paleogene-bone id

    Good evening. I need your help. This bone was found in Paleogene sandstones (not redeposition, bedrock) next to a petrified opalized tree. Replacement is visible on the break. Who do you think it could belong to? Thanks! Have a nice evening
  7. Praefectus

    Otodus sokolovi

    L1: 7.6 cm L2: 6.2 cm W: 6.0 cm
  8. I propose to show us your Cenozoic corals. It is not necessary that it are identified although it would be better. What is necessary is that it are dated. Ok? Come on, I'll start. Cyathoseris castroi (Mallada, 1887) Lutetian South Pyrenean basin
  9. siteseer

    Fossillarry's Mammals

    As Larry familiarizes himself with how to attach photos to his posts, I will be posting for him. Larry is a humble collector of mammals but he is very experienced. He is one of the rare mammal collectors with knowledge of Eocene-Pleistocene groups. Most collectors specialize in Oligocene or Miocene-Pleistocene of North America but he knows a wide variety of forms specializing in ungulates (hoofed mammals of the Perissodactyla and Artiodactyla. He's hunted from California to Nebraska and South Dakota to Texas. The first specimen he'd like to share with the forum is a 2-tooth max
  10. Link: Two new species of Mennerotodus Zhelezko, 1994 (Chondrichthyes: Lamniformes: Odontaspididae), from the Paleogene of the southeastern United States Abstract Mennerotodus Zhelezko, 1994, is an extinct lamniform shark known to occur in Paleogene strata of the Tethyan region of Asia and Europe. Although only a single species has been named, multiple subspecies have been erected and used as biostratigraphic tools in Asia. The genus has not been reported with confidence outside of the Tethyan region, but we have identified two new species of Mennerotodus from Paleogene deposi
  11. Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to com
  12. KingSepron

    What are these shells?

    It was found in South East London, in a fossily area. Found 3 days ago and cleaned today.
  13. KingSepron

    Some sort of Gastropod

    Found at a paleogene site in South East London
  14. I found this bone in the san sebastian limestone, in Puerto Rico. I always find interesting fossils there, but this is the first bone I collect. There have been skeletons of extinct sirenia found in this exact same place, so maybe it could actually a fossilized bone from an extinct species. I have no clue when it comes to bones though, so an expert is highly apreciated.
  15. will stevenson

    Abbey wood microfossils

    Hi guys I found all this stuff searching through abbey wood micro matrix I collected last Wednesday and I was wondering if you could help me ID any of it thanks in advance location:Lesnes abbey wood, london age:paleogene formation: blackheath member, Thanet formation 1. Some type of fish jaw? 2.reptile or fish vert? 3.coral? 4.fish bone? 5.fish vert? 6.coprolite? 7.fishvert?
  16. will stevenson

    Mammal microfossils

    Hi guys I’ve posted this in a separate thread as I am hoping to get an ID on them in time for fossil of the month, any ideas? (Second one might not be a mammal just checking) also is the bone avian? from abbey wood paleogene blackheath member Thanet formation
  17. GallinaPinta

    San Sebastian Limestone

    So I went to this river thinking i was going to have a blast cannon balling into the deepest areas except I found an excellent specimen and spent the rest of my day collecting amazing fossils.
  18. O'Leary, M.A., Bouaré, M.L., Claeson, K.M., Heilbronn, K., Hill, R.V., McCartney, J.A., Sessa, J.A., Sissoko, F., Tapanila, L., Wheeler, E.A. and Roberts, E.M., 2019. Stratigraphy and paleobiology of the Upper Cretaceous-Lower Paleogene sediments from the Trans-Saharan Seaway in Mali. (Bulletin of the American Museum of Natural History, no. 436). http://digitallibrary.amnh.org/handle/2246/6950 Warning: the low-resultion PDF is about 204 MB and the high-resolution PDF is about 383 MB. Yours, Paul H.
  19. Gelfo, J.N., Goin, F.J., Bauza, N., and Reguero, M., 2019. The fossil record of Antarctic land mammals: commented review and hypotheses for future research. Advances in Polar Science. 30(3): 251-273 doi: 10.13679/j.advps.2019.0021 (open access) http://www.aps-polar.org/paper/2019/30/03/A190814000002 PDF: http://www.aps-polar.org/paper/2019/30/03/A190814000002/full Gelfo, J.N., López, G.M. and Santillana, S.N., 2017. Eocene ungulate mammals from West Antarctica: implications from their fossil record and a new species. Antarctic Science, 29(5),
  20. Steve D.

    GMR find that has me clueless

    Hey-oh! I found this while at GMR and I'm clueless as to what (if anything) it is. I've been though my fossil books and online but the curvature and the indention marks have me puzzled. I've not found something like this before. My luck it is a weird curious rock.. if it is, I'm just going to imagine it's a meg eye lid or something hahaha As always, I welcome your thoughts and appreciate you all Steve
  21. doushantuo

    something in the way it moved

    ajslocomeigenshmathemaquantmethodrose93.11Macleod.pdf Norman Macleod and Kenneth D.Rose: Inferring locomotor behavior in Paleogene mammals via eigenshape analysis American Journal of Science,v.293-A,1993 Given that the Paleogene was a time of incipient mammal diversification...
  22. D.N.FossilmanLithuania

    Please help to identify lizard osteoderm

    Dear Guys, Few months ago when I still was in Varena town I found this tiny osteoderm (probably lizard) in dolomite erratic with some other remains. By rough surface texture the fossil looks similar to Helodermatid but lizards consist of many families... Please help to identify this remain to know the age for sure, I would think it should be from Paleogene. Any help will be appreciated! Best Regards Domas
  23. Before These Parasitic Wasps Finished Devouring Live Flies, They Became Fossils. In fly pupae that turned to stone, scientists found evidence that wasps have been infesting other insects for tens of millions of years. By Nicholas St. Fleur, Aug. 28, 2018 https://www.nytimes.com/2018/08/28/science/wasps-parasites-fossils.html Digitally Resurrected: Parasitic Wasp Xenomorphia resurrecta Deposits An Egg in a Fly Pupa (IMAGE) https://www.eurekalert.org/multimedia/pub/179216.php The paper is: Thomas van de Kamp, Achim H. Sch
  24. In the current (July-August 2018) issue of American Scientist magazine there's an article on champsosaurs. Anyone who's collected Late Cretaceous fossils in Montana, the Dakotas, Wyoming, or southern Canada has probably found a few. You tend to get just a paragraph or two about the group in mainstream science articles about animals that survived the K/T extinctions but there's a whole article about them. Check out your local Barnes & Noble if you don't have online access.
  25. Gen. et sp. indet.

    unknown fossil

    A Late Cretaceous - Early Paleogene flint from southern Poland, full of fossils - mainly dasyclad algae and forams, I think, possibly some bryozoans too, and... a sun-shaped object. Any ideas?
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