Jump to content

All Activity

This stream auto-updates     

  1. Past hour
  2. How would you proceed with this?

    That is teeny tiny! I would be tempted to leave it as is, but as a micro fossil preparator myself I wouldn't be able to resist giving it a go! I personally would use a microscope and a micro airscribe which does not vibrate. I wouldn't try with handheld tools. What is the matrix like? Soft or hard? (soft is relative to as soft as rocks can be! )
  3. Time Lapse Prep

    I've been dying to make time-lapse videos of my specimens. I work on micro vertebrates from the late Permian to early Triassic and have to use a microscope which makes position of a phone rather tricky! But your videos look awesome! And those teeth I love preparing teeth! Photos never do the small things justice!
  4. Today
  5. Latest Scottish Carboniferous finds

    That last piece with a jellyfish and crinoid is outstanding!!! Congratulations!!!
  6. Penn dixie never disappoints!

    Beautiful trilos - congrats!
  7. Possible fish skull

    Hello again. I found this strange bone on the beach in abu dhabi ruwais. I am not sure if it is a fossil, it is ver porous. It is about 1.5cm thick The beach was man made, so I am not sure exactly where this might of came from.
  8. Chicxulub impact acidified the ocean instantly

    @Randyw you raise an interesting point, and one that I've just been reading about this evening/morning as I try to better educate myself on the K/T extinction event. I was just reading about the Deegan Trap in Cretaceous India and the improved dating of the 3 major periods of volcanic activity associated with that area. The article points to the second, and strongest period of volcanism as beginning some 250,000 years prior to the Chicxulub impact and extending right up to the K/T boundary. The authors argue that this event resulted in the decline of the dinos and Chicxulub was the final kick that pushed the dinos over the edge. A "decline to a slow end" scenario seems to better align with what little I understand about the fossil record of that boundary period than a "flourishing biota with a punctuated end" and no bodies to show for it. One thing my evening's reading has opened my eyes to is that there is still a lot of controversy about what all was involved in the extinction - many ideas, little all-convincing evidence. So I guess the extinction scientists have some job security for the near future at least. Now we need to get to work on the 6th mass extinction and see if we can escape it somehow.
  9. Devonian Coral - B.C. Rockies

    Yes - Order Favositida, suborder Alveolitina, according to the Treatise (which is getting on a bit - 1981 - but generally reliable still).
  10. Chicxulub impact acidified the ocean instantly

    That is an excellent question @grandpa. My own personal thought unsupported by any evidence is that the dinosaurs were already pretty much extinct before the impact. Quite a bit before the impact there is a smaller biodiversity of dinosaurs and actually very few dinosaur fossils found Within a couple of meters of the boundary layer. So I suspect that the dinosaurs were on the way out or even completely gone except for a few isolated pockets before the impact. While there has been a few isolated single bones found as young as 61 mya they are still highly controversial and the testing methods were themself untested.
  11. Hi guys I have been offered this jaw section for a very cheap price which has me suspicious what do you think of it (also sorry video is what they sent me) 6CFA5250-7CBF-4D0E-8856-7035E6FA09DE.MP4
  12. when does archaeology become paleontology?

    Hi, I just wanted to fuel the conversation by pointing out that the border is very different for an American who considers every living being over 10,000 years old to be fossil, compared to a Frenchman who thinks that fossils can't be more recent than the appearance of man. That said, I agree with you that it is not easy to determine when man appeared on earth, and what kind of man. Toumaï (7 MYO), Ardi (4,4 MYO), Little foot (3,7 MYO), Lucy (3,18 MYO) ? Coco
  13. Great looking piece and an interesting way to prep it out!
  14. Unfortunately, it was prepped in September 2019 Next time I will be faster with my posting hehehe
  15. I give up. What is thisl?

    Can you add other pics of the opposite side of the specimen? very interesting piece, ciao
  16. Cambrian Shady Dolomite east of Cartersville

    Disclaimer, not from Shady. Reference image from the web.
  17. Can someone please help me with this shark tooth?

    Thank you all!
  18. October 2019 - Finds of the Month Entries

    Hello Ken, thanks for your efforts and the infos! Did you show the pic to Bernie? Oh well, new names are lurking... Thanks again! Franz Bernhard
  19. Chicxulub impact acidified the ocean instantly

    @DPS Ammonite this is much more along the lines of what I'm thinking of. Yes, there should be more sites, many more like this if the theory is correct.
  20. Chicxulub impact acidified the ocean instantly

    @Scylla thanks for your thoughts as well. Still, I think about the ashfall area in Nebraska. I would think, if volcanic ash covers up that many fauna and beautifully preserves them - predator and prey alike side by side on a lakeside - an asteroid striking the earth and the ash from the fires and dust from the explosion which would fill the atmosphere in massive (I can't even imagine) amounts and then rain down back on the earth's surface would, somewhere at some distance from the event on the planet, lead to much fossil evidence of such a massive, planet wide impactful event. Wouldn't you?
  21. Chicxulub impact acidified the ocean instantly

    @DPS Ammonite thanks for the thoughtful response. While I find these interesting hypotheses all; I, however, find myself unconvinced sufficiently by any or all of them together. It would seem that each of the events you posture would leave their own footprint in the sediment layers. Am I wrong? Also, if I can find an iridium-rich layer (not indium) still present and bedoites (impact glass) still laying around outside Bedo, Tx , why is there not at least a layer of ash or fossilized "surface" disturbance as evidence. No, I think this deserves more thought, at least on my part, before my questions are answered.
  22. Chicxulub impact acidified the ocean instantly

    I wasn't there, but imagine 1000's of carcasses piled up somewhere on the charred and battered surface. They would rot away in a relatively short time period unless burried, frozen, or mummified. The latter two categories would then rot when thawed or rehydrated. I think a similar thing is happening now with all the mammoths in Siberia rotting as the permafrost thaws. So where would carcasses pile up and then get burried? Maybe at the base of mountains or canyons? But the canyons will erode. So most of the earth's surface would not be amenable to these fossils forming in the first place. Even if they formed, they may have eroded away, or are just burried too deeply for us to recognise them. I do expect some sites should have fossil evidence of such a global catastrophe, and maybe the Tannis site is just that. I also think marine deposits would be more likely than terrestrial ones. https://www.newyorker.com/magazine/2019/04/08/the-day-the-dinosaurs-died
  23. Southern missouri fossil....i think.

    This looks like a legitimate fish fossil to me. I think you need to take this to someone in your area that is knowledge about local fossils and have them look at it. This might be something very special!
  24. Cambrian Shady Dolomite east of Cartersville

    I'm a bit confused. Is the trilobite in the photo from Georgia, and is it from the Shady? What is the source of the photo? I have heard of whole olenellids being found (rarely) in the Rome Formation but not the Shady. Don
  25. Thanks RB! Was really nice seeing it go from a concretion in the sand to a prepped crab
  1. Load more activity