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  2. Carboniferous winter hunt

    A "fresh"sphenophyllum
  3. Carboniferous winter hunt

    close up
  4. Carboniferous winter hunt

    I find ,most of the time, new pieces or better samples,I 'm alway glad to share my finds with friends also
  5. Great report Ken, good to see that you found a few outcrops where you still find some Maastrichtian fossils, you two did realy wel I realy like the double belemnite
  6. madagascan bivalves

    I would be very thankful if you can help me identify there madagascan invertebrates.
  7. madagascan bivalves

    I am not too familiar to this variety too : https://www.google.com/search?q=madagascar+fossil+clam&sxsrf=ACYBGNSyt5RjY1qraJUr3kcrF1FSPuVtBg:1581930994833&tbm=isch&source=iu&ictx=1&fir=q1GrCKB9r4EOpM%3A%2CRVLU8rvAwW_qDM%2C_&vet=1&usg=AI4_-kRLA3HGjyWBFynUylzJaveHH4B7QA&sa=X&ved=2ahUKEwish4aYoNjnAhXIUN4KHZ2nCtkQ9QEwAHoECAoQHg#imgrc=RJ1gyMjfCifnrM
  8. madagascan bivalves

    I am not sure if the oysters are RASTELLUM CARINATUM.... they look a lot like other fossil cockscomb oysters.
  9. @Monica And I too I've offered to "cutting and polishing a piece" another specimen. You find in the fields the good and bad specimens (bad and good quality). Let's cut and polish the bad specimens and define your good specimens (by/in/on analogy). Another variant: If you can't do it ("cutting and polishing a piece"), you can find cutting/chipped specimens in the fields. There's a lot of broken pieces in the fields. We need to see the side structure / the view from the side. @Mediospirifer Your specimens are interesting. I'll write about them tomorrow.
  10. madagascan bivalves

    I was wondering that the madagascan jurassic clams and cretaceous cockscomb oysters from my collection did not have a comprehensive label,I wanted to ask you what they were.. Here are a few photos online: https://www.google.com/search?q=madagascar+fossil+clam&sxsrf=ACYBGNSyt5RjY1qraJUr3kcrF1FSPuVtBg:1581930994833&tbm=isch&source=iu&ictx=1&fir=q1GrCKB9r4EOpM%3A%2CRVLU8rvAwW_qDM%2C_&vet=1&usg=AI4_-kRLA3HGjyWBFynUylzJaveHH4B7QA&sa=X&ved=2ahUKEwish4aYoNjnAhXIUN4KHZ2nCtkQ9QEwAHoECAoQHg#imgrc=oy8HBIbkpemGJM
  11. Teeth from the priabonian of dakhla morocco

  12. Today
  13. Sorry! 185mm for the atlas and 190mm for the sacrum
  14. Paleozoic algal matting?

    These 'folded' layers could be vertical stromatolite cones, there is often a very prominent irregular vertical element in stromatolites.
  15. Sauropods in Canada?

    Apart from the Sauropodomorph material from Nova Scotia that PaleoNoel mentioned, the only evidence of Canadian sauropods comes from tracks found in British Columbia. The first occurrence was from coal mines within the Mist Mountain Formation of southeastern British Columbia, near Sparwood (trackways referred to Brontopodus isp.), and i have measured one of the original trackway molds that was taken from the mine. The age of these tracks is either latest Jurassic or more likely earliest Cretaceous. Additional sauropod tracks were also recently found from the Aptian-aged Gething Formation of the "Six Peaks" track site in northeast British Columbia (these are now the northernmost record of sauropods in North America, the paper Troodon linked is out of date). No bones have been reported thus far, and I am not aware of any sauropod material (either tracks or bones) coming from Alberta.
  16. Parameters, part 2. What about exposure time? Originally I just used the camera's auto exposure feature. But Helicon Focus kept complaining, because sometimes the auto setting would change the exposure from one image to the next and this would make it hard to match up the images. One consequence of this would be bad color balance. So now I set the exposure manually. I actually do multiple runs at several different exposures, and then pick the one I like best. While some images are washed out and obviously over exposed, and others are dark and dim and underexposed, there's a broad range in between where it's a matter of subjective judgement about which is better. What about color balance? I still leave this to the camera's automatic color balancing algorithm. The preset values are useless -- I'm not doing the photography in sunlight, or under an incandescent light, and there is no option for 4000K LEDs. When I tried setting the color balance manually I always got horrible results much worse than the automatic algorithm, which, most of the time, is pretty good. My main gripe is that there is a tendency for gray trilobites on gray rocks to come out too reddish, if that happens there isn't much I can do but try to tone it down in GIMP.
  17. Parameters, part 1. I set ISO to 100. This gives maximum resolution and minimum light sensitivity. I can always deal with the latter by using a longer exposure. What about aperture? My standard setting is 7.1, which gives good resolution but only has a small strip of the image that is fully in focus. The first image was done with aperture 7.1 and the second was done with aperture 32, the maximum allowed with my 100 mm macro lens. Note that a very long exposure was needed for the second picture. It is clear that more of the image is in focus with aperture 32, but even so neither the spine at the pygidium nor the very front of the trilobite are in good focus. That is why I use aperture 7.1 with photo stacking.
  18. Teeth from the priabonian of dakhla morocco

    Maybe. The crown seems broader, though. I think I've seen a tooth like that from Harleyville where it's very rare. Marco Sr. has seen a lot of Eocene teeth from the east coast. We'll all wait for the lingual views. @isurus90064
  19. Tucson Fossil Show 2020 Photos

    Hi Troodon, In general dealers don't save specimens for Tucson like they used to. They sell online or with a phone call. Just from looking at this forum, you see a group of people looking for the same kinds of rare stuff. It appears fewer people hunt the Morrison than they used to. I would think there are fewer people scouting out there. It's easier to go where others have gone recently even if the pickings get slimmer. In recent years I'm happy to find even just a couple of specimens and a cool book/publication. In the 90's I used to bring home a couple of 3-inch flats worth of stuff and some publications. Jess
  20. Teeth from the priabonian of dakhla morocco

    I think you are right. I made the call too fast. Alopias fits the shape of the root better. Did you have a specific species in mind? Maybe Alopias ...alabamensis???
  21. Awesome fossil! Cheers, Rich
  22. Thanks guys! Can't wait to get back out into the field. Pit 11 opens up on March 1st. I hope the snow is gone! Cheers, Rich
  23. Teeth from the priabonian of dakhla morocco

    I won't keep you in suspense. Pending a lingual view of the three teeth on the left, I think the one on the left and the one on the bottom could be Alopias teeth. Jess
  24. Tyrannosaur teeth decision

  25. Tyrannosaur teeth decision

    Also look at this angle. Once you are done with the research, what would you like to have for you collection the most, a nice looking whole tooth or a handful of almost unrecognizable shards? I'm not sure what information you would be able to glean from the shards except how badly these teeth can break.
  26. Teeth from the priabonian of dakhla morocco

    @siteseer @MarcoSr What are you thinking the three teeth on the left are? I wasn't entirely sure about the isurus praecursor ID.
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