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  2. Petrified wood but what else?

    Welcome to TFF from Austria, @Coastalrocker! Nice contrasting opinions! The layering of the matrix looks woodish, but the "striation" seems to cross also the filling of the holes (only scratched surface?). The holes don´t have any septa nor can I see some costae (did I miss some?). Some of the holes are collapsed or displaced, I don´t know if this is typical for one or the other. In summary: I don´t know what this is! Franz Bernhard
  3. Petrified wood but what else?

    This is known as Teredo wood. An internet search will provide similar photos to your specimen. The "tubes" are boreings of of what was once thought to be a worm but is now known to be a marine clam. The crystal lining is common in many specimens.
  4. Sometimes You Have To Whack It !!

    Thanks Rich, I have been putting off opening concretions and need to get in gear. Can’t wait to see your finds.
  5. I have been negligent in posting specimens here lately. Here are some recent openings. Enjoy! Cheers, Rich I nice orbicular pinnule of Macroneuropteris. A syncarid shrimp. I can't see the tail to probably either Tyrannophontes or Acanthotelson. It looks much better in person! This one was a small chip off a much bigger concretion. It pays to be patient with the river concretions as individual layers can contain a fossil. And a millipede. It's small so the quality of the picture isn't great. I'll try to take a better one with my USB microscope.
  6. Turtle flipper?

    A turtle's flipper would have bones similar to our hands ( but a little different of course! ) Here is a picture of a sea turtles "flipper" bones.
  7. Trilobite cemetery?

    Sorry, I do not. For reference, you might be interested in: Upper Franconian and Lower Trempealeauan Cambriantrilobites and brachiopods, Wilberns Formation, central Texas, WC Bell, HL Ellinwood - Journal of Paleontology, 1962 Trilobites of the Upper Cambrian Ptychaspid Biomere Wilberns Formation, central Texas SA Longacre - Memoir (The Paleontological Society), 1970 Late Cambrian and Early Ordovician Faunas from the Wilberns Formation of Central Texas DON WINSTON and HARRY NICHOLLS The missisquoiid trilobite Parakoldinioidia Endo 1937 in the uppermost Cambrian of Oklahoma and Texas, and its biostratigraphic significance STEPHEN R. WESTROP & JONATHAN M. ADRAIN Hope this helps some.
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  9. Sometimes You Have To Whack It !!

    Great to see you back at it! And, some real nice shapes to freeze/thaw... Good Luck! The new specimens are exciting as usual. I'm going to post a few recent openings in my river post as I have been neglecting lately too! Cheers, Rich
  10. Dug this little guy out today from same deposit as Sharktooth Hill location ( Mid. Miocene ). What I would like to know is this from a juvenile or a small posterior adult tooth. It is prepped labial side showing. Thanks for your insights.
  11. Head Scratcher

    Given the sharpness of root angle I would put it as a G. aduncus.
  12. Petrified wood but what else?

    Yes!! Thank you. After looking at pictures I’m fairly certain it is. Googling “petrified wood with tubes” was definitely not helping me out. New to fossils and rock hounding (mostly agate hunting) so I’m sure I will have more questions! I appreciate the help!
  13. Let's see your latest mailbox score!

    I am guessing it may be from Michigan but it came with no label and the seller didn't know much about any of the fossils he had.
  14. Unique Mazon Creek

    Those are really nice! I really need to go there!
  15. Trilobite cemetery?

    Nor did I! Please show pics if you've got any, grandpa.
  16. Let's see your latest mailbox score!

    Nice batch of acquisitions... I've got a Utah Cambrian brach and of course the Ellipsocephalus, but still need to get me one of those St. Petersburg trilo and a cystoid. I've seen them around but haven't managed to pull the trigger yet. Any idea where the Hexagonaria is from?
  17. Shark tooth ID from Jacksonville, Florida

    Cropped and brightened:
  18. Head Scratcher

    @MarcoSr @caldigger @sixgill pete @Al Dente
  19. Multiple Hunts this week

    First rate report, Jack! Thanks for posting your wonderful pictures and finds.
  20. Petrified wood but what else?

    A phaceloid coral colony, i should think. Something along the lines of Siphonodendron perhaps.
  21. Trilobite cemetery?

    I really need to check that out! Didn't even know Texas had any Cambrian fossils.
  22. Shark tooth ID from Jacksonville, Florida

    Nice tooth. That is a bull or dusky shark tooth (Carcharhinus sp.).
  23. Petrified wood but what else?

    Sorry forgot. It is 10cm long and 9.5 cm wide at its widest point.
  24. Petrified wood but what else?

    Found in pacific city Oregon. My daughter found this on the beach and thought it was a cool fossil rock. After getting it home I noticed the rings and I am fairly certain it is petrified wood but what are the holes? Some are hard packed with sand (rock hard, cant break it up) and others have crystals in them. This area is well known for agate, not sure if that has anything to do with it. Very unique, if it is truly petrified wood I have never seen any like this.
  25. Method to determine shark development stage from teeth

    I think that juvenile or very young shark is the more logical explanation due to the size but curiosity won and i had to look for further information.
  26. Yorktown Formation ID

    Thanks everyone!
  27. Reposting in hopes of a second look

    Thanks Caldigger! I value the insight and opinions of experienced members like you.
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