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  1. Kimmikee

    Crab or Pretty Chert or...

    I found this in January on the Llano riverbed in Central Texas. I was just looking at rocks and liked the coloring. It was getting dark and their was a few similarly colored pieces somewhat near each other so I tossed it in my bag and didn't look too close. I didn't think much of it until I got home. I know practically nothing so please be patient with me. I know rocks often look like other things, but this seems to have shell on both sides and "meat" in the middle. The bumps and texture seem to match crabs. However, I understand tissue is rare so this seems unlikely to me. I would really appreciate constructive feedback. Thank you all.
  2. Ezio Bonsignore

    Harpactocarcinus punctatus

    I am very intrigued by this critter being currenty offered fo sale. It seems pretty obvious to me that the rock it is sitting on has nothing to do with the original matrix (and indeed, the seller's text does not mention thr world "matrix" at all). But then, if the fossil has just been glued onto an appropriately shaped rock, how was it prepped to start with? Is it possible for crabs to get fossilised into such a soft matrix, that is it then possible to "free" the entire fossil completely intact, with all its legs, sort of Michelangelo's style (*)? And in any case, what technology and tools could produce such a result? (*) Michelangelo maintained that the subjects for his sculptures were already present inside their marmor blocks even before he started working. on them. All he had to do, was to remove the superfluous material.
  3. rocket

    crab prep

    seen some minutes ago in the www great job! Video | Facebook
  4. Kbsib

    Crab

    I’ve been fossil hunting on South Carolina beaches for several years. Never have I found a crab. Yesterday I found two. (I think) They look very similar to the blue crabs in this area. Were there crabs many thousands of years ago and did they look similar to those of present day?
  5. Today I took a spur of the moment trip up to the Canyon Lake area for some hunting in the lower Glen Rose. My first venture into the region took place last year and was only a limited success in that I scored a measly two micro echinoids. The plan for today was to try some new spots in hopes of striking the perfect layer of echinoid diversity. The first site was a complete bust, but the second immediately showed promise when I noticed the ground was littered with broken bits of thin echinoid test. Because I had arrived so close after the recent rains, the ground was still a sticky slop of Glen Rose mud. The combination of running along the slopes and frequent crouching set my calves on fire, but the scent of urchins kept me on the chase. Very quickly I was lucky to encounter some really nice crab claws from Pagurus banderensis. A couple had both pincers still preserved. Surprisingly common was also the tiny crushing dentition of Pycnodont fish. They aren't all that interesting to look at, but the simple fact that vertebrate material was present gave me daydreams of finding an elusive Glen Rose shark tooth. I tried to shake away such a hopeless goal, but it continued to sit in my mind. After a couple hours, I found an Amiid fish tooth and some star-shaped Isocrinus annulatus columns. For whatever reason, I could not find a single echinoid spine, let alone a complete test. I was searching the ground very closely, so my thinking was it may be more to do with the site than myself. As I was doing the usual close inspection, I snuck up on a black figure nestled securely in a pile of Glen Rose matrix. It took a moment to register that I wasn't looking at just another chunk of black bug. I safely stashed the two pieces of Polyacrodus. Sadly, the third fragment was nowhere to be seen despite my best efforts. After finding some more crab claws it was time to head out. On the trek to the car, I spotted a Trigonia whitneyi? clam, maybe from the upper Glen Rose. I'm not sure what species this is. I see Polyacrodus aff. parvidens is described form the Texas Albian up north. Other than that, there doesn't seem to be much info. I've seen some discussion on Polyacrodus brevicostata being a possibility as well. Top L to R: Trigonia whitneyi? and Pagurus banderensis Bottom L to R: Amiid tooth, Pycnodont teeth, Isocrinus annulatus It seems my streak of urchin unluckiness has continued, but I'll take a Polyacrodus any day of the week!
  6. SharkySarah

    Crab claw

    From the album: Miocene, Maryland and Virginia, USA

    Unknown species. Calvert formation.Calvert co. Maryland.
  7. Shellseeker

    A day in the Sunshine

    I went fossil hunting yesterday. It is an activity that brings a smile and renews my soul. Sometimes I like the solitude of hunting alone ( my 1st 18 months I only hunted alone), but this day I was blessed with good friends and I could tell stories, share their cut up fruit and trail mix, and marvel on what we were finding. These are mostly my treasures.. None of us found large quantities, I had less than 50 fossils in my collection bag... but what we did find was unique and/or had some quality aspects... A tiger , 32 mm across the root. A Dusky or Bull, never sure which A fishjaw and a Tree root.... and below, a rare find for me ... note it tried to break,. it will not get the chance again A dolphin tooth found late... not one that I could name. Friends also found a Dolphin tooth earlier, Slightly larger. When this rolled into my sieve, I knew it was familiar, I rolled it over and over, but I was not expecting it , could not ID. My friends did. Menippe was a Genus of Stone crabs back in the Florida Pliocene. I wonder if this was a late arrival. I liked the quality of the fossils... look at the details of this crab claw... I was picking up a bunch of (broken) bones that I only slightly recognize with the intention of posting some of them but maybe in future posts. I do have a femur that I am curious about... I always search TFF for helpful threads: http://www.thefossilforum.com/index.php?/topic/102805-peace-river-femur/ It has this comparison photo.... For comparisons, I possess a SaberCat femur at 13 inches if complete. Here's the key: 1-Horse femur, 2-Sabertooth Cat femur, 3-Human Adult Female Femur, 4-Komodo Femur, 5-Harpy Eagle Femur, 6-Kiwi Femur, 7-Platypus Femur, 8-Spider Monkey Femur, 9-Rhesus Macaque Femur, 10-Vervet femur, 11-Goliath Frog Femur, 12-Flying Lemur Femur. The bone seems not sufficiently robust for tapir, horse, llama, cow,, so maybe deer, coyote, bobcat.... Here is a mule deer for comparison. I think total length of Mule deer femur would be 11-12 inches. Any suggestions will be followed... Thanks for reading...
  8. Neanderthal Shaman

    First go prepping a Pulalius vulgaris

    Finally got my compressor and air scribe set up, and am now getting to work on the concretions I gathered over the summer and fall. Just to see if I could do it, I took a crack at the smallest one I knew had a crab in it, at barely more than 3 cm wide. My friend lent me a scribe with a smaller bit than the one I bought 3 months ago, and it handled itself pretty well here. Did ding the carapace a handfull of times, but pleased with the outcome of this first crab venture. Prepping one this small was stressfull, so I'm looking forward to working on larger ones that don't demand as much precision.
  9. Lone Hunter

    Crab on the run?

    Don't think it matters but this is a Cretateous crab, don't think I've ever seen a crab that wasn't in what I'm assuming is a moulting position so curious what's going on with this little guy. Was it maybe dead and floating or perhaps trapped in the sediment and struggling to get out?
  10. svcgoat

    Crab from New Zealand

    I started prepping this crab I purchased when I was in New Zealand. I am relatively new to prepping so not sure how much more to do. I cleaned up the crab and revealed a little bit more of it so far. Not exactly sure how much more is hiding under the matrix
  11. Fin Lover

    Crab claw 11.26.23

  12. Entoloma

    12kg Tumidocarcinus prep

    A few months ago, I came across this big crab concretion sticking out of the sand. It was my second largest of the day, but only by a mere 10kg! Still! 12kg aint too bad. Where I found it, was quite sandy, and another fossil hunter had been there before me, but fortunately he hugged the cliff face, there and back. I walked towards the ocean and spied some legs sticking out of the sand! I started this prep with my ZOIC chicago and rounded chisel tip. It removed 2kg of rock in two hours. Not the fastest, but it beats my old dremel by a long shot!
  13. This piece is supposedly a horseshoe crab ( Mesolimulus walchii) from the Solnhofen limestone of Germany. It is Jurassic and the description says there has only been mild color enhancement. Is this fossil real? Any fabrication? Thanks for the answers!
  14. I had a couple hours to kill so I took a trip to Calvert Cliffs today. It is really picked over by this time of year. I found 7 ray plates, 3 small shark teeth(2 are broken), 3 crab claw tips, and some misc bone frags. I also brought back some matrix to go through and grabbed a little clay too. Does anyone one of breaking down the clay ever produces anything?
  15. joesheen

    Crab fossil find?

    Hi, not sure if right place to post but really stumped by this.
  16. Shaun-DFW Fossils

    Possible fossil crab? Joshua TX

    I found what I think might be a fossilized crab, though it might also be a rock combined with my imagination. If it’s anything else, I’m interested in that too, whatever it ACTUALLY is! Thanks in advance to the pros and more experienced hunters who can help! I have thick skin and a sense of humor, so don’t worry about offending me. I’m about 10 months into this hobby so I have a lot to learn! Found a few miles south of Benbrook lake near Fort Worth TX.
  17. jcorradino

    crab fossil in ny?

    id? found this at a beach in Ontario near ny has the hallmarks of a crab fossil but I don't know if it is
  18. What is the best way to prep crabs from the London clay? Would an ultrasonic cleaner work?
  19. Just finished another New Zealand crab concretion. Only a few more dozen to go. Woooooooop,,,wooooooop RB
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