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Found 45 results

  1. I found this bone on a Tampa Bay Beach, Florida and the next week I found an identical one but left it. When I first scooped it out of the water I thought it was a molar from a manatee. After looking at it I saw it didn't have a root and was it a joint bone? From the weight and color I think it's modern but curious to find out what I found and what animal. (ruler is in inches) Any help or ideas welcome and appreciated.
  2. Bone

    Just curious what this bone might be. It's not a fossil but wondering what the bone experts think... deer or something else?
  3. No idea about what this is.

    Recently re discovered a bunch of these things that we got from the Canary Islands. They were all washed up on the beaches and they do not look stricktly geological to me and looks kind of like some kind of modern calcified organism or trace of one. I stumbled upon a book at some point, I believe it was called Darwin's Fossils that said these were some kind of remains of algae that have fossilized, but when I looked that up there was no evidence I could find supporting this claim, maybe someone else knows what these things could be? Any new insight is appreciated, Thank you.
  4. I picked up this Wild boar (Sus scrofa) jaw section from Florida recently. While it not recognized in the Florida fossil record due to the boar being an introduced species in the past 600 years or so years. This piece has heavy patina, and is mineralized but is too young to be a fossil as it is thought to be a peice that is 400-500 years old. I have Mastodon and cave bear material that are older and far less mineralized. Other than using the rough date of 11k years ago, how else do I explain why a younger less mineralized peice is not a fossil while an older less mineralized peice is a fossil? Thoughts?
  5. Bovid ID?

    Ok as if the clam wasn’t enough excitement for the day, not that this is exciting I also found what I believe is a very old, but modern cow skeleton, which I believe is most likely fully articulated. I just want to confirm it is cow. I went fossil hunting yesterday, which was almost a complete and total bust for me. Rarely happens, but that was the case fossil wise. However that does not mean I didn’t find some really cool, very, very cool, want so badly kind of stuff, but I couldn’t carry them out because they were too big and heavy. Anyway, it was miserably hot. I believe I found the hardest, most difficult, poison ivy overgrown path I could possibly find into the creek. First attempt was a 25 foot drop straight down into the creek. I scouted a small section of the creek out, found lots of very cool stuff, but only a coupe of oysters and that was it fossil wise. I was hot and wanted to check out another place before dark so I looked for an easier way out. I found one I thought I could manage. Problem was I was in my flip flops. I had no traction. If I’d been in my boots I’d had no problem at that spot. I couldn’t make it so I went further up creek. The creek water was like warm bath water and offered no relief from the heat. I came to a spot in the creek where a pool of water was divided off from the sandbar. I stepped into it and too my surprise the water was cool and sooooo refreshing. I splashed it all over myself to cool down and walked on. I walked maybe 10 feet and saw this on the edge by the creek bank. It seemed to have recently fallen about 4.5 feet from the middle of the creek bank above. There was a large clump of bank to the right that had more bone in it. I have to mention that I was a few hundred yards from a cemetery so it gave me pause. I had to process it a moment and determine that these were not human bones. Wouldn’t that be horrible! The cemetery could be 100 yrs old. The creek changes course over the years and encroaches upon the cemetery and graves start washing out into the creek!! Yikes! I’m sure it must have happened somewhere once upon a time. Didn’t happen here though. Moving on. This was embedded in the bank about 4.5 feet from the portion of the creek I was standing on and about 5 feet down from the top of the bank. No way it could have been redeposited since it seems largely articulated. I’d been seeing concretions in the bank of the creek so initially I thought the ball to the right was a stone. I was taking a pic of the broken bone. Rib maybe? The ball and one above it I think are heads of femur or something. Here is the bank. You can’t really see the other bones in the bank in this pic. They are there though. Bad quality pic, but I removed some of the dirt from the bank to expose the bone. There is more bone to the right and left. Some of the bones that had fallen from bank. A vertebra Anyway, do you think it is cow or could it be bison? That’s about all the pics I have. It’s modern, but I’m curious. I am assuming the cow must have gotten stuck in the mud and died. The cool water in the creek had to be coming from an underground spring. This was maybe 10 feet from there. Maybe it made the soil very soft and contributed the the bovid’s demise. I have come across cow skeletons on numerous occasions that died in a field and are completely disarticulated from wild animals scavenging them. That didn’t happen here. It must have been mud or something.
  6. Coral, fossil or modern

    I have a friend that brought this chunk of coral from the Dominican republic and said that it washed out of a cliff face and he picked it up afterwards. I really do not see any signs of it being a fossil and believe that it is probably modern. What do you think? Thank you in advance.
  7. Hi guys! I just uploaded a gallery of modern Carcharhinus upper dentitions: . The images are from my master's thesis (Smith 2015), the full text is available at (https://www.researchgate.net/publication/316735477_Species_discrimination_in_Carcharhinus_shark_teeth_using_elliptic_Fourier_analysis). Unfortunately, due to file size limitations, the images in the paper are not really good enough for detailed analysis of the morphology. So I have uploaded them individually here. I personally extracted the teeth from almost all of these jaws...If I remember correctly, they were soaked in isopropyl alcohol for several days and then the teeth removed with toothpicks and/or just pulling them out with my fingers. I cut up my fingers too many times to count trying to get these suckers out! Only the upper dentition is included; the bottom teeth in Carcharhinus are very same-y so we just focused on the uppers. Keep in mind, these represent only twelve species out of over thirty described species. They are biased towards species today present in the Western Atlantic/Gulf of Mexico. Five species now present in the Western Atlantic/Gulf of Mexico were not included due to lack of specimens/time: C. altimus, C. galapagensis, C. perezi, C. porosus, and C. signatus. Other Carcharhinus dentitions are available on the net. J-elasmo has some, I believe mostly collected from near Japan: http://naka.na.coocan.jp/JAWCarcharhinidae.html. They generally match well with my dentitions, although their Silky (C. falciformis) dentition is more coarsely serrated at the tips than mine, and the lateral notch, which is prominent in my specimens, is basically absent in the J-elasmo dentition. And of course there is Elasmo.com, a great resource for all sharks, not just Carcharhinus. Their C. falciformis dentition is similar to mine, so I don't know what's going on with J-elasmo's dentition, either it's mislabeled or Silky teeth look a lot different in the western Pacific. Or it's just an unusual specimen. And of course there are a bunch of papers online with Carcharhinus teeth, although these are generally isolated fossil teeth. The single best resource I could find for Carcharhinus identication based on teeth is unfortunately difficult to obtain, and would probably require an interlibrary loan request: Garrick, J. A. F. (1982). Sharks of the genus Carcharhinus. US Dep. Commer. NOAA Tech. Rep. NMFS Circular, 445, 194. His shark teeth images are illustrations, but well done, and with a lot of descriptive information. Purdy et al. (2001) is also a good reference:(https://www.researchgate.net/publication/284595551_The_Neogene_sharks_rays_and_bony_fishes_from_Lee_Creek_Mine_Aurora_North_Carolina). You can find references to several papers related to fossil Carcharhinus, as well as a general overview of their fossil record, in my thesis. Finally, I'm attaching a figure from my thesis, illustrating the morphological terminology used: C. falciformis, upper right jaw, 5th position from symphysis. Feel free to add additional references or information about the genus Carcharhinus. Or if anything is incorrect in this post. The subject of fossil Carcharhinus tooth identification comes up fairly regularly in the forums, so let's try and stick as much information in here as possible!
  8. Carcharhinus leucas

    From the album Carcharhinus dentitions

    C. leucas. Bull shark. Scale bar= 5mm.
  9. Carcharhinus falciformis.jpg

    From the album Carcharhinus dentitions

    C. falciformis. Silky Shark. Scale bar=5 mm.
  10. Carcharhinus brevipinna.jpg

    From the album Carcharhinus dentitions

    C. brevipinna. Spinner Shark. Scale bar=5 mm.
  11. Carcharhinus brachyurus.jpg

    From the album Carcharhinus dentitions

    C. brachyurus. Copper shark. Scale bar=5 mm.
  12. Carcharhinus amboinensis.jpg

    From the album Carcharhinus dentitions

    C. amboinensis. Java Shark. Scale bar=5 mm.
  13. Carcharhinus albimarginatus

    From the album Carcharhinus dentitions

    C. albimarginatus. Silvertip Shark. Scale bar= 5 mm.
  14. Carcharhinus acronotus

    From the album Carcharhinus dentitions

    C. acronotus. Blacknose shark. Scale bar=5 mm.
  15. Carcharhinus sorrah

    From the album Carcharhinus dentitions

    C. sorrah. Spot-tail shark. Scale bar=5 mm.
  16. Carcharhinus plumbeus

    From the album Carcharhinus dentitions

    Carcharhinus plumbeus. Sandbar shark. Scale bar=5 mm.
  17. Carcharhinus obscurus.jpg

    From the album Carcharhinus dentitions

    Carcharhinus obscurus. Dusky shark. Scale bar=5 mm.
  18. Carcharhinus longimanus

    From the album Carcharhinus dentitions

    Carcharhinus longimanus. Oceanic Whitetip Shark. Scale bar= 5 mm.
  19. Carcharhinus limbatus

    From the album Carcharhinus dentitions

    Modern C. limbatus blacktip shark. Scale bar=5 mm.
  20. Neoichnology pop quiz

    What life form caused the pattern of deformation seen in this gastropod. Five points each for Kingdom, Class, and Family. hint: It was found on the shore of a lake in Maine.
  21. ID: Modern bones

    Hi all, I found these (modern) bones on one of the beaches of the Cape of Good Hope (South Africa). All three bones were found about 3-5 m apart, so there is a chance that they come from the same animal. We have a rib, a vertebrae, and a jaw (missing the teeth). Anyone have a clue on the ID? Thanks in advance, Max
  22. Fossil or modern?

    Are these fossils or modern? Found in Idaho.
  23. New Jersey Modern Sharks

    Hey everyone, I recently walked on a beach near Keansburg, New Jersey, and came across an unusually large amount of dead animals. There were mostly crabs (blue crabs and spider crabs), baby shells, and jellyfish lying on the beach. However, I came across three small sharks. Does anyone know what factors might be responsible for the dead animals, such as rising water temperatures? If anyone knows what type of shark (I believe it is the smooth dogfish, Mustelus canis) and jellyfish that is, please comment. Thanks everyone, Joseph Jellyfish: Shark #1 body (with a fish behind it) Shark #1 dentition: Shark #2 remains: Shark #2 dentition:
  24. Tadpole trace ?

    These are not fossils, but the concept could be useful in understanding ichno fossils. At first I came to the pool without tadpoles, it was late in the afternoon on a warm day and I moved slowly as I contemplated how the craters were formed. Had birds been probing the mud ? There did not seem to be a direct correspondence between the tracks and the pits though. The next pool I came to was deeper and perhaps allowed tadpoles a better escape from predators. The pictures were taken the next morning and the tadpoles were more disturbed by my approach so it doesn't show the behavior, but they seemed to be covering themselves with silt in the pits. Applying sun screen perhaps ? Or is the correlation coincidental ?
  25. Back in the 1970's I was given these 4 teeth and was told they were fossil shark teeth. How can you tell if they're fossil or modern?????
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