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Found 194 results

  1. Help

  2. Concretion

    I was walking along the river and found this concretion. I have broke open many others and found nothing. This time there was something inside but I don’t know what. Any ideas? Comes from southern Alberta and what I believe is the Bearpaw Formation. If you look in the last picture where I wet it you can see some layers of Ammolite or shell. Any suggestions for cleaning around this thing without totally destroying it. It is very fragile and flakey inside. Or should it just be left as is. Thanks for any input.
  3. Rock to fossil decoration

    Wasn’t really sure where to put this but thought it was worth sharing. A couple days ago I found this concretion and then I decided to paint it to try to make it look like 5 dinosaur eggs (only a lot smaller, they’re all under an inch long). I’ll probably add to this with more rocks with fossils painted on before, After,
  4. Just a concretion?

    I know this is a concretion (found in Colorado) but fossils can sometimes be in concretions. I thought it looked interesting so I decided to ask about it here. Correct me if I’m wrong but the outside looks like sandstone, what could the inside be?
  5. What is this?

    Just wondering what it is.
  6. Ironstone nodule whatsit?

    Im guessing this is simply mineralogical, but I thought I'd put it up here to see what you guys think. Its an ironstone concretion from the lower Pennsylvanian. Its shot through with calcite, but its the black bits that are making me think it may actually be something. A close up of the interesting area.
  7. Clam fossil concretion?

    Found this concretion in Redwood creek by the Redwood National Forest. Clearly is some sort of shellfish, was wondering if anyone could provide any more details on when this fossil is from and what it is?
  8. I was fortunate to be able to take two trips recently to the Marmaton group in Northern Missouri and wanted to share my trip report with the forum. It's hard to find information on the Marmaton in Missouri, and I struggled with the geology and understanding what members within the Marmaton I was seeing, but I had a great time non the less. I grew up in this region and have some ‘insiders’ information on a few spots I wanted to check out just from spending time running around the countryside as a kid. The first was in a local creek in the township I grew up in that contains concretions we called ‘dragon eggs.’ I was curious if they would contain fossils so on my first trip in early September I committed to breaking one open. First, here are a few pictures of the site: I was able to break this one open, and it did contain fossils! The blue line on the lower left marks a very thin layer of limestone that the concretions seem to form right above. Here are a few more pictures of the concretions for reference. A particularly large one: And one that is just cracked: Unfortunately for me only the very first one I broke had any fossils. I spent several hours hoping another would reveal some but luck was against me at that point I guess and I failed to find a single one. Frustrated I spent the remainder of the evening searching through the fallen limestone exposures. The next post will contain some of the specimens from the single fossiliferous concretion and the limestone.
  9. Lingula brachiopods

    Could these be Lingula Brachiopods? If not, what? Thanks Greg
  10. Coral or Sponge?

    I found this yesterday during my creek walk. It appears to either be a Coral or Sponge atop a Concretion. It also has the "mud" on top which is fairly common...but it's very hard. It was found between the Upper Tully and Lower Tully formation which are both Limestone, between is black shale. The diameter on top is approx. 10"-12" and the reveal of the side is approx. 6". Thanks Greg
  11. Coprolite or concretion or ?

    Good morning all ive never found coprolite as far as I know. I’m wondering if either of these two are. If so, of what and if not, what are they? Note the hair or fiber of some sort in the lighter colored one. As always, thank you for sharing your knowledge
  12. trying to identify another find

    The front, back, side and bottom of whatever this could be? I could not find anything to measure it with but for now hopefully the pictures alone help for the meantime. The shape of it reminds me of a bone for some reason so that's my guess as to what it could be; not quite sure of what this texture on it is though, i scraped a bit of it off fairly easily and it was dusty brown coming off of it, but not too hard when scraping the surface it barely had any resistance. I tried scraping the exposed part of my other find; the iron concretion to compare the 2 and the concretion was much more durable on it's exposed part to try ruling out if it is just another ironstone concretion. It was found in the same brook called "big brook preserve" in central new jersey in the united states. Another possibility that I've came up with is that this find might be a concretion but not nearly as old and formed yet. Right now it could be anything. Thank you to whoever responds and helps with this post; very much appreciated.
  13. I have my first good scribe but have been so busy I've only really worked on my "sanity crab" Anyway - to all you beginners - dont do what I did - just commit. I started with an electric engraver, then I got a CP 710 engraver and now I have a 9361 clone - It ROCKS! Here is my new victim... I honestly thought it would fight me but I was surprised... I'll give it a few more hours...
  14. My biggest Tumido crab yet!

    Well I started my next project tonight, and compared to the last one, this one is so much fun (so far ). The rock is softer and it also peels off the shell beautifully. Things are going to get a bit more complicated I can see already as there is a thick layer of powdery calcite around the edges. I originally thought it was shell and I’d stripped off the shell the whole time But I checked with the scope and it’s calcite. Some before pictures. The concretion is 24 cm (9.5 inches) wide. The claws were already exposed like this, I found it wedged in between 2 rocks facing me like this! The big claw exposed section is 8 cm (3 inches) long, so the big claw will be at least 16 cm (6 inches long)!
  15. Egg?

    I know there are tons of 'not an egg' look alike rocks but as they don't seem to resemble this one I will venture to ask...my daughter found this in a shallow riverbed on our camping trip last week to central Connecticut. The brown shell like pieces are thick and uniform. There are some in the opposite side as well, will upload more pictures. This pic was taken the day of the find. Any insight would be welcome. My daughter is 4 and pulled it out because we were discussing all the different colors of the river rocks. This one looked nothing like the others. A man we had chatted with the day prior lives close to the riverbed and had spent the summer doing a lot of rock stacking and moving lots of the river stones around to build these rock nests in the water for his toddler to play in. A lot of the areas we were wading in were spots he'd been uncovering and relocating rocks. ANYWAY - any comments are welcome. Thanks in advance.
  16. What is this?

    I have no idea what this little object is. It’s not wood, not man made, not a concretion as far as I can tell. Half inch long & found in big brook
  17. Liesegang rings?

    At first I thought it might be the cross-section of petrified trunk but upon a closer inspection, I doubt it's petrified woods. It is not silicified. I wonder if it's a concretion or Liesegang rings? I don't think I have seen something like this in person before. I couldn't get it extracted because it's embedded in the bedrock.
  18. Location: Missouri Geological time period: Pennsylvanian Formation: Muncie creek shale I believe it is some sort of cartilage or fish material but I honestly have no clue.
  19. Concretion 5: Fish Cartilage

    From the album Muncie Creek Shale Nodules

    One of my larger concretions and personal favorites
  20. Location is in Missouri The area is dated to the Pennsylvanian Formation: Muncie Creek Shale Found this very small tooth like structure and was wondering if anyone could confirm if it is a tooth or not. Normally I can identify teeth if they are large enough, but this specimen is very small. I have found teeth before in these concretions but much larger such as a possible Symmorium or Glikmanius along with a tooth from a member of Eugeneodontida. Here are some images I edited that might make some details more clearer:
  21. Location is in Missouri The area is dated to the Pennsylvanian Formation: Muncie Creek Shale I assume this could be some part of a fish, as I have found other parts of them inside a few of the concretions from the Muncie Creek formation such as cartilage, or it could be some sort of crustacean part but I do not know what this one could be.
  22. Drum fish or concretion or ?

    I’ve had these in my substantial pile of ??? I saw a recent post that looked similar and pulled these three out. Roughly 1/4 inches. Are they drum fish or concretions or ??? Thank you
  23. Fish Spine Fossil? ( Missouri )

    Location is in Missouri The area is dated to the Pennsylvanian Formation: Muncie Creek Shale I was cracking Phosphatic concretions and this baby popped out! I was excited and thought I should share and ask what it is! I believe it is a cartilaginous fish spine, but I have little knowledge in such topics. Ps Information on good glue to glue together the cracked piece is welcomed!
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