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Found 156 results

  1. Please help identify

    I live in Northwest Indiana and my mom found this concretion. One side of it is fossilized though and has these indentions in lines. Any help identifying would be greatly appreciated. Thank you.
  2. Just some of my concretion landscaping. They were all found in Middle Tennessee. I’m curious what other kinds of fossils may occur in them besides gastropods? I have found several that nature cracked open containing Gastropoda.
  3. Gastrolith question

    Amateur alert: i am NOT a professional paleontologist; I am a semi retired therapist who happens to be a paleontology hobbyist. I've seen several things advertised as gastroliths, and the prices seem easily doable. But HOW in the world is a rock determined to be a gastrolith, and not just a smoothish-rock that's a bit worn? A rock that has been inside a prehistoric animal (not just dinosaurs, I'm guessing?) is WILDLY cool, but a smoothed and tumbled rock is not.
  4. My extraordinarily gifted fossil finding son found this in the bedrock of Brushy Creek (Williamson County, Tx.) and I can’t figure out what it is. Apologies for not using a proper scale or for poor picture quality but it is ~2’ in diameter and has well defined concentric rings. My son would love to show anyone in the Cedar Park area where it is and will offer a free Moonie’s hamburger to anyone who can help solve this mystery. Any help is greatly appreciated!
  5. Hello, I found this rock, and it has this dipped area with a kind of pattern (I think it could be a concretion), and there's this fossil-looking thing on the back. Is anybody able to ID this? Thanks.
  6. Is this a fossil?

    hello together, I saw this in an auction and am wondering if it may be something of interest? The blackish parts where it is broken looked somewhat bone-ish to me. No info but estate sale in the USA, 7.5” long, 5.5” wide and about 2” tall. Weighs 3 pounds Any ideas? Thanks and Best Regards, J
  7. Potential concretion?

    Found this at a undisclosed spot near Ventura, also found a large fossil shell deposit potentially from Pliocene. Will post pictures if people want me to. Btw if you have any clue or want pics of the other side of this please comment!
  8. So, as a 12-year old fascinated with fossils, dinosaurs, etc. I found this and assumed it was a fossil egg. As I am much older, I tend to think more of a concretion, but the shape, and little kid in me says "yolk" but the adult says concretion. Again, found in St. Louis county along creek. Interesting none-the less?........... stay healthy! Bone
  9. Is it petrified wood? Concretion?

    Dear friends, let me submit a sample from the alluvial sands of Kyiv, Ukraine. Please help me decide: is it a concretion or a fossil, and if it is a fossil, what could it be? May be, it is carbonized wood? As I know, Cenozoic deposits are possible here in Kyiv. In the Paleogene, the territory of Kyiv was covered by the sea (here the bones of the Basilosaurus were found), since the Neogene - land. I applied vinegar, and my sample does not respond Thank you in advance for the tips!
  10. Fossil ID

    Wife and I own 10 acres in Central FL. Property is known for arrowheads and fossils, but we are new to the hunt. Contractor digging irrigation trenches turned up large, heavy chunk that looks like concrete in of sand and clay(?) chock full of signs of ancient life.
  11. Thrifting..

    The fossil addict in me would really appreciate IDs on the following from the thrift store down the block: Mazon concretion, I thought it to be a crab at first glance but you tell me: And then this, which I couldn't peg for a mineral or some kind of fossilized pollen..... Really don't know what to think. It's about 0.5" square. Any ideas would be greatly appreciated, thanks for taking a look.
  12. Another concretion or seed?

    Here is another one of my "unidentified" items. I purchased as a seed pod, but I've been having serious doubts lately. It was described as "seed pod from SW desert". I'm thinking it's just another concretion. Am I right?
  13. What is this???

    Does anyone know what this concretion is? It came from Mazon Creek and was listed as a Unusual Rock concretion fossil. I purchased it ten years ago and am hoping others like this have been found since then and a description determination has been made. Help.
  14. Mazon Concretion

    Hey all! Just bought this piece at a rock shop here in Chicago. It was sold to me as a shrimp, the shop owner was pretty confident in this, but I'm pretty sure it's a fern instead. Not disappointed since I just appreciate the composition here, it's a super pretty one, kind of off-beat. Can anybody help ID the exact fauna? Thanks so much!
  15. Concretion Fossil ID

    I found this over the weekend. I’m trying to figure out if it’s a fish vertebrae or something else. It appears to be coming through on the other side as well (3rd picture). I’ve included some pics of other fossils in the same rock. I’m sorry for size reference. I don’t have anything in millimeter lengths laying around. Thank you all.
  16. Insect ID request

    Can anyone tell me which insect this is? It's Jurassic, Charmouth, Dorset, England. 1.5"
  17. Fossils, or...?

    I tough these two "things" were coprolites (cut and polished), but after taking a look at past discussions here I'm no longer sure. On other other hand, I don't know of minerals that would grow on a spiral. What do you think? Diameter is about 10cm and 5cm, respectively. No idea about provenance - both bought at flea markets in Germany. Thanks in advance
  18. egg or strange rock

    i prefer to play in the dirt to find fossils but i couldn't pass this up at an estate sale. price was right so i brought it home to study. not sure where it came from. any info would be much appreciated. thanks
  19. Managed to stop in for a little Mazon Creek style Easter egg hunt when I was up in Chicago last June. Brought back maybe a gallon or so of concretions and I've been cycling them in my freezer (when I remember). I like to give them a bit of a (gentle) tap around the edges from time to time. This often helps the concretion to shed an outer layer or to coax a split that is nearly there and just begging to pop. As expected, I've had a number (the majority) of concretions open up to reveal a complete lack of anything at all within. The only thing that revealed itself to be of interest was this little concretion that measures 3.5 x 4.0 cm. I pulled out my copy of The Mazon Creek Fossil Fauna book and you think with that information at my fingertips that I'd be able to make a coherent guess as to the identity of this fossil but I am at a loss to match it up convincingly to any of the taxa described there. Hoping some of the members here with more experience can chime in. @Nimravis @RCFossils @stats @Mark Kmiecik
  20. I found a drainage ravine with thousands of these these in them. I'm almost certain they're an iron concretion of some type but I've gotten several different identifications. I took a few of them to the MAPS expo last spring for an ID. One person said michelinoceras, but then an expert on cephalopods said no, definitely not, but he had also never seen anything like them. These were found on the north side of Dubuque, IA right at the top of the lower Galena dolomite just above the upper chert beds. They are in a thick sticky grey clay which sits just above a thick iron rich encrusted layer that varies from 1/4 to 1/2 inch thick (blackend hardground?). The clay layer is approximately 20' thick and contains thousands of these. They are almost all vertically oriented, cylindrical in shape, and vary from 1/2 inch to as much as 6 inches in diameter, and vary in length from several inches to several feet long. Some of the smaller ones that have weathered out do look amazingly like cephalopods. I had previously found a few pinky finger sized weathered ones farther down the ravine and thought cephalopod but then found the clay with the bigger ones. They have a center that resembles a siphuncle but I don't see anything that looks like septa or individual chambers. There are too many of these to think they haven't been found before but I can't seem to find anything describes them specifically for this area. I did find a paper from a study done in Finland titled "Ferruginous Concretions Around Root Channels and Fine Sand Deposits". That paper seems to describe what these may be be but since I've gotten a couple different ID's and none of them concretion I was hoping someone with a little more knowledge can tell me for sure. url to the research paper - https://doi.org/10.17741/bgsf/47.1-2.020
  21. Strange colour crab claw

    A couple of hours in on our fossil hunt at Glen Afric, I spotted another crab fossil! This had now been our 3rd crab of the day. We have not found a similar crab to this one. Any ideas or thoughts on why the colour is so strange?
  22. Glen Afric New Zealand fossil

    A few weeks ago, we stumbled upon a concretion along the shore at Glen Afric. These are the photos. If anyone can ID them, it would be much appreciated. (length is given in cm) (The weight is 4kg) Top Height Bottom
  23. "I've Got the Snitch" Fossil hunter finds 185-million-year-old ‘golden snitch’ with ancient sea creature inside Charlotte Edwards, Digital Technology and Science Reporter, Nov. 18, 2019, https://www.thesun.co.uk/tech/10369483/golden-snitch-fossil-yorkshire/ Yours, Paul H.
  24. Hello, I’ve noticed something odd with some of my mazon creek fossils that I haven’t looked at in a long time. Some of them seem to have small spots developing on them that I could swear weren’t there, say, 10 years ago. Anyone have any idea what these little circles are? There are 4 on the left Tully monster right above the white paint. And 1 on the right Tully just off the lower left edge of the body. And the white paint is a whole different issue... Open to any suggestions on how to remove that too... was thinking about rubbing alcohol. And then here is a shark egg case that seems to have a LOT of the little spots/circles. Thanks for any insight.
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