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  1. SunshineOnACloudyDay

    Petrified or concretion?

    Hey guys I found this in a dried up creek bed right above where a dam had been. The location was in Sandia, Texas. Very close to the mathis lake state park. I've done some research but I' be had it about 4 or five yrs now and would love an opinion from someone that has had experience in this field. I think it's a petrified peach half. What do y'all think?
  2. Another find in Pit 11 of Mazonia-Braidwood complex. Found already open on the ground. I was unable to find the other half. It looks a bit like the images of Neuropteris fimbriata and Cyclopteris trichomanoides in Jack Wittry's "The Mazon Creek Fossil Flora."
  3. Location: Missouri Time period: Pennsylvanian Formation: Muncie Creek Shale I have been going through some old nodules I had collected from when I first found an area full of these nodules. I happened to find this and was unsure of what it was due to how it was sort of "Shiny" for lack of a better term. I also have some other different phosphatic nodules with similar features and would love to post them here if anyone is interested. I ultimately wish to have some sort of identification for these materials. Some sort of inclusion in thi
  4. Samurai

    Concretion #16: 4.1 cm Fish Coprolite

    From the album: Muncie Creek Shale Phosphatic Nodules

    4.1cm Fish coprolite This particular section has a little bit of Cartilage from what I presume it had consumed millions of years ago Both sides of the Concretion/Nodule
  5. Samurai

    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!
  6. Leesaa

    New Mexico fossil

    I thought this looked like a coprolite or possible ammonite concretion on top of a clump of fossilized unknown. What do you think? Found within an hour of Albuquerque along the Rio Puerco or cliffs* over the Rio Grande. Either Rio Rancho or Los Lunas. * By cliffs, I mean sandy hills full of rocks. On their way to being washed into the river. *****I was told the photos did not show. I have tried to edit to add them. Weird glitch in this program since I see them all when I log on, even if I get off the site then back on. Thank you for letting me know they were invisible
  7. jort68

    Concretion Innards

    Hello again! Hope everyone is having a fossiliferous holiday. I found this split concretion yesterday with some organic looking form peeking out from inside. Take a look: No idea. Nothing recognizable except that hole. Found this at the same site, those long and narrow shells might have been what was stuck in there? What do you think? Nothing and it's just gobs of clay?? Let me know if you have any thoughts and as usual, thank you so much for your time and consideration.
  8. Lucybug1

    Help

  9. Lorney

    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.
  10. Top Trilo

    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,
  11. JimB88

    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.
  12. Kandee k.

    What is this?

    Just wondering what it is.
  13. Top Trilo

    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?
  14. humble_egotist

    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?
  15. 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 concreti
  16. grg1109

    Lingula brachiopods

    Could these be Lingula Brachiopods? If not, what? Thanks Greg
  17. ralphd

    Crocodile Skin?

    Hey guys, Found this a couple years back outside of Calgary on a roadtrip. Went for a hike in a badlands looking area and randomly stumbled across it. Wasn't looking for fossils really, but this clearly caught my eye. Thanks!
  18. grg1109

    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
  19. Doctor Mud

    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 wedge
  20. butchndad

    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
  21. devlincdev1997

    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 durabl
  22. 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...
  23. Bradley Flynn

    Fossil bone?

    Something that looks like a fossilized bone. Got it out of a rock I split open, the rock in the pic with the green arrows pointing to where I extracted the thing in question. Any ideas?
  24. jrm6359

    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 pri
  25. butchndad

    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
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