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  1. Sally Hunt

    Huge concretion? Identification

    I hope this is the place to learn some knowledge. My husband works in a quarry in Devon and after a blast has come across these four beautiful giant concretions? Which were in a pocket together. I would be interested to know what they are made of. We have washed the one which was the smallest - the only one he could carry -the colours seem to be very red with some orange. There is also another which is around 1.2meters across which we will be adding to our set. I would be interested in any information regarding our new found rocks
  2. jikohr

    Mazon Creek id help

    Hi everyone, I was going through some more of my Mazon creek material and could use some help with ids I have some ideas what these might be, but I'm still pretty inexperienced and would really appreciate some help. Thank you in advance!
  3. Lone Hunter

    Concretion or coprolite?

    Found in Eagle Ford creek, funky looking whatever it is. Because of the fine grains and indent on the end I started thinking maybe this wasn't just a concretion, but I'll leave it up to the experts.
  4. Hello, I purchased this specimen a few months ago at an estate sale. No label, no information. The fossil has been split lengthwise, polished, and the interior void space looks to have been filled with a sort of yellowish epoxy. Each half measures approx. 4.75 cm long x 2.5 cm across. Original depth before cutting looks to have been around 2.5 cm. I believe it is a Turritella, in a distinctive layered, calcareous concretion. I was able to find a photo of an almost identical specimen on a college professor's website, but I was unable to get additional information after following
  5. AJ Plai

    Dinosaur Egg or Concretion?

    Hi I have had this supposedly dinosaur egg said to be from the Nanchao Formation in Henan China for quite sometimes and I have never really been sure of it's identity whether if it's just concretion and would like to have some experts and third party opinion on this. Any help IDing this specimen would be appreciated. This is the specimen in question: I have also put the specimen under microscope and tried taking picture of the supposedly shell surface texture but am still not quite sure what to make of it whether if this is a texture of a dinosaur egg specimen?
  6. Buteo

    Vertebra and rock ?

    If someone could identify what type of ( white weird shape rock) this is would be great, no info. The vertebra is from Montana according to memory, any idea species ? Sorry for lack of details
  7. Lone Hunter

    Concretion or coprolite?

    Picked this up in creek that is mostly Eagle Ford but is downstream from where it cuts through QAL. Pretty sure it's a concretion but given it has a few inclusions want to make sure it's not coprolite, and yes I read the post on the subject but still left me unsure so best to leave it up to the experts!
  8. During an afternoon break I found a dozen or so promising concretions at an outcrop of Fayetteville shale. I'm thinking of going the freeze/thaw route as my history of hammering concretions is a but hit or miss. Curious as to the opinion of the forum on the best technique. Also, should I consider setting a couple aside and try to get whole fossils by remove the matrix? Thanks in advance.
  9. Hello- My son and I recently found this Tully Monster. I am wondering what everyone's thoughts are on cleaning this, and what approach may be best? I have cleaned jellyfish and some other white calcified looking material from these types of concretions using vinegar for a few minute soak, but have heard that it may not be a good idea since it removes some of the material that helps define the imprint. The Tully we have was found in two different scenarios. The first image, the side was facing down in the dirt a the top of a hill. The second was found face up in a pi
  10. tom_mo

    help with ID- Mazon Creek

    Hello- I am posting for the first time on this site, it's been a great resource for comparing some concretions I've found over the past few years. I've been taking my son on these collecting adventures, and we seem to find at least one nice specimen per trip- although it sometimes take a few months for them to crack open! We found this concretion in Braidwood area, pit 11. It had already split but still together. I have some similar looking shrimp but not 100% sure what this is because the overall form looks a little different, so hoping to get some help
  11. CBchiefski

    Advanced Dinosaur Egg Guide

    The Advanced Dinosaur Egg Guide Please share this with those who have egg questions. When possible, technical terms were avoided or defined. Every effort has been made to ensure accuracy, but it is always important to do your own research. This guide is merely a snapshot of information taken from many scientific publications. I am not an expert on eggs, rather I just love sharing what little I have learned over the years, what science has learned over the years. For an overview on how to spot a fossilized dinosaur egg and the sizes of eggs, see the basic guide:
  12. 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?
  13. 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."
  14. 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
  15. 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
  16. 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!
  17. 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
  18. 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.
  19. Lucybug1

    Help

  20. 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.
  21. 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,
  22. 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.
  23. Kandee k.

    What is this?

    Just wondering what it is.
  24. 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?
  25. 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?
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