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  1. KitKat

    Concretion?

    Hi all, this is my first post here. I found this the other day on a north shore Long Island NY beach, down at the water's edge. Looks like a partially peeled hardboiled egg. Was wondering what, if anything, it could be? I've tried to research as much as I could, but running into dead ends. Thanks in advance!
  2. Not the most exciting start to my 1st mazon creek freeze/thaw attempt, but at least its not blank. I am guessing some kind of plant material
  3. I found fragments of a cephalopod at the Lost Creek spillway site near Jacksboro Texas on August 21, 2021. Pennsylvanian, Graham formation, Finis Shale member. It includes a 90mm long section and two short phragmacones. The 8 pieces of the longer section were found adjacent to each other and fit together perfectly but the two smaller pieces were a few cm away and no points of contact could be confirmed. The long section exposes the inside of part of the shell and is encased in a concretion on the outside, not the usual way these are found. The smaller pieces exposed the outside of the shell in the more common way. The long section is broken along the long axis with approximately one half of the shell missing along one side. There are possible fragments of the missing side lying on the interior surface. The smallest phragmocone has a ventral siphuncle suggesting a Bactrites but an intermediate layer with the finger-print pattern is visible on both short pieces and some of the broken pieces lying inside of the long piece, supporting the possibility of it being Shimanskya postremus instead. At first the absence of apparent cameral deposits on most of the long section suggested it may be the body chamber. Both smaller sections had septa. Evidence of a single cameral deposit at one end on the long piece caused me to think it may be towards the adapical direction and the diameter of the larger phragmacone section was the same size as that end at 29.7mm. The diameter of the smaller phragmacone varied from 20.6mm to 22.3mm. However, the diameter at the opposite end of the larger section was smaller than the end with the possible cameral deposit at 24.9mm. Of course if it were toward the adoral direction it should have had a greater diameter uming the shell continued to increase in size as it grew. The smaller phragmacone was found near the smaller end and the larger phragmacone near the larger end. This makes me doubt that the apparent lack of septa or cameral deposits in the long piece actually confirms that it is the body chamber. It could be that an outer layer is all that is present since that may not have evidence of cameral deposits. Are my assumptions about this specimen correct? If so, is this a common way to see these specimens preserved or is the view of the inner surface fairly unique?
  4. Hi all Just a quick question , I have been very interested in the material from Mazon Creek since I won a great auction lot from Ralph that included a few fine specimens . While looking today online I spotted a trilobite pygidium that was labelled Mazon Creek it looks like the right type of siderite concretions but it could be from some where else . So what do we think? I don’t think they was native to Mazon creek but maybe transported there by floods ?
  5. One more plea for help - and apologies if this is obvious to all the folks here who know their stuff. Found this on the Potomac River near Montross, VA (the Northern Neck area as it's called). Any help or guesses would be very appreciated.
  6. erlon

    What is this?

    Found this laying on the surface of a flat sandy area in southern Maine. I'm not sure what it is.
  7. 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
  8. 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!
  9. 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.
  10. 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 up: the specimen isn't in their collection and the professor who took the photo has since retired -- and supposedly liked to take photos of odd specimens at the Tucson Gem and Mineral Show [direct link to image]: http://skywalker.cochise.edu/wellerr/fossil/gastropod/6fssl-gastropod-turritella2.jpg I think I've seen similar specimens before, but can't recall where... Does anyone know where this piece might be from? I'm hoping the concretion is distinctive enough to be identifiable... Thanks
  11. 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? I have also taken a picture of the specimen around the edge of what seems to be a shell as well for a closer look in case it helps: Thanks!!
  12. 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
  13. 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!
  14. 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.
  15. 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 pile of leaves at the base of a hill. The side with the darker green black seems to be the one with the most potentials for cleaning but I am no expert so wanted to check to see if we are better off just leaving the sides as is. thanks in advance, -tom
  16. 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 here. Maybe it is a shrimp as well? thanks in advance for your help! -tom
  17. 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."
  18. 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 this section so maybe it is possibly coprolite? I do not know
  19. Samurai

    Nodule #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
  20. 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 to others*******
  21. 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.
  22. 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?
  23. 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.
  24. 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,
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