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  1. Hallo all, please can somebody help me with ID ? Cenoman ...
  2. Neon

    Wonky concretion

    Howdy! I was working on this medium concretion that I thought would have been a crab but after reaching little less than half with a hole and not finding anything I decided there probably wasnt a crab in it and cracked it open. After opening it I saw this, looks like just a crab arm but wasnt entirely sure. Theres been two other concretions from this area that seem to only be arms, havnt finished prepping them, and wasnt sure if its common for washington concretions.
  3. Howdy yall! Its been a while sice I posted because on the same day I collected these concretions me and my digging buddy collapsed a chunk of the cliff onto ourselves and broke a few bones (Its all okay now and also congrats to whoever collected the concretions in the rocks). But all I have is a dremel 290 and these are gigantic concretions that I dont think I can prep by myself. I was just wondering if yall though it would be better if I just bit the bullet and got an actual set up or a ball park price to get someone else to prep it (I really want it well done another reason to get someone el
  4. toddf74

    Mazon trip Nov 14, 2021

    Hello fossil hunters! I am asking for some help as a humble beginner. Yesterday I went out with my son (age 14) to a site just south of Braidwood, IL. We were collecting near Ponderosa Lake, to be more precise. This is our second trip out there. The first time we really had no idea what we were looking for, but now we are getting a little more experienced after reading a lot and digging around. In total we found around 60 intact (good shape, in my unprofessional view) concretions, as well as some interesting fragments. We had a nice time collecting yesterday in the cold. We were t
  5. June P

    Any ideas?

    I’m not sure what this is. This little croissant shaped guy struck me as interesting as I was hunting through a pile of limestone in our new construction neighborhood in northern Bexar County, Texas. It’s in northern San Antonio. I thought it might be a shell of some sort. It’s about 4.5 to 5 inches wide and about 1.5 inches in depth. It has striations here and there and a shape that looks like a nautilus, but may just be an interesting concrete on or piece of limestone. Anyone got any ideas or answers? The ‘center’ of the ‘croissant’ has a grayish area that’s really differen
  6. Lone Hunter

    Coprolite, gastropod, or other?

    Found this in creek, Eagle Ford, at first thought it was part of gastropod but after closer inspection it started looking more like coprolite now I'm undecided so I will leave it up to the TFF court.
  7. Cretaceous Eagle Ford concretion that caught my eye, one part of this disc has what looks like strange sutures but this would be one flat Ammonite if that's what it is so I'm stumped.
  8. 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.
  9. KitKat


    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!
  10. 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
  11. 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.
  12. 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
  13. 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 ?
  14. 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
  15. 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!
  16. 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.
  17. 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
  18. 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?
  19. 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
  20. 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!
  21. 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.
  22. 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
  23. 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
  24. 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?
  25. 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."
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