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Found 171 results

  1. Coprolite Identification

    Rather than writing information about coprolite identification on multiple threads, I thought I would post information about coprolite identification here so it can be referenced in ID threads (I'm getting lazy, I know). I was also thinking it might be fun for others to post coprolites in their own collections so others can use them for comparison. So here we go: IDENTIFYING COPROLITES: Not all rocks that look like poop have a fecal origin. Here are a few things to consider when trying to make this determination: 1. Location, Location, Location – If you haven’t guessed, the first and most important thing to consider is the location your rock was found. Don’t expect to find a coprolite unless you find it in geologic area/layer where other fossils are found. If you find things like bones, teeth and fish scales, or prehistoric tracks, you may just be in in luck. 2. Shape – While fecal matter can be rather freeform when exposed to the elements or when digestion issues arise, most coprolites are shaped like poo. As with modern extrusions, fossilized feces can be shaped like pellets, spirals, scrolls, logs, piles, etc. Their shape is dependent on shape of their producers intestinal and anal structure. Look for things like compaction folds and pinch marks. 3. Texture - Most coprolites are fine grained. If your specimen appears granular under magnification, it is most likely not a coprolite. There are some exceptions, such as marine creatures that feed on bottom sediments or coral. That is why knowing the location and geology of the area where it was discovered is so important. 4. Inclusions – Many times, coprolites will have visible inclusions. Things like fish scales, bone fragments, and teeth may not get fully digested, and can be visible on the surface. Some animals ingest stones for ballast or digestive purposes. These are known as gastroliths, and if present, are generally smooth. 5. Composition – Because herbivore scat tends to break a part and decompose rapidly, it rarely survives the fossilization process. So most fossil poo that is found is from carnivores. The reason for this is that their poo is usually high in calcium phosphate, the same mineral found in our bones. This mineral can appear in many forms. It can be hard and dense or soft and porous. If the potential coprolite appears soft and porous, there is a quick test that is often used in the field. If you touch to stone to the tip of your tongue and it sticks, chances are, it is high in calcium phosphate and could be a coprolite. If you are not that brave, you can also touch it with wet fingers to see if it feels sticky, but this is not nearly as fun. If the calcium phosphate takes a harder, denser form the “lick test” won’t work. In some instances, chemical analysis is required to definitively identify the mineral composition. @Carl do you have anything you want to add?
  2. Coprolite?

    Another one i found while hunting native American artifacts. Thanks for helping railguy
  3. Madagascan coprolite. Actually dinosaur?

    This is a small coprolite specimen from Madagascar. Just two questions: 1. Is this actually from a dinosaur or is coprolite just sold as "dinosaur" dung but in reality from any animal? 2. Due to its size surely its from a relatively small species or an infant larger species. Rahonavis too far fetched?
  4. Coprolite or ...?

    I wonder what is it ? If coprolite or something else. Thank you for any help
  5. Hello, yesterday they gave me a coprolite, I never had any, so I do not know if it's real. regards
  6. I was out hunting near Spring Valley, Minnesota with @Bev and @minnbuckeye the last couple of days. As always, I was looking for coprolites. Mike came across this first piece, sitting loose in a piece of weathered matrix. While we were splitting rocks, we found a virgin layer of the source matrix. When we got back to Bev's fossil barn (everyone should have one), I took a peak under the microscope at two of the loose, irregular objects but couldn't really see much because of the powdery iron oxide coating. When I lightly rinsed them, they revealed these microscopic (calcareous) jack-shaped objects. Similar inclusions were in both objects loose objects. You can see from the broken spine on the inclusion in the lower right that they are hollow. In the other loose piece and those still embedded in the matrix, I can also see random straw-like spines of the same material. I'm not sure if these are coprolites, algal masses or something else. I have seen coprolites covered in powdery iron oxide before. Eventually I would like to free more of these from the matrix so that I can sacrifice one to get a look at the interior. Can anyone identify the little jack-shaped inclusions? The spines may have been quite a bit longer. The only things I can think of are forams or perhaps diatoms. Bev and Mike - What was the name of that cliff again? Decorah Shale? @Carl
  7. Shark coprolite?

    Is this coprolite? Found in GMR - Pitt County, NC. Initially thought it might be a tooth from a shell crushing mosasaur (globidens). Very worn piece - could not get a good photo with my camera.
  8. Possible STH coprolite

    I found this earlier this year, can't figure out what it is. The more I look at it the more I think coprolite. Let me know what you think.
  9. I just received this amazing piece of Burmese amber yesterday. The seller thought the long strands were pine needles, but I think they are segmented coprolites from an insect/larva similar to that of the modern sawfly larva. While, I'm pretty good at spotting fossilized fecal matter, I'm not so good at bugs. I'm hoping someone here can help me ID the insects and mite so that I can confirm this dates to the Cretaceous. 1. Can anyone tell me what this one is? It was identified by the seller as a sand fly. I'm hoping the terminal appendages (hopefully I'm using the correct terminology) might be diagnostic. 2. Next is this little flying insect (the wings are really hard to see), that was identified by the seller as a wasp. It looks more like a flying ant to me, but I know next to nothing about bugs. 3. This one looks like a mite to me, but was not mentioned by the seller. 4. The boxy shape of this one looks like a smaller version of what I've seen identified as "bark beetle" in Dominican amber. However, I haven't been able to find anything similar Burmese amber.
  10. Coprolite

    This is from Charmouth, Dorset, UK. OK, its obviously a Belemnite in there but the texture of the matrix made me wonder if this is coprolite?
  11. I picked this little nugget up quite a few years ago, during my early infatuation with coprolites. All I know about it is that it was found near Price, Utah. I have siderite "formations" from around the world. This is the only one I've seen that looks like it has an inclusion (or should I say the cast of an inclusion). There has long been a debate as to whether siderite rocks such as these are coprolites, casts of voids (fecal and otherwise, or iron-rich mud extrusions (what I like to call "Earth poop"). My questions are: 1. Does anyone happen to recognize what formation this might have come from? 2. Does anyone recognize the tubular structures? The only thing that comes to mind for me are worm tubes, but I don't know if there are any marine environments represented near Price, UT. As always, thanks for your help! @Carl
  12. NSR Mix

  13. coprolite or only pyrite?

    I have found this pyrite piece With a very strange shape,is it only pyrite or ? coprolite?or?
  14. I went on a 6 1/2 mile kayak adventure with a couple of friends on the North Sulphur River. We started off the day at 7AM by seeing 2 bald eagles and almost getting one truck stuck in the mud. We managed to get the truck out and started our adventure. As soon as I got down by the bridge I found one of my best artifacts to date and a nice piece of mastodon tooth enamel. We got a mile or so in and something made me ask my friend if he had the keys to his truck that was parked 6 1/2 miles downstream? Lol he had left them in the other truck without thinking. He went back and got his keys and the adventure begin. We saw very little footprints the entire trip. We didn't find many artifacts but I filled up a 1 gallon ziplock with mosasaur bones and other random fossils. One of my friends found his first shark vert, mosasaur vert and point so he was really excited. I gave my new hunter friend all my lower quality items and didn't bother taking pics of them. The water was low in some places so we had to drag the kayaks a lot but it was fun. We were finding so much stuff that we realized we would never make it the other vehicle before night if we did not quit hunting and paddle. It was so hard passing by untouched bars lol. We managed to make it back to the bridge by 7PM which was 12 hours later. Getting the kayaks up the steep bridge at the second location took all 3 men and a long rope. I got home at 9:30 PM. I'm sore but found some great fossils and artifacts. My phone died early in the trip so I missed out on some great pics. For some reason I can only post a few pics at a time since the latest update.
  15. Found this nice coprolite with a tiny shark tooth visible. Found last week in the North Sulfur River. The pictures don't do it justice unfortunately...
  16. Miocene Coprolite

    Hi Folks, I found this suspiciously looking piece of something yesterday. Anyway with all the knowledge on this board I will throw this piece of something out there for you all to identify. It is quite a large specimen about 5” + 3” and over a pound in weight. Also I should add I found this specimen on Brownies beach in Chesapeake Beach Maryland. Thanks Cliff Dweller
  17. Pierre Shale Coprolite

    Here is another coprolite. Wondering if the class of organism that defecated it can be determined. I found it in a particularly desolate (in terms of fossils) exposure of Pierre Shale (late cretaceous) in NW Nebraska. It was the only fossil I found in 2 hours of hunting. Pic to left shows close-up with fish bone inclusions. @GeschWhat
  18. Niobrara Coprolite

    I am wondering if any more information can be gleaned from this specimen beyond "coprolite". Bony fish? Shark? Mosasaur? Niobrara fm., Cretaceous. NW Nebraska. @GeschWhat
  19. Good Night to everyone from my favorite Forum! I'm very curious about this specimen. According to the seller's description, this is a coprolite discovered in beds of Kem Kem. This is real? Is it from a carnivore or herbivore? Could it be a dinosaur?
  20. I have finally had a chance to start looking at the poop I won in @sixgill pete's shell game. Something about the inclusion in this little nugget looks familiar, but I can't quite place it. Maybe it's just because it looks a little like the dried and flattened frogs I see in my daughters driveway. It was found by the aforementioned esteemed forum member along the Cape Fear River and is believed to be from the Bladen Formation (Black Creek Group). Ideas?
  21. I picked up a new poo (at least I'm thinking it's poo) at our favorite auction site. The only think I know about it is that it was found in Mountain Creek, Texas. There is a shark tooth and bivalve impression on the bottom. I'm hoping this might be diaagnostic. Can someone identify the shark tooth and bivalve impression? Any idea what formation these are from? As always, thanks a bunch for your help!
  22. Coprolite? Jacksonville, Florida

    Title says it all. Never dealt with coprolites before. What do you guys think?
  23. I have a coprolite that has me somewhat puzzled. It was found in a river in South Carolina and dates Miocene-Pliocene. I picked it up at the Tucson Gem Show because I thought it resembled some east coast coprolites with longitudinal striations/furrows/grooves that @MarcoSr posted a while back. Now that I've looked at it for a while and done a little prep work, I'm not so sure the grooves are sphincter related. There are intestinal muscle marks visible on one side, but they don't seem to match up with the grooves. The grooves were filled with sandstone/limestone. I left matrix in the deeper portions to preserve the integrity of the specimen. Across from the grooves are what look like puncture marks. My first thought was that they were clam borings. However, they do line up with the grooves in question. Now I'm wondering if these could be tooth marks as well. Under magnification, I noticed smaller tooth marks and an impression that I can't figure out. My imagination is now getting the best of me, and I'm seeing food chain activity. I'm seeing a big fish nabbing a small fish that was nabbing an invertebrate that was feasting on feces. Do you think the larger grooves and holes could be tooth marks? Does anyone have any idea what could have left the impression? The only thing I could think of is some sort of mollusk. Love your thoughts on this. @Carl
  24. Poo Question

    Found a few chunks of coprolite at the NSR and noticed two of them have similar markings. Any idea what would have caused this?
  25. Possible Poop From Brownie's Beach

    Calling all poop people! This is from Brownie's Beach, so Miocene era. I actually thought it was dog poop at first, and had some choice thoughts about the person who didn't clean up after his/her dog. Then I looked closer, poked it, and discovered it was rock, so into my pocket it went. I find the whole field of coprolites to be really tough with IDing, as no two poops seem to be alike. I do a lot of my IDing by cross-comparing pictures online using my trusty pal Google, and this is one where I'm not finding anything that gives me an "aha!" moment. But it looks like feces, and I'm guessing shark based on where I found it. I'm not licking it because if someone comes back and tells me it's really dog poop then -- ugh! Let's not go there! So help me, experts of the Fossil Forum! You're my only hope!
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