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  1. One of my favorite fossil types. Dinosaur eggs come in all shapes and sizes — from an oval as small as a thumb, to a sphere as big as a basketball. These fossils are often faked by the hundreds, if not thousands, in Chinese factories (China is also the world's richest source of true dinosaur eggs). However, there are also many natural-occurring objects mistaken as dinosaur eggs such as concretions or even fortuitously-shaped rocks. Despite these hurdles, dinosaur eggs remain one of the most desirable of all fossils. NOTE: Dinosaur egg and eggshells, by their nature as an ichnofossil, are challenging for private collectors to identify. None of the IDs I provide here are acceptable on a scientific level as I lack the tools to examine the cross section slices of my eggshells. However, for the sake of documentation I will still provide accurate names and locality here to the best of my ability. First up are my Oviraptorid eggs "Common" Name: Oviraptor egg Elongatoolithus sp. 71 - 66 mya | late Cretaceous Nanxiong Basin, Guangdong "Common" Name: Citipati egg Macroolithus yaotunensis 71 - 66 mya | late Cretaceous Nanxiong Basin, Guangdong Length: 8.78 inches (Note: Has composited eggshells) "Common" Name: Oviraptorid(small type) Nest Elongatoolithus sp. 71 - 66 mya | late Cretaceous Nanxiong Formation Guangdong
  2. Daniel1990

    Ichnofossil or stone?

    Hi Is this ichnofossil? Found: Western Poland, Babimost Best wishes
  3. A short post today, just wanted to upload this interesting Rhizocorallium (?) I found on my most recent fossil hunting trip! It’s still the dead of winter here in Saskatoon, but we had a warm snap recently and I was able to hike out to a local glacial silt exposure and found it. Hoping to return to this site soon and hopefully find more!
  4. Daniel1990

    Ichnofossil or stone?

    Hi Is this ichnofossil or stone? Best wishes Daniel
  5. Nlseal84

    Fossil Id help

    I’m the museum director for a small Texas museum in the panhandle. We are trying to identify this object. Thanks in advance!!
  6. Another day of great finds in Saskatoon! This time, some trace fossils. With my wonderful collaboration with the University of Saskatchewan's Museum of Natural Sciences still continuing, recently I have been very lucky to make multiple trips out to a beautiful site just outside the city of Saskatoon where massive deposits of glacial lake silt are exposed. This silt produces pristine grass and other plant fossils in abundance (I'd like to make a post about them soon as well), but also seems to be teeming with various invertebrate trace fossils. All are very small (under 1 centimetre wide). I've attached some of my best pictures below. 1 - 6: Overlapping Planolites sp. closeups 7 - 11: Edaphichnium sp. 12 - 14: Taenidium sp. closeups 15 - 16: Taenidium sp. wide shots 17: Taenidium sp. closeup
  7. Misha

    Burrowing anemone trace fossil

    From the album: Misha's Late Devonian Fossils

    Bergaueria sp. Burrowing anemones ichnofossils Lock Haven Formation/ Catskill Fm boundary Late Devonian Pennsylvania
  8. Hello everyone, I just got back from collecting some fossil sites in Pennsylvania yesterday. Among these was a Catskill Fm. site, while the fishy finds there weren't particularly plentiful, I did manage to find some other interesting stuff. While there I found these rocks which have unevenly spaced lumps scattered across the surface, on the other side the position of the lumps corresponds with round impressions in the rock. I initially thought this may be something like a layer full of concretions but with the dips on the other side of the rock I was wondering if it may be some kind of ichnofossil? If anyone has any ideas as to what this may be, I'd love to hear it, Thank you for looking! In the field: A closer look at the sample I took with me:
  9. SilurianSalamander

    What kind of burrows are these?

    I found these burrows in Ordovician-Silurian rocks in Waukesha Wisconsin. I found hundreds of these just a few weeks ago in Green Bay WI (Ordovician) any way to identify what animal made these burrows? Thanks! ps: so sorry I forgot the scale
  10. Sauropod19

    Mazon Creek ichnofossil?

    Hello. I found this piece during my first visit to Mazon last year and just got around to asking about it. I believe it may be tracks of some sort, as they look vaguely like other arthropod ichnofossils. I was wondering if anyone may be able to confirm my suspicions and possibly ID what kind of animal it could be. I understand this second part is difficult without anything else to go off of, and I apologize for lower camera quality than the other images I’ve seen here. Thank you!
  11. My geologist friend found this in a limestone layer of the Bridgeport Shale which some call the Jasper Creek Formation, in Run-Away Bay, Texas. Little else was seen along this stretch of shoreline other than trace fossils. It may be a track-way or possibly a feeding trace.
  12. Mahnmut

    Lower permian arthropod trace?

    Hello dear fellow forum members, some time ago I was given the remnants of a geologists expedition souvenirs, without any labels. The piece pictured below was in a box together with a nice example of the trace fossil tambia spiralis, and about the same colour matrix. So I assume it could be from the same location, which may be the famous permian Bromacker quarry. It most resembles Limulus traces as far as I could find though. Described from Bromacker are several species of roaches, but on the other hand, I do not know if it is really from there. Any ideas?
  13. Lucid_Bot

    What is this stuff?

    One of my local spots to fossil hunt has a lot of limestone (I think) with what looks like worms running through it. I see this stuff everywhere and have no idea what it is. The area is definitely Glenshaw Formation and has fossiliferous limestone and shale. Any help is appreciated.
  14. Steph


    Found in Crane Hill, AL (Carboniferous) Could the (presumed) burrows be part of an Asterosoma sp? Thanks for looking
  15. Hi all! I’m considering buying this specimen which is identified by the seller as dinosaur prints from Connecticut, but first I wanted to make sure it’s what it claims to be, and not an instance of pareidolia or similar. I also was curious whether anyone here could offer some additional info on the prints—any guesses on age, formation, more specific locality, ichnogenus, etc.? Thanks in advance. I’m very excited to buy this if none of you have any bad news to offer!
  16. Good morning guys! I really need some advice for one specimen of trace fossil from Triassic, there's here someone experienced in the subject to help me on an identification? I would post here the images but I prefer to have a private conversation about. I apologize in advance if this is not the right section to post this. Thanks to everyone!
  17. I was cleaning up my Platteville finds from last fall and came across this. It in all likelihood is an ichnofossil but if anyone have additional thoughts about it, please reply!! The Platteville has plenty of trace fossils but I have yet to see one with this appearance. Would love to have an idea of it's maker.
  18. Rogue Embryo

    Upper Ordovician ichnofossil

    From the album: Camille's fossils - Georgian Bay Formation

    Field collection by Camille Martin, August 25, 2011

    © Camille Martin

  19. From the album: Camille's fossils - Georgian Bay Formation

    This dumbbell-shaped ichnofossil measures about 7.5 cm long, including the terminations -- considerably longer than the Ordovician and Devonian bifungites specimens described in Pickerill and Forbes, "Bifungites of Halli from the Ordovician (Caradocian) Trenton Limestone of the Quebec City Area" (1977). Field collection by Camille Martin, May 28, 2018

    © Camille Martin

  20. TyrannosaurusRex

    Texas Permian Hunt

    In my continued studies of my local Permian areas, I came across information on a site that I hadn’t been previously aware of. I’m working on a paper describing the outcrops in the areas near to Taylor, Baylor and Archer counties, as well as some close outliers when I come across them. Information on this site Clear Fork (Permian) 298.9-251.902 mya Lots of siltstone at this specific site, which is why there are tracks present. All the fossils came from an area about 10 x 15 ft in an outcrop that has weathered away, there’s lots of siltstone surrounding but the fossils were very specific to one small area of this outcrop. Not entirely sure why this is the case yet, but I’m reading up on it. Lovely view of a pond from atop the hill several feet above the exposure. Looking back down the hill at the localized exposure. A small amount of limestone in the adjacent area. Some of the seed ferns on the ground prior to being picked up. Great spot for splitting the siltstone, the ferns were beautifully preserved in the layers. The haul after being gently cleaned, the siltstone doesn’t stand up well to water at all. Delrnotea Abbotii Seed Ferns I collected lots of examples, but these are some of my favorite. Plant Material There were some examples of layered plant material, perhaps just stems from the seed ferns lying on the ground and decomposing. This one has me stumped, it might be water droplets, but I’m not sure yet. Any information or identification is very welcome! Tetrapod tracks, potentially Laoporus? Other Ichnofossils, they appear to be tracks, and some of them might be arthropod. One looks to be amphibian. Getting lighting to show the tracks is pretty tricky since they wash out under bright light. Some sort of drag marks, very strange. Indeterminate, two toes are clearly visible at the bottom right. Probably not enough to identify. Again, I don’t think enough for ID on some of these. top right This one may not be a track, it lacks the impression that the others have, but it stood out a lot so I picked it up in case. Potential Amphibian tracks, one is smaller and is going the opposite direction of the larger. I’m new to tracks and ichnofossils in general so I could be completely wrong. Not fossils, but these pieces of siltstone were pretty interesting. The white coloration goes completely through the stone. No idea what could cause this. Thanks all!
  21. Earlier this year I was fortunate enough to meet up with @digit in Gainesville Florida where he very graciously provided my wife and I the opportunity to do some matrix fossil hunting in a local stream. We sieved for a good long time collecting many nice shark and ray teeth as well as other items out of the large portion. At the end we nearly filled a five gallon bucket with gravel that we ran through essentially window screen in the creek to get out the silt and clay. My original trip report can be found here: http://www.thefossilforum.com/index.php?/topic/114209-north-florida-fun/&tab=comments#comment-1264293 Back at Ken's house, he was nice enough to sort the bucket of matrix into sizes for ease of picking. We then ran the matrix through 3 stacked sifters since we had already picked out anything caught by the 1/4" screen in the stream. The coarsest material from the sifters would have been caught by the 1/8" screen so (1/4" - 1/8" range). The next finer size range would have been (1/8" - 1/12") and the finest would have been (1/12" - 1/20"). We bagged it up into 3 gallon ziplock bags of coarse matrix, 1 gallon bag of the medium and about 2/3 gallon of the fine matrix. Once home, I dried it out and began the picking and identifying process See some links below for my ID questions and some answers. Thanks to all those that helped. http://www.thefossilforum.com/index.php?/topic/119245-florida-mysteries/&tab=comments#comment-1309402 http://www.thefossilforum.com/index.php?/topic/119097-gainesville-shark-teeth-question/&tab=comments#comment-1305867 http://www.thefossilforum.com/index.php?/topic/119485-small-florida-sharkrayfish-teeth-help/&tab=comments#comment-1310743 So far, all this you have heard or seen before as numerous folks, including Ken, have made many nice posts about sorting and picking matrix for micro-fossils. Some of them are pinned under this Micro topic. What I wanted to impart with this post were the results of my picking efforts, or at least the start of it since I have not gone through all of the matrix by a long shot. But I think I have gone through enough to give a reasonable summary of what can be found in this material. After I have gone through more of it, I can always update the info. You can also search on the forum and find many other excellent posts from members that have looked at this material, but I don't think I have seen a complete summary of what can be found (if I missed it somewhere, sorry). I am not going to post a bunch of pictures of what I found in this thread because I have placed many pictures in an album. Feel free to check it out if interested: My procedure was to pick though the matrix and remove anything that was a fossil, whether I knew what it specifically was or not. After that, the first thing I did was a volume calculation to see what percentage of the matrix is fossil material. Out of the coarsest matrix, the fossils made up 3.2% of the volume, they were a bit less in the medium material (1.9%) and even less in the fine material at 1.1% When you put it all together (remember there is a lot more of the coarse stuff) it comes out to 2.6% of the bucket was fossil material. To me it seems like a small number when I think that in nearly every small scoop I put under the scope I would find numerous fossils. It of course is really only all that interesting if one can compare it to other matrixes, but it gives one an idea of what to expect from this material. My next step was to sort and identify everything. Easy to say, but that was the hardest part since this matrix was new to me. I should be able to do future batches of this stuff much more quickly. Once that was done, I counted the number of specimens of each fossil type and just made a simple spreadsheet of each matrix size. So what did I find? Here is a sample from the coarsest matrix: Keep in mind, most of these fossils are not complete specimens. So for example, while there are 608 Mylobatidae ray teeth, only a small percentage are whole teeth, but if they are in that category there was enough present to be able to ID it. You can see there are over 16% that I know are fossils, but not good enough to be part of one of the listed types or even good enough for me to figure out yet what they are. With more time (and knowledge??) I can probably ID many of those, but that is for another time. Were there differences between the three sizes of matrix? Yes, and I lumped the list of types shown above into broader categories so you can see how the four classes of material (I included the hand collected stuff) compare: And lastly, if you put everything together, you can see what type of fossils you are likely to find in the 2.6% of matrix from the creek: lots of rays, lots of sharks and a smattering of other marine material. That's all. Not sure if anyone else will find this interesting, but I'm sort of a data guy, so it was fun for me to look at it this way. Thanks for looking.
  22. Misha

    Unknown sedimentary structure

    Hello everyone, I am looking to identify an interesting sedimentary formation that I found in the Upper Devonian of Pennsylvania. It was found in an area with many ichnofossils, initially I believed that it was geological in origin and that it was just some interesting structure that the sandstone formed. I asked a few people who are much more knowledgeable on geology than me and got mixed responses, some said it was small scale soft sediment deformation, others thought it may be some kind of ichnofossil. I wanted to ask on here if anyone else has any ideas, geology and ichnology are not things I am that familiar with so I have no idea as to what it may be. Any help is greatly appreciated, Thank you
  23. While I am out in the badlands of the San Juan Basin, I keep an eye out for the trace fossil known as Asthenopodichnium...lozenge shaped overlapping pouches or cavities found in petrified wood. My first encounter with it was a number of years ago in an outcrop of Upper Cretaceous Menefee Formation. I threw a chunk of wood, with this very interesting texture, in my bag and took it home. Perplexed by what it might be, I showed it to Spencer Lucas at the New Mexico Museum of Natural History. He was happy to see this specimen and we discussed the theories of what it might represent, as it is not fully understood. We wrote up a small abstract with a few other co-authors for a Geologic Society meeting and since then, I have looked for other specimens while wandering. In 2015, some specimens found in the Upper Cretaceous Kirtland Formation of the San Juan Basin were published in the NMMNHS' Bulletin 67 and are the first published record of these trace fossils in the Kirtland. The following is a link to that paper. The trace fossil Asthenopodichnium from the Upper Cretaceous of the San Juan Basin, New Mexico On a recent adventure, with @Opuntia, in the Kirtland Formation of the San Juan Basin I stumbled upon these... ...and was delighted. I couldn't wait, and texted the photos to Spencer. His response was "collect it!" In later conversations he asked where the specimens were and we discussed their location, a potential small paper and started planning a return trip to document them. Excited, I sat pondering the fossils and referred back to the paper. As I looked at the field photo in the paper I noticed a rock in the frame...I had seen that rock. I compared my field photos to the publication's and realized that I was looking at the same locality. Publication field photo: PFOOLEY's field photo: This left me feeling a bit deflated as there would be no need for collection nor a small paper. I began to think back to the time, all those years ago, when I first encountered this trace fossil in the Menefee...I'm going back there and can hopefully relocate that site...might just have a small paper in store after all. I post this here to see if any of you have seen this trace or maybe just some thoughts on this fascinating fossil. Got Asthenopodichnium?
  24. From the album: Lando’s Fossil Collection

    Scoyenia spp. burrows from the Triassic Pekin formation of Sanford, NC.

    © Lando_Cal_4tw

  25. Hello everyone! ive got three slabs of prints created by an unknown prehistoric animal (if it’s even created by an animal) that had been in my collection for quite some time now. Since I’m on the forum and still requires a proper identification for it any identification help from ichnofossil experts are much appreciated! Here are some pictures of the fossils but since the prints might not be that clearly seen I uploaded some other pictures highlighting the “lumps” or the pattern made by the print. Hope that helps.
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