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  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

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  1. Oxytropidoceras

    Is Brooksella Even a Fossil?

    This Strange Ancient 'Fossil' May Not Have Been Left by Any Living Thing Carly Cassella, ScienceAlert, Nature, February 25, 2023 The open access paper is: Nolan, M.R., Walker, S.E., Selly, T., and Schiffbauer, J. 2023, Is the middle Cambrian Brooksella a hexactinellid sponge, trace fossil or pseudofossil? Peer J. Yours, Paul H.
  2. Denis Arcand

    Trying to ID some colored spot on rock

    I don't know if they are traces fossil or geological in nature, do you know what these spots are? The period is Late Ordovician Thanks! #1 #2 #3
  3. Extraordinary soft-bodied fossils highlight the Cambrian explosion Derek Briggs, Yale University The Cambrian Explosion and the evolutionary origin of animals Professor Paul Smith, Oxford University Museum of Natural History What triggered the Cambrian Explosion? Professor Rachel Wood, University of Edinburgh Virtual palaeontology: bringing the first animals to life in 3D Dr Imran Rahman, Oxford University Museum of Natural History An alternative reading of the history of life using trace fossils Professor Gabriela Má
  4. Scientists Are Perplexed by Mysterious Holes They Keep Finding on The Ocean Floor Fiona MacDonald, Science Alert, July 29, 2022 The Case of the Mysterious Holes on the Seafloor NOAA Ocean Exploration Updates, July 27, 2022 Open access paper. Vecchione, M. and Bergstad, O.A., 2022. Numerous sublinear sets of holes in sediment on the northern Mid-Atlantic Ridge point to knowledge gaps in understanding mid-ocean ridge ecosystems. Front. Mar. Sci., 31 January 2022 Sec. Deep-Sea Environments and Ecology. https://doi.org/10.3389/fmars.2022.812915
  5. Looking for guidance on what to collect today. 1/2 - Could this be pet wood or is there decent potential for fossils in this piece? I put bit of lichen to mark some areas I found interesting (potential marine fossils?). I could leave in place, peel off another layer, pour done water on it, or move on? 3- About same size as 1st one. Multiple trackways or insect burrows? For now, Collect or leave it? 4- hmmm, burrow or stem looking, but all pointed in same direction. 5/6-Not sure, but does not look weathering. AHH SNIKIES! I think that is poison oak & o
  6. I was able to take another trip to the Leighton Formation today! It's been a while since I've been able to visit (months and months), but I've finally been able to. Unfortunately, during the winter the place is completely covered in snow and ice. Not really the best collecting conditions... My last trip there was in August of last year, and the spring has been very busy. Today it was time. It was supposed to be overcast with a chance of rain, but it came out sunny and bright. Absolutely beautiful day out. The collecting was very g
  7. Almost there! Over 270 pages of full color fossils from the Pennsylvanian of North Texas The long-awaited sequel to the Pennsylvanian Fossils of North Texas (2003) Available Q4 2015 in hardcopy, digital and e-reader formats.
  8. ClearLake

    Florida Mysteries

    Here is (hopefully) one last post to help me identify some items I found while searching through the micro matrix from a Gainesville creek that Ken @digit was nice enough take us to. Some other items have been covered in previous posts:; http://www.thefossilforum.com/index.php?/topic/119097-gainesville-shark-teeth-question/&tab=comments#comment-1305867 http://www.thefossilforum.com/index.php?/topic/114209-north-florida-fun/&tab=comments#comment-1264293 The matrix comes from a creek in Gainesville, Florida and most of the fossils are from the Miocene aged Hawthorn
  9. The world's oldest fossilized forest is in Greene County. It needs saving. Roger Hannigan Gilson, Times Union, Aug. 5, 2021 The world’s oldest known fossil forest has been discovered in a quarry in upper New York state By Kelly Murray, CNN, December 20, 2019 The open access paper is: Stein, W.E., Berry, C.M., Morris, J.L., Hernick, L.V., Mannolini, F., Ver Straeten, C., Landing, E., Marshall, J.E., Wellman, C.H., Beerling,D.J. and Leake, J.R., 2020. Mid-Devonian Archaeopteris roots signal revolutionary change in earliest fossil fore
  10. Tetradium


    From the album: Ichnofossils of Platteville to Decorah Formation Twin Cities

    One of the largest most complete Rauffella palmipes feeder burrow fill I have ever found. I hadn't heard of any other trace fossils yet that comes close to this weird one. The invertebrate animal that leaves them makes overlapping spoon shaped burrows with one entry hole.
  11. First of all I want to make it clear that I know what are trace fossils an I know the difference between fossils and trace fossils, but I feel like I am missing something. In a few posts here on the forum I saw people saying things like "this is not a fossil, maybe a trace fossil" and things like this and I do understand that regular fossils give more information but can anyone please explain to me why it seems like trace fossils are worthless compared to regular fossils?
  12. Newly discovered fossil named after U of A paleontologist By Andrew Lyle, Univeristy of Alberta Research News, January 26, 2021 https://www.ualberta.ca/folio/2021/01/newly-discovered-fossil-named-after-u-of-a-paleontologist.html https://www.eurekalert.org/pub_releases/2021-01/uoa-ndf012621.php https://www.sciencedaily.com/releases/2021/01/210127093217.htm The paper is: M. Ryan King, Andrew D. La Croix, Terry A. Gates, Paul B. Anderson, Lindsay E. Zanno. Glossifungites gingrasi n. isp., a probable subaqueous insect domicile from the Cretac
  13. Bradley Flynn

    Upper Devonian trace fossil ID

    Hi all So I took some pictures of some very interesting trace fossils. They are found in the upper Devonian, frasnian, Witteberg group, Swartruggens formation. Is it possible to get an identification on these?
  14. Found this piece on a walk near a Triassic outcrop in Pennsylvania, has a pretty exact visual similiarity to the wing rib of a Triassic reptile but is likely just some form of sedimentary trace. It would be great to get some more opinions on this piece to see if its worth holding onto or I would label it to be definitely sedimentary and rid of it, which I feel is the case.
  15. Took me a little while to post this trip report, I'm always a busy person. This trip is from October 3rd, 2020 in Ellsworth County, Kansas at a reservoir. The predominant formation at the site I visited is Kiowa formation; which is known for marsh and delta environments in the early Cretaceous (Albian). I found some interesting things and I'll show below. Possibly some carbonized wood materials. Lignite or coal? It was flaky and would crumble if touched. It left some black powders on my hands after handling it. I found several large pieces of them together and partly encased in con
  16. Finally ... a short trek on the open prairie of Eastern Colorado and into a slice of the Cretaceous period. This was my first true jaunt since my move from the East coast and it was a welcome change to my normal routine. My journey really began several years ago when I purchased some shark teeth from a fossil forum member in Colorado. He regularly visits a site on private land in Eastern Colorado that contains (what we think) are exposures of the Fox Hills fm. , and are chock full of marine fossils from that time period. I contacted him several weeks after I arrived, desperate to
  17. Oxygen levels also important in biodiversity of trace fossils. https://phys.org/news/2020-08-ancient-life-story-early-diversity.html
  18. I have found scattered limestone clasts with submillimeter holes in them. I pick them up wondering if they are stromatoporoids, bryozoans, sponges or the like. The holes do not extend into the interior of the rock. Some of the rocks have lichen and algae growing on them. I finally found a soft dark lichen or algae growing in the holes in the rocks. Let me know if anyone can tell whether the dark spots are lichen or algae. If they are the cause then the rock exhibits bioerosian. Bioerosian was first described by Conrad Neumann in 1966 as “the removal of consolidated mineral o
  19. Hi all, Once again we are back from a weekend of fossil sleuthing in south eastern Arizona south of Tucson. The Upper middle cambrian Abrigo formation is mostly limestones, but the lowermost member is either a dark grey shale, or green glauconitic micaceous shale. Gorgeous stuff! Three main localities were visited - the 80/90 Roadcut (mostly trilobits and brachs), Ajax Hill near Tombstone (trilobits), and and area near Colossal Cave just south of Tucson. (tons of trace fossils). Trace fossils are very abundant in both the Abrigo Formation and the slightly older Bright Angel Sh
  20. Fossil footprints found in Sydney suburb are from the earliest swimming tetrapods in Australia by Phil Bell, University of New England https://phys.org/news/2020-05-fossil-footprints-sydney-suburb-earliest.html Roy M. Farman et al. Australia's earliest tetrapod swimming traces from the Hawkesbury Sandstone (Middle Triassic) of the Sydney Basin, Journal of Paleontology (2020). DOI: 10.1017/jpa.2020.22 https://www.cambridge.org/core/journals/journal-of-paleontology/article/australias-earliest-tetrapod-swimming-traces-from-the-hawkesbury-sandston
  21. Bonehunter

    Trace fossils or water residue?

    So- been starting to look for my first conodonts in black shale in the Kansas City area and I commonly see what appears to be mineral deposits left when water seeps through layers, then dries, but these are in winterset limestone (as best I can tell) and while they look similar, maybe these are trace fossils? thanks for taking a look! Bone
  22. BenWorrell

    Devonian Burrows? Fish Poo?

    ID help please! I recently found these strange features in a Devonian rock in Johnson County, Iowa. They are unusual looking enough that I suspect an animal may have been involved in their formation. My first guess was that they were burrows that had filled in with dense crinoid and shell debris, but I'm not sure how that would happen. My second guess was that it could be poop/coprolite from a fish or some other Devonian creature. I didn't have a scale with me, but these would be very large for fish poop. I will post another photo in a separate post below (files are too big). I wou
  23. Rexofspades

    Trace Fossils from Miocene Potomac

    Hi, longtime lurker first time poster here. I was wondering if you guys can help me ID this concretion my family found years ago near Calvert. I believe it might be a trace fossil of some kind, possibly a burrow or tunnel. I have found similar types at Westmoreland State Park. I can upload pictures from different angles if needed. Any suggestions of what it could be?
  24. Had a great day getting out this weekend and exploring some cretaceous clay outcroppings along the creek bed. Lots off impressions of shells but other interesting things that I don't recognize. Are they anything other than erosion patterns? I have more photos if needed. Thank you! ay ge I think the top is some type of shell but what about underneath?
  25. Hello everyone, I am in desperate need of help with a huge debate I have been having with a friend over fossils preserved in ironstone concretions. From some of what I had read to some advice from other members I it possible to find vertebrate bone among shells and other mollusks preserved in an ironstone concretion. Whether it leaves a trace of the organism, morphs the organic material into the structure of the iron concretion through the decomposition with preserving, or whatever else it may be it seems to be possible. So recently I have hunted a place known to have recorded mar
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