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Found 31 results

  1. Found this partial tooth a few years ago in some Holo-Pleistocene marine sediments on Oahu, Hawaii. There is also the chance that it is more recent, as there had been some dredging in the area, though I haven't seen any evidence at this location. Approximately half of this tooth is missing. What remains is half of the crown and one root lobe. It is 17 mm in maximum dimension. My guess is carnassial. Seal? Canid? Appreciate any and all input.
  2. Ancient life awakens amid thawing ice caps and permafrost By Daniel Ackerman, The Washington Post, July 7, 2019, https://www.washingtonpost.com/science/ancient-life-awakens-amid-thawing-ice-caps-and-permafrost/2019/07/05/335281f8-7108-11e9-9f06-5fc2ee80027a_story.html Aulacomnium turgidum - Swollen Thread-moss PDF file - https://rbg-web2.rbge.org.uk/bbs/Activities/mosses/Aulacomnium turgidum.pdf Wikipedia - https://en.wikipedia.org/wiki/Aulacomnium_turgidum The papers are: Roads, E., Longton, R.E. and Convey, P., 2014. Millennial timescale regeneration in a moss from Antarctica. Current Biology, 24(6), pp.R222-R223. https://www.sciencedirect.com/science/article/pii/S0960982214000864 La Farge, C., Williams, K.H. and England, J.H., 2013. Regeneration of Little Ice Age bryophytes emerging from a polar glacier with implications of totipotency in extreme environments. Proceedings of the National Academy of Sciences, 110(24), pp.9839-9844.s https://www.pnas.org/content/110/24/9839 Yours, Paul H.
  3. Vertebra id

    Besides of the tooth and several other bones I also found some this vertebra: I am really not sure if its a mammal vert or something. Is it even fossil? I have my doubts.... Its from the area of Ijmuiden (Netherlands), so its probably from the Holocene. Can anybody help on the id? Again perhaps @LordTrilobite or @Harry Pristis ?
  4. Fossil zooplankton indicate that marine ecosystems have entered the Anthropocene. Center for Marine Environmental Sciences, University of Bremen https://www.sciencedaily.com/releases/2019/05/190528120605.htm https://www.eurekalert.org/pub_releases/2019-05/m-cf-fzi052319.php https://natureecoevocommunity.nature.com/users/260397-lukas-jonkers/posts/49174-fossil-zooplankton-shows-that-marine-ecosystems-have-entered-the-anthropocene The paper is: Lukas Jonkers, Helmut Hillebrand, Michal Kucera. 2019. Global change drives modern plankton communities away from the pre-industrial state. Nature, 2019; DOI: 10.1038/s41586-019-1230-3 http://dx.doi.org/10.1038/s41586-019-1230-3 Yours, Paul H.
  5. benthic ecology

  6. Maybe ancient mammal bone

    In addition to the possible orthocone fossil I found in the same creek, I found this mammal bone. I live about ten miles as the crow flies from Big Bone Lick State Park in Kentucky. I live on a cattle farm (have had horses on the farm before as well spanning at least 50 years). This bone struck me as looking quite old due to the coloration and the slight erosion on it. With me living on a cattle farm, I’m leaning towards it being some sort of bovid bone, but want to know your all’s opinion. Thanks!
  7. Fossilized Arizona Human Footprint (?)

    Let me start this off with two disclaimers: 1- I am sorry if this post would be more appropriate on an archeology forum. I would think that it would be fine here, however, because the "footprint" impression does appear to be fossilized. And because I have yet to join any archeology forums. I anyone has a recommendation for a good archeology forum let me know. 2- Being almost entirely engulfed in learning about just the Cretaceous of my local area, paleoanthropology is a bit out of my purview. So bear with me if I sound like I don't know what I am talking about. Because I don't. I feel more comfortable with ammonites and Ptychodus. On Wednesday night my mother brought to my attention a post by a Facebook friend of her's, Kevin, who was recently out leading a group of 4-wheeler enthusiasts along some extremely remote Arizona desert trails when he happened upon what appears to be a fossilized human footprint. He really enjoys the rugged beauty of the deserts of the southwest and has been leading groups on such 4-wheeler outings for many years. Because he doesn't have a TFF account and because his Facebook page is private, I am posting this for him. I don't know if this is a real print or, even if it is, that it would be a significant find. I just thought that it wold be appropriate to check with TFF now before it eventually erodes away, just incase it is important. My mother has been friends with Kevin on Facebook for years, and his association with our family goes back to him knowing my great-grandparents at their church in Parryton, Texas decades ago. From that long association, he seems to be the type of person that has neither the inclination or time to be faking tracks. His interest is in exploring the desert, not perpetrating weird hoaxes. My concern is not that he faked it, but that perhaps some other unscrupulous person, apparently with a lot of talent, came along the trail and did it. When this fossil piqued my interest I asked him if I could post this to a fossil forum that I belong to and he gladly allowed me to, saying that he hopes to learn as much about it as he can himself. During our conversation, he also said that he found it, "out in the middle of nowhere near Quartzite, AZ." Along with the pictures of the impression he wrote, "While I've seen several dinosaur footprints this is the first human one I've seen preserved in sedimentary rock. I'm always amazed when I think of all of the circumstances that had to come together for this to occur. Of course, I have no idea how old it is. I have been under the impression that Native American tribesman that might have roamed these area were small people, partially based on the size of the doorways in dwelling I've been to in Utah. This print is an adult and looked to be about a size 10 [about 25 to 28 cm long]. Perhaps this is older or more recent. No telling. But still impressive." To my untrained eye I don't see any obvious signs that this is faked, but I would like to know what you think about it. His didn't indicate the presence of any other tracks in the area, so either he missed them, the others are already weathered away, or more are still buried. Again, my knowledge of paleoanthropology is still wanting, but from reading theses articles (here, here, here, and here), I gather that human tracks in North America are rare but, as I see from the first article, they are not unheard of in Arizona. The first article is on a multi-track site just north of Tucson. And from the pictures in the articles, Kevin's would seem to be a very well preserved specimen if it is real. Interestingly, Mancos shows that the geology around Quartzite is very similar to that just north of Tucson, even though Quartzite is about 200 miles to the northwest of Tucson. The geology around Quartzite and Tucson is mapped as Quaternary surficial, with the age range listed as from the Gelasian (1.8 Ma) to modern holocene. Here are the only two pictures of the impression that he posted, along with his pictures of the surrounding scenery of the area. I am also including pictures of the Mancos map of the areas around Quartzite and Tucson. Hopefully the pictures are enough to at least say whether or not it is worth further investigation or an obvious fake. Thank you for your time. Fig. 1 Fig. 2
  8. the paleolimnology of a Holocene lake

    here THE SUBFOSSIL ALGAL FLORA OF THE LAKE BOLLING SØ AND ITS LIMNOLOGICAL INTERPRETATION BY E. FJERDINGSTAD København 1954 Det Kongelige Danske Videnskabernes Selskab Biologisk Skrifter,Bind 7,n.6/1954 large!!!!: 37 MB I need/would appreciate help in tagging AT LEAST PeatBurns! ampersand etc.. For anyone focusing on The Bolling* interstadial,this might(should?) be interesting *diacritic omitted
  9. If You Hate Ice Ages, Thank a Farmer

    Ancient farmers spared us from glaciers but profoundly changed Earth's climate University of Wisconsin-Madison, September 6, 2018 https://www.sciencedaily.com/releases/2018/09/180906141507.htm If You Hate Ice Ages, Thank a Farmer Chopping down forests and irrigating rice paddies boosted greenhouse gases enough to prevent the onset of a new ice age Ronald Bailey|Sep. 10, 2018 2:05 pm https://reason.com/blog/2018/09/10/thank-a-farmer-if-you-hate-ice-ages The papers are: Vavrus, S.J., He, F., Kutzbach, J.E., Ruddiman, W.F. and Tzedakis, P.C., 2018. Glacial Inception in Marine Isotope Stage 19: An Orbital Analog for a Natural Holocene Climate. Scientific reports, 8(1), no.10213. (open access paper) https://www.nature.com/articles/s41598-018-28419-5 http://discovery.ucl.ac.uk/10053186/1/Vavrus_Glacial.pdf Ruddiman, W.F., 2003. The anthropogenic greenhouse era began thousands of years ago. Climatic change, 61(3), pp.261-293. http://users.clas.ufl.edu/rrusso/gly6932/ruddiman_03.pdf http://www.whoi.edu/cms/files/ruddiman03cc_68543.pdf Yours, Paul H.
  10. Thalassina anomala, Herbst, 1804

    Given to me by a member of the Australian Fossil Club. Will add more information about the formation soon.
  11. Spisula sp. (Gray 1837)

    Shell preservation.
  12. Macoma balthica (Linnaeus 1798)

    Shell preservation.
  13. Cerastoderma edule (Linnaeus 1798)

    Shell preservation. There are also one or two Macoma balthica and Spisula sp. bivalves on this plate.
  14. Since the upload of Part 1 succeeded, I'll now offer up Part 2, a look at two interesting taxa from the family Globigerinidae. This family contains most of the taxa that we associate with the idea of "planktonic forams", perhaps due to our familiarity with the "globigerina oozes" that form a significant part of the floor of the modern world oceans. Globigerinoides ruber (d’Orbigny, 1839) is one of the two “red” species of globigerinids, as the specific epithet indicates. It is well-known that the color of individual specimens varies from white to pinkish-red, and it is typically the case that only some of its globular chambers exhibit the red coloration. I have specimens with all white chambers, one red chamber, two red chambers, etc., and have a single individual that is all red. Interestingly, the intensity of the color seems to increase with the number of chambers affected, so the all red specimen is very red indeed -- it is also a little smaller than average. Here is a typical specimen seen from the umbilical side, in a slightly oblique view, showing the primary aperture and one red chamber: The genus Globigerinoides differs from Globigerina in that its species exhibit secondary apertures, formed at the junctions of the spiral suture with intercameral sutures: Here is the spiral side of the same specimen, again presented in an oblique view, with two supplementary apertures, two red chambers at the left, and a pale pink one at the right. The top, final chamber is white, as is most frequently the case. This taxon is the commonest foram in the sample, by a large margin. The other red globigerinid is Globoturborotalita rubescens (Hofker, 1956). According to the World Foraminifera Database, it also occurs in the Gulf of Mexico, but I have seen no specimens in my sample as yet. This taxon shows four chambers in the umbilical view, rather than three, and lacks the secondary apertures. A second interesting globigerinid, quite different from the preceding, is Globigerinella siphonifera (d’Orbigny, 1839). This genus exhibits planispiral forms, rather than trochospiral -- all of the chambers are in the same plane. (Actually, the test begins growth in a trochospire, but quickly switches growth pattern to planispiral.) There is a primary aperture at the base of the final chamber, and in fully mature specimens like this one, the initial chambers enter the final one through the primary aperture: The final chamber appears to be “gobbling up” the initial chambers, like the snake that swallows its own tail. In Part 3 of this entry, I’ll examine three taxa from the Family Globorotaliidae. Stay tuned.......
  15. Planktonic Foraminifera are particularly important in biostratigraphic studies and correlation, as they are ubiquitous in marine deposits, and evolve rapidly. They first appeared in Middle Jurassic time, and thus have a long geological history. There are many phylogenetic and correlational studies available, and their rapid evolution makes them exceptionally useful as temporal markers, or guide fossils. I am currently looking at planktonic Foraminifera from a deep-water sample that was collected from the Dry Tortugas Islands, off of the coast of southern Florida. The sample was dredged from a depth of 215 meters, due south of the islands. This is an interesting area, as it represents the eastern extremity of the Gulf of Mexico, as well as the northern edge of the Caribbean Sea. The sample is a very rich one, with numerous species of benthic Foraminifera, as well as a few ostracodes. There is a good selection of planktonic forams -- I have thus far identified ten species, and would like to discuss one of these, a member of the Family Pulleniatinidae. Pulleniatina obliquiloculata (Parker & Jones, 1862) is a rather unusual looking taxon, starting with a trochospiral growth pattern, but switching to a streptospiral pattern for its final chambers. It is globulose, and quite shiny, making it easy to recognize. It took me some time to locate a specimen for imaging, as most specimens have their aperture clogged with matrix. The aperture is low, but very broad, and the apertural surface of the chamber below it is strongly pustulose. If this image were rotated toward the viewer a bit it would be clear that a thin area just above the lip of the aperture (seen here as an imperforate band) also bears pustules, although they are not as strong as those beneath the aperture. For those interested in taxonomy, this species is the generotype of Pulleniatina. I am submitting this short blog entry to see if the recent problems with uploading to the forum have been fixed. If so, I'll be submitting other entries on this sample.
  16. Pollen Weighs in on a Climate Conundrum

    Shakum, J. D., 2018. Pollen weighs in on a climate conundrum Science News and Views, Paleoclimate, January 31, 2018 https://www.nature.com/articles/d41586-018-00943-4 "Simulations by climate models show that Earth warmed during the Holocene epoch, whereas ocean sedimentary cores suggest that global cooling occurred. An analysis of fossil pollen samples now sides with the models." Jeremiah Marsicek, Bryan N. Shuman, Patrick J. Bartlein, Sarah L. Shafer & Simon Brewer, 2018, Reconciling divergent trends and millennial variations in Holocene temperatures. Nature. 554, pages 92–96 doi:10.1038/nature25464 https://www.nature.com/articles/nature25464 Yours, Paul H.
  17. The stratigraphic nomenclature for Kansas has been formally revised. The result is lots of changes to the nomenclature made to acknowledge serious problems with five stage glacial model. Layzell, A.L., Sawin, R. S., Mandel, R. D., Ludvigson, G. A., Franseen, E. K., West, R. R., and Watney, W. L., 2017, Quaternary Stratigraphy and Stratigraphic Nomenclature Revisions in Kansas; in, Current Research in Earth Sciences: Kansas Geological Survey, Bulletin 263, 6 p. http://www.kgs.ku.edu/Current/2017/Layzell/index.html http://www.kgs.ku.edu/Current/2017/Layzell/Bulletin263.pdf http://www.kgs.ku.edu/Current/contents.html https://www.researchgate.net/profile/Greg_Ludvigson Yours, Paul H.
  18. Septarian nodule?

    I found the coolest rock I may have ever found today while out hunting for fossils. I hit the mother load on the fossils, but the rock is absolutely more fascinating at this point. More on the fossils later. I think the rock is a fragment of a septarian nodule that seems to be comprised almost entirely of what I believe may be aragonite and maybe a tiny bit of calcite. I found it in Post Oak Creek practically in the Sherman city limits. The formation in the creek is Alluvium which is Quaternary, Holocene, Cenozoic (in reverse order) I believe. It is surrounded by Austin chalk which is cretaceous. Can anyone help confirm the identity or tell me otherwise? Also, can anyone educate me about septarian nodules of this nature in the Alluvium or do you think It came out of the Austin Chalk? Any help our input is appreciated. Close up so you can see the crystle color and crystal form. Is it araganite? @ynot I know you’re a crystle/mineral guy. What do you think? Any idea how it formed? I saw a different kind of septarian nodule last week at Fossilmania in Glen Rose that came from the Main Street formation in Dallas county that were formed around ammonites. These look pretty different than those though.I’d call this the top down look. Side 1 of 5. It looks a bit like a thin separating ridge or wall/fin like structure that is also aragonite looking or a brown crystal. Side 2. There are some kind of clear yellow crystals mixed with the brown with a different shape to them. There’s even some amber looking color in there. Side 3 Side 4 Side 5
  19. Here are a few pictures of late-Pleistocene and Holocene macrofossils recovered from lake and wetland deposits in the southern Great Lakes Region (sorry, not all photos have scales for size). Hoping that @Doctor Mud will add a few from his investigations in New Zealand. Ceratophyllum demersum (hornwort) achene Myriophyllum exalbescens (milfoil) turion in silt Ephippium of a cladoceran (water flea) Achene of Potamogeton (pondweed) Picea (spruce) body fossil with Castor canadensis (beaver) gnawing (ichnofossil) and beetle borings (ichnofossil) Planorbella campanulata (snail) Perca flavescens (yellow perch) scale And just in time for Thanksgiving... Oxycoccos macrocarpon (cranberry) fruit
  20. Fossil coral reefs show sea level rose in bursts during last warming Reefs near Texas endured punctuated bursts of sea-level rise before drowning, Jade Boyd, Rice university, October 19, 2017 http://news.rice.edu/2017/10/19/fossil-coral-reefs-show-sea-level-rose-in-bursts-during-last-warming-2/ https://www.sciencedaily.com/releases/2017/10/171019100954.htm Pankaj Khanna, André W. Droxler, Jeffrey A. Nittrouer, John W. Tunnell Jr, Thomas C. Shirley. Coralgal reef morphology records punctuated sea-level rise during the last deglaciation. Nature Communications, 2017; 8 (1) DOI: 10.1038/s41467-017-00966-x https://www.nature.com/articles/s41467-017-00966-x Yours, Paul H.
  21. Holocene Plant Macrofossil

    I had talked to @Peat Burns about posting something a little different on TFF. Quaternary fossils from wetland deposits. Still fossils, but a bit different to what we mostly see on here. I want to get better images. We need to set up the camera on the dissecting scope, so here are some rough and ready shots taken down the eyepiece with my phone. Better images to come. These plant fragments tend to be tubular structures about 5 mm across. The Petri dish in the first shot is 5 cm across. Locality: Holocene wetland deposits, New Zealand. These are about 2000 years old based on radiocarbon dating. The last image shows some type of node I think, circular area about 3 mm across. Im guessing this could be tissue from some sort of rhizome network of a wetland plant. I'd like to know as it is very common in some layers of the sediment and I tried radiocarbon dating it. It produced dates that are about 1000 years older than the rare leaves and seeds I could find and I'm curious as to what it is. In this situation you can get things over 1000 years older than they should be as the plants are actually using old carbon. Some plants can use old dissolved inorganic carbon that can come from eroding limestone or groundwater. Thanks for looking!
  22. Fossils reveal how bizarre mammal beat extinction Society of Vertebrate Paleontology, August 24, 2017 https://www.sciencedaily.com/releases/2017/08/170824182708.htm https://phys.org/news/2017-08-fossils-reveal-bizarre-mammal-extinction.html https://phys.org/news/2017-08-caribbean-mammal-extinctions-spurs-renewed.html Yours, Paul H.
  23. NJ beach brachiopod?

    Years of collecting the strand line in Asbury Park, NJ, have revealed a lot of the rarer elements of the modern shallow marine fauna, as well as of the Cretaceous marine biota whose fossils wash up there. But this month I was astounded to come across this shell, which I believe to be a craniid brachiopod's dorsal valve. Based on its condition I can't be sure whether it's modern, subfossil, or even Cretaceous. It's matrix-free and shows signs of having been encrusted by cheilostome bryozoa. Can someone confirm or refute this ID? Can someone with expertise in the Cretaceous coastal plain comment on the likelihood of this specimen's possible Cretaceous origin? Thanks!
  24. Fossil Hunting Suggestions

    My father and I are planning on taking a trip fossil hunting this summer, we can't seem to find anywhere that really seems worth driving to. (Everything around us is basically Devonian.) We were looking for something different: Mosasaur, Arthropods (Cambrian preferred), Holocene, etc. My dad loves actual bones and I love arthropods from Cambrian. We came to a consensus and are looking for anything marine in the Mid-West. But we will take any suggestions into consideration! (We are new-ish to fossil hunting and are willing to go anywhere and do anything.
  25. Taphonomy, quantitative, cephalopoda

    category:awesome This might be extremely useful when read conjointly with the work of Sixto-Lopez. Nautilus rules!!! Why read this? Because of its rigorous and fairly exhaustive treatment of the data,and the great illustrations,of course