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Here is another Cabezon taxa that I am having a hard time identifying. Is it Pseudohypolophus? Rhombodus? Myladephus? Something else? Any help will be greatly appreciated! Randy
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- coniacian
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This is a well worn tooth from the Cabezon fauna. With the lingual and labial plications, I am assuming this is a Cretodus. The narrow cusp leads me towards C. semiplicatus. However, the accessory cusp is not as triangular as I would expect to see from this species. Am I right in my assumption concerning the species, or am I off base? Thanks!
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Hey everyone, I am trying to identify this tooth. My first guess would be an Ischyrhiza mira oral tooth, since I have a rostral tooth from the same site. But it also looks somewhat like the proposed Onchosaurus oral tooth as illustrated in Bourdon, et. al. (2011) page 39 tooth D. Or I could be completely off and it is some kind of orectolobid. What say you?
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Fossil found in Sierra County New Mexico in a wash located in the Monticello Canyon. Geological determination for this area is documented as Cretaceous - Mississippian. We have found horn coral and some type of sea sediment rock in the wash. Would like to have an opinion on this fossil embedded in rock.
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Does anyone have a good picture of an onchosaurus oral tooth? Thanks!
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A newfound quasicrystal formed in the first atomic bomb test ‘Trinitite’ contains a material that is ordered but doesn’t repeat itself By Emily Conover, Science News, May 17, 2021 https://www.sciencenews.org/article/new-quasi-crystal-formed-first-atomic-bomb-test The paper is: Bindi, L., Kolb, W., G. Eby, N., Asimow, P. D., Wallace, T. C., and Steinhardt, P. J., 2021, Accidental synthesis of a previously unknown quasicrystal in the first atomic bomb test Proceedings of the National Academy of Sciences Jun 2021, 118 (22) e2101350118; DOI: 10.1073/pnas.2101350118 More about Quasicyrstals ‘Time crystals’ created in two new types of materials These crystals repeat their patterns at regular time intervals, not distances By Emily Conover, Science News, May 4, 2018 https://www.sciencenews.org/article/time-crystals-created-two-new-types-materials Third kind of quasicrystal found in Russian meteorite Odd mineral first to be discovered in nature before being made in lab By Thomas Summer, Science News, December 8, 2016 https://www.sciencenews.org/article/third-kind-quasicrystal-found-russian-meteorite The quest for quasicrystals is a physics adventure tale ‘The Second Kind of Impossible’ reveals how scientists found the strange materials in nature By Lisa Grossman, Science News, February 19, 2019 https://www.sciencenews.org/article/quest-quasicrystals-physics-adventure-tale Yours, Paul H.
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- icosahedral quasicrystal
- new mexico
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There is a new centrosaurine ceratopsid from New Mexico described here: https://link.springer.com/article/10.1007/s12542-021-00555-w If anyone is unaware, the holotype of Menefeeceratops sealeyi was initially described by Williamson (1997), who refrained from from giving it a name because the holotype was incompletely prepared at the time of its initial description. With the description of new centrosaurines from southern Laramidia over the past decade, the exact relationships of Menefeeceratops to other centrosaurines have now been possible to decipher. Williamson, TE (1997). A new Late Cretaceous (early Campanian) vertebrate fauna from the Allison Member, Menefee Formation, San Juan Basin, New Mexico. In Lucas, SG; Estep, JW; Williamson, TE; Morgan, GS (eds.). New Mexico's Fossil Record 1. Albuquerque: New Mexico Museum of Natural History and Science Bulletin 11: 51–59.
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- centrosaurinae
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I got many bags of micromatrix to sift through over the Summer, one of them being from the Bull Canyon Formation, which is Late Triassic in age (~227-208.5 Ma). As has been said many times before, not much is known about the teeth that can be found here, unfortunately. The vast majority of fossils that I've found so far are fish scales, lots of fish scales. I've found a few teeth, serrated and non-serrated (mostly partial), a couple of tooth plates/jaw fragments, and random chunks of bone. The matrix is about medium grain size. For scale, the sorting dish I'm using has 1 cm squares. Most of the rock is a red color, and the fossils are almost entirely white. Here are couple of "in situ" shots: Jaw section (fish?): Tooth plate (also fish?): Serrated tooth fragment: Non-serrated, striated tooth fragment (amphibian?): A nearly complete serrated tooth!:
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The first is a strange tooth whose crown extends far into the root. As you can see on the photos, there is a bulge at the bottom of the crown, and that the root extends up the sides of the crown quite a ways. Any ideas?
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The final tooth of today is problematic in that it is a fragment. The main cusp seems to be complete, but that is all I can offer. Any help with this one? More to come tomorrow.
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The second tooth of today, at first glance, looks pycnodontid. But in the hundreds of pycnodont teeth I have found, I have never seen this type of ornamentation. And the root (as worn as it is) is definitely not that of a pycnodont. Any ideas?
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Day two of posts. I am posting four more fossils that I need help with. The first is a fragment. It looks like the tooth broke off right before the main cusp. There are two accessory cusps, the larger one looks like it has striations. This caused me to think of Cretodus semiplicatus. However, according to Welton, this shark only has one set of accessory cusps, never two. So any ideas?
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This is the other post that I was not able to find on the Forum (I'm sorry if I am just not finding it) This seems to be an odontaspid of some kind, but it is exceedingly small. Any ideas? I will be posting four more unknowns later today
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Hello all! I have finally finished sorting close to 300 pounds of anthill from north central New Mexico. I recovered (literally) close to 18,000 fossils! Most are identifiable, but there are a few that I can't put a name to. I am going to put up several for your expert analysis (not being facetious, you guys have an enormous amount of knowledge!) to see what you have to say. I will repeat this introduction for each grouping of photos, only changing the take number. Thank you all in advance! This fossil is somewhat like a cretolamnid, but is very small. An extreme cretolamnid lateral tooth?
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Hello all! I have finally finished sorting close to 300 pounds of anthill from north central New Mexico. I recovered (literally) close to 18,000 fossils! Most are identifiable, but there are a few that I can't put a name to. I am going to put up several for your expert analysis (not being facetious, you guys have an enormous amount of knowledge!) to see what you have to say. I will repeat this introduction for each grouping of photos, only changing the take number. Thank you all in advance! This fossil shows the internal structure that I normally see in Ptychodus. But when I flip it over, it is totally smooth. Any ideas?
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I am posting new photos of the original item in question in addition to photos of some of the other finds. I sincerely appreciate everyone's comments and interest in this subject and above all I thank you for your time and patience. I will not cover anything from the original thread simply for lack of time so I suggest you reference "bone fragment" if needed. So the following photos are of just a few of what has turned out to be something wonderful in my opinion. The items that I and a trusted friend have uncovered are either not much at all or something very awesome. Again this is only a small fraction of things still being found on the surface to no more than 3 inches below the surface.
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As mentioned in my opal post this was also in the mystery box and was looking for any ideas. About the size of a deck of cards.
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Found this one near Florida Mountains, more specifically Round Hound State Park, Deming New Mexico. I did some cutting and polishing on one end so it that it could be displayed more easily on my desk but have not really researched it so any help would be great.
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About a year ago I would purchase delinquent storage lockers and accumulated many cardboard boxes that I've yet to go through. This was found in one of those boxes just this weekend with many other beautiful rocks. Just hoping someone can help me out with it.
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Found this roadside while taking dogs for a walk. Its a long dirt road going north to south and ends at Hidden Valley Ranch, Luna County New Mexico. It is likely nothing but I found it worthy of asking.
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The attached paper describe six osteoderms, two vertebrae, and a partial tooth discovered in the Menefee Formation of New Mexico and representing one of the earliest occurrences of Deinosuchus on the Laramidian subcontinent. https://peerj.com/articles/11302/
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I found this a few years back near (but not in) Guadalupe Mts National Park. Is it a sponge, coral, algae, or something else? Piece is about 6 inches across. Thank you for your help.
