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Labocania aguillonae - Teratophonein tyrannosaurid from Mexico
Kikokuryu posted a topic in Fossil News
"A New Tyrant Dinosaur from the Late Campanian of Mexico Reveals a Tribe of Southern Tyrannosaurs" https://www.mdpi.com/2813-6284/2/4/12 Rivera-Sylva, H.E.; Longrich, N.R. A New Tyrant Dinosaur from the Late Campanian of Mexico Reveals a Tribe of Southern Tyrannosaurs. Foss. Stud. 2024, 2, 245-272. https://doi.org/10.3390/fossils2040012- 8 replies
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- aguja formation
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Hi everyone! I wanted to ask you for help in recognizing if this fossilized fish could be real or fake. The description does not provide much datas, it does not specify what species it is, as a place of discovery it says a generic United States and that it is dated back to the Paleozoic. The fish measures 10 cm. Doesn't it seem too well preserved? Are there fake fossilized fish? And if so, how to recognize them (apart from visible brushstrokes to reconstruct the missing parts)?
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What Kind Of Stream/Brook Is Best For Pleistocene Fossils?
CrankyPongine posted a topic in Questions & Answers
Hey all. Just was curious about something. I’ve heard of mastodon teeth and other things being found on occasion in streams and brooks (such as the mastodon tooth found in Michigan by that one boy) and was curious what type of brook/stream it has to be to have things like that in them? I’m mainly referring to northeastern streams and brooks, and what the conditions have to be to preserve things like teeth of mastodons and/or mammoths, etc. Just a rocky stream/brook? And does it have to be in a glacial deposit? Thanks! -
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- Found in North Carolina
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Discovered along the coast of Cape Cod, Massachusetts, United States. I am told this is a whale vertebrae, but am interested in knowing any additional detail that can be provided - species, likely size of the whale, is it fossilized, rare etc? Measures approx 10” by 10”. Thanks in advance for any assistance!
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Hey everybody! I'm Korey and I'm a bit new here (and to the world of paleontology in general) so I apologize if things might be a little messy. Regardless, I'll try my best in keeping things as crisp as possible. I was hoping I could have some help identifying a few fossils on the exterior of these rocks I found. The following three fossil matrices were collected in a single trip along Cape Fear River in the Wilmington area. Each one contains numerous fossils of a variety of species embedded within a limestone matrix. Mineral composition was confirmed by a professor of paleontology (specialized in microfossils) at UNC Wilmington, meaning they likely originated from the Castle Hayne limestone deposit. I would really appreciate some help in identifying some of the fossils found in these matrices, as while a decent number are somewhat recognizable, there are some that are completely mysterious. Specifically in matrix B and C. Matrix A: Measuring roughly 61mm in length, and 40mm in width, this is a cluster of what appears to be remnants of steinkerns and their remaining impressions. I counted over 10 individual snail shells, the exact number being a bit unclear, and a single bivalve impression. The snails appear to be some form of teribridae, while the nature of the bivalve impression is unknown. The largest snail impression measured at roughly 14mm in width. Length was unfortunately not easily measured as there are seemingly no complete impressions left behind. Much of them simply stretch across the entire matrix. The bivalve impression takes up much of it's side of the matrix, measuring at a rough 38mm. Matrix B: Measures roughly 52mm in length, and 43mm in width. This matrix is host to an intact unidentified bivalve shell, what appears to be a pair of concretions, encrusting bryozoa, and an unidentified organism. The bivalve shell is roughly 25mm wide. A bryozoan colony is visible to the left of the shell's beak. You can also see the concretions top right of the shell. What species of bivalve is it? Each concretion is roughly 5mm in width. The edges of the concretions appear to be encrusted by bryozoa. (It is very hard to get good pictures of this feature, I'm sorry). The final feature of Matrix B is this unusual shape closely resembling a reverse impression of a coral cup. Measures 17mm at it's widest and 10mm at the thinnest. Seems to consist of a central undefined and weathered shape surrounded by a series of 10 striated symmetrical structures resembling the septa of a coral polyp cup. There is no other apparent evidence of similar structures within the matrix, and it seems to be entirely on it's own. Matrix C: Measuring 174mm long, and 97mm wide, this chunk of limestone has some heft to it. Contained within is the fossil of highest interest to me, what I originally thought to be petrified wood. Also present is what appears to be a eutrephoceras shell, and a single unusual ring-shaped organic artifact. This particular matrix was discovered under the water, where only a small part of it was sticking out of the submerged mud. Jutting out of the matrix is a partly exposed branch-like structure of unknown biology. This picture depicts the anterior end of it where it appears to have been broken off, revealing the interior cross section of the branch. This structure is roughly 25mm at it's widest I had originally thought it to be petrified wood, but the paleontologist I consulted disagreed, stating that petrified wood typically looks different. It is most certainly not coral either, so perhaps it is a species of branching bryozoan? Here is a side view of the branch structure, showing the deep striated appearance of it's exterior. At this point it looks almost more geological than biological, but the interior shapes tell a different story. I honestly suspect that it may have been eroded. A scant 19mm of this structure is exposed from the surrounding substrate, which I suspect might be hiding a much longer specimen. Here is another branch that appears similar to the prior one, only much smaller. Measuring a mere 5mm in width at it's widest point. Unlike the larger branch, the entire 25mm of this structure has been left exposed, revealing a very similar striated exterior. Could both of these have belonged to the same organism? This little limpet-like organism was hiding in a tiny recess, merely 4mm at it's widest. Not sure what it is, really. I appear to have forgotten to measure this one while I had my fossils out so I apologize, but this appears to be some form of coral-like structure. If you look closely you can just barely make out what appears to be a defined exterior ring nigh indistinguishable from the surrounding limestone. And finally we have what appears to be Eutrephoceras or at least some other similar mollusc. It's fairly small and measures around 18mm wide from the lip to the anterior of the whorl. Only three chambers can be seen, though there might be one or two more. I'm excited to see what everyone thinks of these fossils, and what they think they might be. It's a mystery that's been nagging at my mind for weeks now, and I have unfortunately yet to find answers. Please let me know if any more angles or pictures are needed, and I will try my best to provide.
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I'm interested in petrified wood for the scientific value (wood where the cell structure is well preserved), for the aesthetic value (mineralized with vivid colors and crystal shapes), and for oddities (like fungus, insect borings etc.) contained in the wood. Below are three petrified wood slabs, from the United States, from my collection. The below individual slab pictures were taken with the slabs dry, indoors using my camera with flash. The close-up pictures were taken with my Dino-Lite digital microscope. If you want to see a lot more of the petrified wood pieces in my collection, check out my TFF thread at the below link: Petrified Wood, conifer, fungus Polyporites wardii, early Permian late Triassic 295 to 201 MYA, Chinle Formation, northern Arizona - 3.60 lbs. 10.5x8.75x0.53 inches Traditionally this petrified wood has been identified as Araucarioxylon arizonicum, a conifer tree. However,according to Wikipedia “ The validity of the name Araucarioxylon arizonicum has been questioned. A. arizonicum may actually be composed of several different genera and species. A 2007 study on the syntypes used by Knowlton in describing the species has revealed that they belonged to three species. They were tentatively reclassified as Pullisilvaxylon arizonicum, Pullisilvaxylon daughertii, and Chinleoxylon knowltonii. The genus Araucarioxylon may thus be superfluous and illegitimate; and the petrified logs of Petrified Forest National Park may be composed of a greater diversity than initially believed.” What makes this slab unique are the oval shaped patterns framing and permeating the piece, which are actually the fossil remains of a fungus (named Polyporites wardii), that invaded the ancient tree before it was fossilized. The fungus is preserved in barite (fungus is almost never seen because it doesn't preserve in silica the way wood does). Petrified Wood, Triassic 225 MYA, Chinle Formation near Holbrook, Arizona - 745g 160 x200x12mm This slab has incredible colors (purple, red, orange, yellow etc.) which is a major reason why Arizona petrified wood is highly desired by petrified wood collectors. Petrified Wood, early Eocene 50 MYA, Green River Formation, Blue Forest along ancient Lake Gosiute, Sweetwater County, Wyoming - 1.2 lbs. 8.5x6x.38 inches This slab has really nice wood preservation with a very well defined heart in the center and stunning wood grain. There is blue agate, with golden calcite filling some of the agate voids, some nice insect borings, as well as fossil ostracods near the rind. Per Viney 2020 The Blue Forest of Ancient Lake Gosiute Sweetwater County Wyoming “The lacustrine setting in which the silicified wood formed is contrasted with two geologic environments commonly associated with silicified wood deposits, trees transported by streams and rivers buried in fine-grained fluvial sediments of deltas and floodplains as well as lahars and ash produced from volcanic eruptions that bury trees. A recent scientific study of the Blue Forest fossil wood reveals that preservation occurred as a multistage mineralization process. The taphonomic sequence that included stromatolitic growth followed by wood desiccation and then exposure to mineral-laden waters is consistent with a playa-lake model for Lake Gosiute.” Marco Sr.
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Hi all, I just got back from my first Big Brook journey and found many amazing things. I've figured out the majority of my finds but i am left with a few below that i could use some help on. I've attached pictures with measurements. Please let me know your thoughts! Once I've IDd these, i will make a post of my findings in the sites forum. If some of these chunks are too small to identify, i completely understand. Location: Big Brook Preserve, New Jersey. Found in creek from various methods of sifting and surface scanning. Period: Cretaceous, 70-72 million years old 1. I believe this is my first shark vert but would like confirmation. 2. These types of rocks were plaguing my new paleontologist brain all day. Can someone confirm what type of rock this is? This is NOT a fossil correct? My gut and from what I've seen is telling me ironstone concretions (The bane of New Jersey)? Two examples here: 3. Absolutely no clue, don't believe it is a rock though. 4. Bone? Is this enough to ID? 4. I thought these were plastic chunks at first. The brown one is definitely not though. The black cone has two perfectly symmetrical lines going up either side, seems odd. Doesn't sound like plastic when tapped though. Thank you in advance and please forgive my ignorance, very much a rookie at identifying anything other then teeth!
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- big brook
- cretaceous
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Hi all, I found this in far northern Minnesota near a river. The circle is on both sides of the 2" thick rock, so I am assuming that a cylinder extends through it. After looking at images online, I am thinking that it might be a fossilized tubeworm, but none of the photos that I've seen quite match. Northern Minnesota has obviously had a lot of glacial activity in the past (possibly Blackduck Formation in the location found), and this area has Neoarchean bedrock. Thank you for any information that you can provide!
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I’ve posted to this forum once or twice before and have been using it as a valuable resource in dealing with my collection, and foresee my self repeating such action I’m the future, so I may as well introduce myself! I’m a 21 year old fossil enthusiast with a growing collection located in Louisiana. Fossil hunting is pretty slim where I currently live and all of my self finds are from Devonian-Mississippian age gravels used for landscaping (lots and lots of crinoid impressions!), though I dabble a lot in buying from online distributors (with some in-person buys when traveling) and have built up an international collection I am very proud of! I look forward to posting more, thank you for having me
- 10 replies
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- louisiana
- louisiana gravel fossils
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- hell creek
- hell creek fm
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- beach
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Can radioactive fossils damage other specimens?
Maniraptora posted a topic in General Fossil Discussion
I know next to nothing about radioactivity-- enough to know licking fossils is inadvisable, although I'll admit that wasn't terribly disappointing news. What I'm wondering is whether specimens not radioactive enough to endanger a person are capable of damaging other specimens. Is there a need to segregate displays here, or am I just confused about the mechanics of this? My specific reason for asking is that at the moment I'm planning for my current favorite mineral specimen (which I am babying forever), an almandine garnet from Broken Hill, New South Wales, Australia, to share a small shelf area with a tooth from the phosphate deposits in Oulad Abdoun Basin, Morocco and a few dinosaur bone pieces from the Hell Creek Formation of Montana (one from Dawson County) and Lance Creek Formation of Niobrara County, Wyoming. The shelf is not enclosed, by the way. Thanks for your help! -
Best Public Sites in the U.S. for Ammonites?
Megalodoodle posted a topic in General Fossil Discussion
Does anyone know of the best public areas to collect ammonites in the U.S.? Ie., places like Lake Texoma where they allow you to collect ammonites on public land. I don’t really want to vacation in Texas this year and am looking for alternative places to collect at. Essentially looking for public locations anywhere except Texas. Thank you all in advance!- 13 replies
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- ammanoidea
- ammonite
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Hello my name is Shannon Miller I'm from West Virginia up around the Logan area currently live and the things that I have found I've come from such places as well. I'm new to the site so I ask you too forgive me if and any of the froms filled out, if i get anything wrong by all means please feel free to correct me. For I do want to know how to do this all in the right way. I've got a few things I'd like to find out about that is not your ordinary everyday and find and I sure do appreciate every little bit of help that I can obtain I look forward to learning a lot with you guys and hopefully teaching something as well. thanks in advance have a great day!
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- chapmanville west virginia
- logan
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I found this about a year ago in a farmers field in central/mid Michigan, US. It is rather light. Not much weight to it. Thanks for any help!
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Hello everyone, I’m Noah and I’m from Florida. I’ve loved dinosaurs and fossils for the longest time but I’ve never been able to go digging because I live in a decently urban area in central Florida. Hopefully I can go digging sometime and enjoy my existence on this forum!
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States (in the U.S.) Where Trilobites Have and have not been Found
Top Trilo posted a topic in General Fossil Discussion
I did lots of online searching on which states trilobites have and haven't been found in, and compiled this. Its not as straight forward as you might think. Green means trilobites have been found in that state on the surface and are native to that area. Yellow means technically a trilobite has been found there but was found below the surface or the rocks are not native to the state. Red means no trilobite has ever been found in the state except for when humans have transported them there. Green: Alaska, Alabama, Alaska, Arizona, Arkansas, California, Colorado, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming Yellow: Florida, Louisiana, North Dakota Red: Connecticut, Delaware, Hawaii. No trilobites have been found in these states. The only trilobites in Florida and North Dakota came from cores that came from very far below the surface. Louisiana has trilobites from gravel that were transported via rivers from the Tennessee region. I have found very little references on trilobites coming from Oregon and Mississippi but have heard they exist. As far as Washington DC goes, I haven't seen anything that has said a trilobite has been found there but there are Paleozoic rocks at the surface according to macrostrat and trilobites have been found not too far away so I left it grey. Does anyone see anything incorrect with the above information? Before I undertook this task I knew trilobites were widespread but not this widespread. Trilobites are everywhere. I thought I'd share with the group.- 28 replies
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Could I get some help identifying this fossil specimen? I'm unsure of if it's a rock or bone but considering the contrast of texture and look with any rocks I've found before, I'm leaning towards bone. It was found near a river in middle-Arkansas & is pretty small and hard to discern. Any ideas?
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I found a small complete Eldredgeops rana trilobite at Penn Dixie's "Dig With the Experts" last weekend. It's the first trilobite I've found, and I don't want to ruin it by trying to prep it myself. Does anyone know someone in the US who does that sort of thing? Or know how I could find someone? And is $30/hr. a realistic amount to expect to pay? Thanks for any help! --Kathy
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How do you go about asking for private land permission?
Ordivician19 posted a topic in Questions & Answers
This is probably a dumb question, but it’s something I’ve been hesitant about. I was wondering if someone could give me tips about whom to ask (I assume businesses more often than individuals), how to ask in a way that is fair to both parties, and just any common courtesies that I should provide so that I’m less likely to be perceived as insincere. Thank you!- 1 reply
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Two in one post: possible Allosaurus tooth and Marshosaurus tooth
AJ the Tyrant posted a topic in Fossil ID
I’m wondering if these two teeth (both are from the Morrison Formation in Moffat County, Colorado) have been identified correctly as Allosaurus and Marshosaurus. Here are the measurements of both: Allosaurus: 4cm long serration count is 10/5mm on anterior and posterior carinae base length is 21mm and base width is 13.5 mm (note from dealer: Please note that the base of this tooth is broken and the transition of enamel to root is not present. The base measurement may have been larger.) Marshosaurus: 4cm long serration count is 18/5mm on anterior and posterior carinae base length is 15 mm and base width is 8mm (note from dealer: Please note that the base of this tooth is very near the enamel to root transition a represents a fairly complete tooth.) The serrations on the anterior keel of the tooth extend two-thirds of the distance from tip to base. Images seem to be weirdly mismatched, but I think it’s pretty easy to tell which pictures match with which.- 3 replies
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- allosaurus
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Hello all, looking for a little help with the identification on a few items my kids and I have picked up at our ranch in the Texas Hill Country, located in Kimble County. We have just started down our adventure fossil hunting and to this forum. Please be patient with me. Thank you all for the help and I’m looking forward to learning and growing with this community. Jason
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- hill country texas
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Places in Texas to look for Acrocanthosaurus material.
AJ the Tyrant posted a topic in Fossil Hunting Trips
I know that Acro stuff is quite rare and hard to come by, but I was wondering what the best spots in Texas are to find such fossil material. I live in the state, so it would not be too much of an issue to travel to a spot or two to hunt for these theropod fossils. To sum it up, my question is: what are the best spots in Texas to legally hunt for and collect Acrocanthosaurus fossils/teeth (preferably without heavy duty tools or machinery)? If there are any, it would be much appreciated if you list the formation and location.- 16 replies
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- acrocanthosaurus
- carcharodontosaurid
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