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Showing most informative content since 01/23/2018 in all areas

  1. 19 likes
    Not all rocks that look like poop have a fecal origin. Here are a few things to consider when trying to determine whether or not you have a coprolite: 1. Location, Location, Location – If you haven’t guessed, the first and most important thing to consider is the location your rock was found. Don’t expect to find a coprolite unless you find it in geologic area/layer where other fossils are found. If you find things like bones, teeth and fish scales, or prehistoric tracks, you may just be in in luck. 2. Shape – While fecal matter can be rather free-form when exposed to the elements or when digestion issues arise, most coprolites are shaped like poo. As with modern extrusions, fossilized feces can be shaped like pellets, spirals, scrolls, logs, piles, etc. Their shape is dependent on shape of their producers intestinal and anal structure. Look for things like compaction folds and pinch marks. 3. Texture - Most coprolites are fine grained. If your specimen appears granular under magnification, it is most likely not a coprolite. There are some exceptions, such as marine creatures that feed on bottom sediments or coral. That is why knowing the location and geology of the area where it was discovered is so important. 4. Inclusions – Many times, coprolites will have visible inclusions. Things like fish scales, bone fragments, and teeth may not get fully digested, and can be visible on the surface. Some animals ingest stones for ballast or digestive purposes. These are known as gastroliths, and if present, are generally smooth. 5. Composition – Because herbivore scat tends to break a part and decompose rapidly, it rarely survives the fossilization process. So most fossil poo that is found is from carnivores. The reason for this is that their poo is usually high in calcium phosphate, the same mineral found in bone. This mineral can appear in many forms. It can be hard and dense or soft and porous. If the potential coprolite appears soft and porous, there is a quick test that is often used in the field. If you touch to stone to the tip of your tongue and it sticks, chances are, it is high in calcium phosphate and could be a coprolite. If you are not that brave, you can also touch it with wet fingers to see if it feels sticky, but this is not nearly as fun. If the calcium phosphate takes a harder, more dense form, the “lick test” won’t work. In some instances, chemical analysis is required to definitively identify the mineral composition.
  2. 15 likes
    The past few weeks at the Tucson Fossil I ran across a few fake Spinosaur claws but also was surprised how many good ones there were on the market. I also understand the issues with online claws so decided to put this topic out to help collectors gain a better understanding of them since they are very expensive. These are my opinions and welcome others since no one person as all the answers. There is no bullet proof approach you can take to insure you have a claw that is not totally fake or composited. There are some things you need to consider. - First try dealing with what I call preferred Moroccan merchants, those are typically found at big shows and a few have online or FB sites, ones that specialize in Moroccan material are the best. They typically know what to look for and can point out issues with claws. Makes life a bit harder to get one but you want a good claw don't you. This does not take you off the hook its still YOUR responsibility to know what you are buying. - Unless you are an expert never buy one from Auction site. If you see one that interest you see seek assistant from an expert, not a collector friend, or post it here on the forum we have lots of opinions here. - 2D photos are not always the best to see what is going on with a claw, I prefer handling one. Composited claws can be good and photos don't show you all the issues. - Good preservation and quality are key for making life easy in deciding if its a good claw or not. There is where it pays to focus on the better claws. Claws that are deformed, partial, compressed, beat up or have matrix on them are very difficult to insure you have a good one and especially hard for experts to positively say its good. It always best to save and wait to buy a higher end one. - As a general rule try avoid claws that have matrix glued on them or have seams with matrix. The matrix is there for only one reason to hid trouble. Matrix is a red flag, just tread carefully when looking at one of these. Ask yourself why risk it and buy a potentially problem claw, there are plenty out there that are clean. PRICE = Preservation (Quality) + Size - Repairs - Real claws are expensive, simple as that. Nice ones in the 6+ inch range can easily fetch over 1K depending on quality, 7+ inches can go over 10K . So if you see big claws under 1K there must be a reason unless its the deal of a century and they exist. Most of the claws I show are in the 1-2K range for 4-6 inches. Here are a few from the Tucson show to give you an understanding what real ones look like. Focus on shape, the articulation end, blood grooves and preservation. These two are clean no matrix, no compression may have been broken and reattached, reasonable preservation. Nice claws for any collection Higher Grade - Fatter, nice surface finish, good preservation, few if any repairs. Couple of more examples. Honest merchant shows, some repair and resto. Excellent high end claw around 7 inches very very expensive Fake Claws These two were laying in the box and the merchant said he just had them fabricated. They look pretty good to a novice both reasonable size and configuration. Probably copied from a good one. Red Flags : Check out the graining its does not follow the curve of the claw but is straight. Uniform Color and looks too clean. Finish is flat with no hit of sheen seen on bone. Super long ones are the most suspect, here are two in a box. Unusually long and thin, usually the dorsal curvature is not smooth to the tip has kinks, the preservation is odd, hard to see bone, lots of surface repairs. These may be composited, faked or combo? Who knows to risky to find out. Off an auction site - terrible fake easier to spot- 6.9 inch claw One of the hardest items to replicate is the blood groove that is on either side of the claw. The groove is the widest at the articulation end and slowly tapers to a point to form a channel at the tip that extends outward beyond the dorsal surface. Here is an example of a perfectly preserved one. Here is the tip of the claw from above and you can see the blood groove is just a channel in the claw. Another Characteristic on these claws is that when looked at from the top or bottom they are shaped like an isosceles triangle. Much bigger at the articulation end than the tip. Preservation may affect this but most should be tapered. Like most theropods, hand claws vary depending on digit so there will be variations depending on that and the number of different Spinosaurids that exist in Kem Kem. This is a big unknown and we believe these type of claws all belong to the Spinosaurid family. But here are a couple more you can check out the blood grooves, articulation and shape
  3. 11 likes
    I saw this on a number of different posts by the Tyrrell and thought it would interest our members. Clips and photos courtesy of RTMP. The Royal Tyrrell Museum collection includes one of the best-preserved Daspletosaurus theropod skulls. The skull is unique in that it is a disarticulated skull, where all the bones were found separately and were not crushed flat during fossilization. Daspletosaurus was a large tyrannosaur that lived 77.3 – 75 million years ago in Alberta and is closely related to Tyrannosaurus rex. The left maxilla (upper jaw). Note the teeth at various stages of growth. Dinosaurs continually replaced their teeth throughout their lives why the different sizes in the jaw The skull bones of the Daspletosaurus torosus were first discovered in 2000 near the Milk River in southern Alberta, and it took until 2011 for all the pieces to be collected. Since the individual pieces of the skull were separated, it was not obvious where each bone was located in the quarry. Researchers waited until further pieces of the skull eroded out of the ground, rather than searching for them. The left pre-maxilla (front of the upper jaw) in the field. Left pre-maxilla (front of the upper jaw) prepared. As fossil bones are extremely fragile and often heavy, they can be difficult to manipulate and handle. That makes it difficult for researchers to study certain specimens, or for them to be displayed. Although they have the majority of the skull of Daspletosaurus torosus in our collection, it is too fragile to piece back together. As a solution, they decided to create a cast and display it as an exploded skull. Exploded skulls are a common tool used to teach anatomy, allowing for examination of the individual pieces of a skull. This will allow researchers to examine all the bones that make up a theropod skull from multiple angles. Since certain pieces of this skull of Daspletosaurus torosus are too delicate to be cast using traditional methods, they created a digital model of the skull using photogrammetry. By taking multiple photos of each piece, their technicians were able to create digital models of the skull that were then 3D printed. This project is the first time the Museum has 3D printed a cast of a specimen and it was very successful. To show all 41 bones of the skull of Daspletosaurus torosus, they mounted the cast as an exploding skull. They suspended the specimen in the air to determine the position of the pieces. Once the positions were finalized, a mount was constructed to hold the specimen A mount is then created. Daspletosaurus torosus is now on display! This display was one of their most difficult and technical projects yet, using new technologies and artistic techniques to create the cast and mount. As far as they know, it is the only exploded dinosaur skull in the world Photo of player Found that the player moves quite fast. Move the forward > with your finger for better results DWLAqm2XcAEohbq.mp4
  4. 11 likes
    A few items I recently picked up at the Tucson show. Others will follow Nice size Pterosaur upper beak. Big Dorsal from a Sauropod - needs to be prepped to remove matrix glued on the bone. Will tackle after the show. Very Arthritic bone.. believe its Phalanx 2 but fits well with the above carpal. A Theropod indet but similar to a Spino on the most recent paper. Who really knows at this point with how little we have to go with and just sketches
  5. 11 likes
    A few Kem Kem items that I picked up for my collection A Spinosaurid and Sauropod tooth with interesting pathology An unknown Theropod possible hand claw A very large partial upper beak from a pterosaur possibly Alanqa Possible wing bone from Pterosaur Big carpal from a Spinosaurid Toe bone from a indeterminate theropod Partially rooted tooth theropod.
  6. 10 likes
    Troodontids certainly are one of my favorite dinosaur families. Intelligent and what a set of chompers to eat you with, all you can ask for in a cool dinosaur. Will start this with the Pectinodon teeth in my collection and will continue to add as I take photos. This species has some of the coolest teeth. Pectinodon bakkeri is the only named Troodontid in the Hell Creek and Lance Formations. This is a tooth taxon and its teeth are significantly much smaller than its big cousin Stenonychosaurus. Lance Formation Hell Creek Formation A couple of the teeth in matrix are partially rooted which is extremely rare since the teeth are so small Hell Creek Formation - Powder River County Hell Creek Formation
  7. 10 likes
    Duetina vietnamina is not a valid species - the correct species name is Ductina vietnamica. The complete taxonomy is listed below: Class Trilobita Order Phacopida Suborder Phacopina Superfamily Phacopoidea Family Phacopidae Genus Ductina Species D. vietnamica
  8. 10 likes
    Morph Type 9 (Spinosaurid indet.) Vertical ridges on both sides of the crown (one side strongly developed, weak on other) Carinae present around midline of the tooth Morph Type 9A (Spinosaurid indet.) Vertical ridges on only one side of the crown Carinae present around midline of the tooth Morph Type 9B (Spinosaurid indet.) Vertical ridges absent on both sides of the crown Carinae present around midline of the tooth Morph Type 10 (Carcharodontosaurid indet.) Anterior tooth Distal margin is slightly concave Mesial margin recurved Mesial Carina extends to the base Denticles are oriented toward the tip Interdental sulci present (Blood Roots) Serration Density: Distal: 2/mm (More dense toward the base) Mesial: 1.6/mm (More dense toward the base) Morph Type 10A (Carcharodontosaurid indet.) Anterior lateral tooth Distal margin is slightly recurved Mesial margin recurved Mesial Carina extends to the base Interdental sulci present (Blood Roots) Serration Density: Distal: 2/mm (More dense toward the base) Mesial: 1.6/mm (More dense toward the base) Morph Type 10B (Carcharodontosaurid indet.) Distal lateral tooth Distal margin is fairly straight Mesial margin recurved Mesial Carina extends to the base Interdental sulci present (Blood Roots) Serration Density: Distal: 1.8/mm (More dense toward the base) Mesial: 1.5/mm (More dense toward the base) Additional Example of a Infant Tooth Crown Height: 12 mm Serration Density Distal: 3.6 mm Mesial: 3.5 mm
  9. 10 likes
    I was splitting up some Conasauga Formation shale from the Chatsworth area exposure @Nimravis and @MeargleSchmearglhave been posting about recently. This was material I brought back 2 or 3 years ago and have had sitting around. I found numerous specimens of the usual Aphelaspis the site is noted for. Then I split a small piece and here's what popped out: Four complete Agnostus inexpectans agnostid trilobites!! Talk about "inexpected", it's hard to find one of these complete much less four on the same piece of shale. Some other views: Don
  10. 10 likes
    Hi all, I just wanted to let everyone interested in eastern North American dinosaurs know that my paper reviewing and analyzing Appalachian dinosaur faunas was published as Brownstein (2018). The full citation and doi are below. Brownstein, CD. 2018. The biogeography and ecology of the Cretaceous non-avian dinosaurs of Appalachia. Palaeontologia Electronica 21.1.5A: 1-56. All the best, Chase
  11. 10 likes
    Gone are the days when high quality dino eggs were freely sold at public auctions. I recently borrowed some catelogues from Bonhams, IM Chait and Heritage Auction that were 10-20 years old and was amazed by what was once available for sale! Here are a few eggsamples of pictures I took from the catelogues. Therizinosar Eggs with embryo exposed. Two examples of oviraptor nests with the remains of their mother guarding her young from whatever disaster took all of their lives. A spectacular nest labeled Troodon formosus. A saltasaurus egg, one of the most prized dino eggs to collectors. Large section of an oviraptor nest. A nice example of a hadrosaur nest.
  12. 9 likes
    Back in 2001, I became a member of my local Rock Club, The Syracuse Gem & Mineral Society. From 2001-2010 I was very active in the club. I went to almost every meeting, I organized some field trips, served as Treasurer, gave talks, basically helping out anyway I could. Then in 2010 I had a lot going on in my life and slowly I was less and less involved and it got to the point where I wasn't involved at all. I have been wanted to get back into it. Last night I decided to go to the monthly meeting. It was really nice to see old friends and everyone asking me how I've been and what have I been up to. Before long it hit me that I have been missing out. I had some really good times with these people. I have learned a lot from them. Last night I had made them a promise that I was coming back for good and that I wanted to be a participating member the way I used to be. The reason I have brought this topic up, is because I want to encourage members of this forum who are not already members of their local club, to do so. There is so much to gain by joining. Most members of such clubs are truly a wealth of knowledge. You might learn about collecting sites near you that you won't find out any other way. Clubs usually can get access to places a regular person can't. Plus you could end up making some really good friends. The list goes on and on. There is everything to gain and nothing to lose. Just some food for thought.
  13. 9 likes
    Isolated theropod Teeth from the Kem Kem Basin continue to be a mystery. Plan on documenting all the different morphologies I have in my collection. Can provide discussion and aid in identification at some point. Just a note, different morphologies do not necessarily mean different species. There is lots of tooth variations in the dentition of a theropod, why its so difficult to nail down an ID even in the best of circumstances. Morph Type 1 Anterior Tooth Distal margin is almost straight Mesial margin strongly recurved Mesial carina extends 3/4 crown height Denticles are oriented towards the tip Serration Density: Distal - 2/mm (More dense toward the base) Mesial - 1.7/mm (More dense toward the base) Morph Type 2 (possible Carcharodontosaurid) Anterior Tooth Distal margin is slightly concave Mesial margin strongly recurved Mesial Carina extends to the cervex Denticles are oriented toward the tip Interdental sulci present Serration Density: Distal: 2/mm (More dense toward the base) Mesial: 1.9/mm (More dense toward the base) Morph Type 3 Maxillary? Mesial carina extends 3/4 crown height Denticles parallel to the base and rounded at tip Serration Density: Distal: 2.2/mm (More dense toward the base) Mesial: 2.4/mm (More dense toward the base) Additional Example Morph Type 4 (Possible Dromaeosaurid like) Lateral Tooth Tooth is recurved Mesial Carina extends to 3/4 crown height with a lingual twist Denticles parallel to the base Serration Density: Distal: 3.6/mm Mesial: 4.6/mm Additional Example Serration Density: Distal 3/mm, Mesial 5/mm Morph Type 4A (Dromaeosaurid like) Tooth is slightly recurved Mesial Carina extends to base with a lingual twist Denticles parallel to the base Serration Density: Distal: 3.6/mm Mesial: No Serrations Additonal Example Serration Density: Distal 3.3/mm, Mesial: No Serrations
  14. 9 likes
    This is an excellent paper, although it also misspells the species as Ductina 'vietnamila' No wonder it is difficult to find info on Ductina vietnamica. Check your PM - file sent! Han, N., & Chen G.Y. (2007) Moulting variability in the Middle Devonian trilobite Ductina from Nandan, Guangxi, China. Acta Palaeontologica Sinica, 46(2):167-182
  15. 9 likes
    Detail of the show logistics can be found in the following topic Dealers are slowly getting into town and its a madhouse looking at the dealers setting up. The show officially starts Thursday but some are already open in the Ramada and Tucson Hotel that I visited today. Here are some pictures. Tucson Hotel City Center -
  16. 9 likes
    Morph Type 5 (Dromaeosaurid like ?) Lateral Tooth Tooth is strongly recurved, compressed Mesial Carina extends to 1/2 crown height, centrally located Serration Density: Distal: 4/mm Mesial: 5/mm Morph Type 5 (May not be Dinosaurian) Distal margin very straight Mesial margin slightly recurved Denticles are very small but rectangular under a microscope Serration Density: Distal: 5/mm Mesial: 5/mm Additional Example Morph Type 6 Lateral tooth Tooth slightly recurved Transverse undulations present Mesial carina extends to the cervix Denticles are very fine, Serration Density: Distal: 2.8/mm (More dense toward the base) Mesial: 2.6/mm (More dense toward the base) Additional Example
  17. 9 likes
    Thank you all for the kind comments. I'll be posting more photos of different fossils soon. @TqB @minnbuckeye @Kane @Heteromorph - here's a quick guide to how I did it. I'll go into some detail, so much of this you'll already know, but I thought perhaps it could be useful to others in future if I went fairly in-depth, so please don't feel patronised. I feel a bit like I'm revealing some tricks of the trade, but sod it, I learned many of my skills from others! This photo gives a basic overview of the makeshift 'studio', but it's so cramped it's hard to make out what's what. Note that I use a few pieces of expensive equipment, but none of it is absolutely necessary to do most of these types of photos, so I'll cover that as I go through. The camera is a Nikon D800, but any digital SLR would do the job. I've got that on a bog standard tripod. Lighting wise, I have a Godox AD360 on the left, which is firing into a circular reflector, to provide a more diffuse light. If you've not seen an AD360 before, it's basically like a standard flash, only bigger, much more powerful and with a huge battery pack which allows you to cycle thousands of times without recharging, and with a very quick recharge time. It's popular with wedding photographers. But a smaller flash would also work; I'd just have to leave longer recharge times between each shot, and have piles of rechargeable batteries on hand! The flash on the right is a super-cheapo Neewer TT520. These can be picked up for about £30/$42. They have built in optical slave mode (so they can automatically fire when the other flash goes off), and you can use a £10 cable to connect them to a Godox AD360 battery (although you must have rechargeable batteries in it at the time). I've used a £15 fabric 'snoot' with the flash, which directs the light into a focused beam. I can then use as a back-light, or as a backup to the Godox. For some shots, I use a third flash. The individual gastropod was photographed with a flash behind it on the table, to the left. Both main flashes are mounted onto normal lighting stands with an adapter. I'd probably mount them onto tripods instead, for increased flexibility, if I had the space. For general close-up work, I use an good quality prime lens mounted onto extension tubes. The tubes give you a much closer focusing distance, enabling you to get really good close-up images without additional equipment, but at the expense of infinity focus (which isn't required for this kind of work). You can mix and match them to get different minimum focus distances. I only have two working ones, but I can't afford to get any more at present. For closer work, I use a cheap 80-300mm zoom lens. I mount a 5x or 10x infinite microscope objective onto this, using a mount I made myself by removing the glass from a filter that fitted onto the lens, and using epoxy clay to secure a suitable adaptor inside it. If I was into doing things elegantly, I'd just have obtained adapters with the correct filter size and screwed them together, but sometimes it's all just too much fuss and expense, and this is totally secure and it works. I also added black card to the reverse of it to stop internal reflections as much as possible. This was set-up to shoot the crinoids yesterday. The key to this kind of close-up work is focus stacking. If you take a single shot, the depth of field is tiny - in other words, most of the image will be out of focus. That's just down to physics, and whilst you can mitigate it by stopping the lens down (except when using a microscope objective, when you can't), image quality quickly begins to deteriorate, and it will never have much of an effect at high magnification. So to get around the laws of physics, you have to take a number of photos, with fixed focus, at different distances from the object. The higher the level of magnification, the more images are required. With the images of the teeth above, I used three images. The crinoids (5x magnification) used 54 images. At 10x, I will often take 250 images. You can then join the images in software. I use Zerene stacker. The end result is an 'impossible' image which has much wider depth of field than you could ever achieve in a single shot. I use a specialised piece of hardware to move the camera back and forth, called a Cognysis Stack Shot (https://www.cognisys-inc.com). This moves the camera in absolutely tiny increments (as little as 0.01mm) automatically, taking a picture each time and with piles of options. However, it is very expensive (I got it years ago, when I actually had disposable income). You can do this work with very cheap alternatives, like this macro rail: A system like this works great with the extension tubes, but becomes a lot more difficult when you're using the microscope objectives - it's very hard to be sufficiently precise, although a skilled person could probably gear the system down more. I took this image using the macro rail above, I think at 5x. However, the Stack Shot makes things much easier. In the photos I posted originally, I made a black background by folding pieces of matte black card. Having another piece of card slightly overhanging the fossils, with a deep empty space behind the fossils, meant that the background came out jet black. So that's it, basically. Image stacking, bounced light and light modifiers. It often takes a bit of experimentation to get it right, but if you have a camera, a tripod, a macro rail, a couple of flashes and some black card, you're pretty much away. Sorry if the above is unreadable waffle, but let me know if there are any questions.
  18. 9 likes
    So I was browsing our favourite auction site, and I came across these interesting specimens. The seller claims these all belong to the same individual, while at the same time, strangely, they are selling each bone separately. And while these bones are definitely real Kem Kem bones, I'm posting it in this forum because there is reason to believe the information that these belong to the same animal is suspect. All of these are sold as being from one individual Spinosaurus. This first one is definitely a Spinosaurid cervical vertebra. a fairly nice one. But the rugose triangular area on underside shows that this is in fact from a Sigilmassasaurus, one of the Spinosaurids from Morocco. From the length of the vertebra this can be placed somewhere in the back of the neck of the animal. Next specimen is also a Spinosaurid cervical vertebra. Though due to damage this one is harder to identify as Sigilmassasaurus. Again due to the shortness this seems to be a cervical vertebra from somewhere back in the neck. The dorsal spine though worn, seems to be not that big. So this might point towards it being Sigilmassasaurus as well. So seems fairly plausible if the seller says these belong to the same individual right? Now here comes the problem. This third specimen is listed as belonging to the same individual. But this is clearly a cervical vertebra from a type of crocodile. Since it's nice and complete we can see which way is the front and which is back. The front of the centrum looks to be concave, while the back of the centrum here is convex. This is typical of some crocodiles. But on Spinosaurids it's the other way around, with the front of the centrum being convex and the back is concave. So with that this specimen casts doubt on the whole claim that some of these specimens belong to the same animal. Which is too bad 'cause the fossils seem pretty nice. There were some other specimens as well. But these three were clearly identifiable.
  19. 9 likes
  20. 9 likes
    At the Ramada being sold by In Stone Fossils from Wyoming is this spectacular huge crocodile from the Green River Formation. If you are attending the show its a must stop but be careful it bites Beautifully preserved.
  21. 8 likes
    There is quite of bit Kem Kem dinosaur material coming on the market and some of it quite good. Will try address the identification issue on some items so at least you will know what your bidding on. This appears to match quite well with a Spinosaurid ilium, seller calls it a pelvic bone. Looks quite nice, complete with a concern are the areas circled in white. Not sure it's bone or matrix. Seller does comment on filled fractures and some are visible but that should not detract from the piece. What the seller is offering here is a Spinosaurus phalanx and claw toe bones. What I believe you have here is a Spinosaurid foot claw and a carpal (hand bone). So think about this listing as two separate bones not associated in any way. This is a listing of a Spinosaurus complete finger with claw. What I believe you have are 3 carpals from a Spinosaurid that are completely unassociated and are not a good match as a composite. Hard to say much about the claw other that it appears to be a foot claw of what cannot determine with photos provided. Again like the one above if you're interested in this bid it as 4 separate items. Seller has this as a Spinosaurus phalanx toe bone. I find it difficult to call this one since its a partial but looks more like a carpal. I dont think you can ID this to any specific critter, not much diagnostic and we know so little. Seller is offering these as 4 Spinosaurus phalanx toe bones. The two on the left look like carpals, probably from a Spinosaurid. The one on the far right is a phalanx but it's hard to determine from what dinosaur. The second from the right to fragmented to say. Seller here has 4 Spinosaurus phalanx toe bone for sale. They are toe bones and may be from Spinosaurid but who knows there are lots of other theropods in this region and identifying isolated bones is very difficult. If interested they should be identified as theropod indeterminate. Being offered as a Spinosaurus phalanx toe bone. It might be from a Spinosaurid but have same comments as above
  22. 8 likes
    More photos of a typical cave from where the Keichs are coming from. I also got a short video but it couldn’t be played when I upload it.
  23. 8 likes
    Utahs top Paleontologist Jim Kirkland posted this chart on the dinosaur fauna in his state. Pretty amazing diversity
  24. 8 likes
    I helped one of my friends make a hanger for his huge Ohio hash plate. I guestimate it weights 15 pounds. I learned this technique from Harry Pristis, and only slightly modified it from what he posted. I used two steel rods from Lowes, and two turnbuckles from Home Depot. The materials cost was about $10. I used a wire bending jig to create two W-shaped "hangers" as shown. This jig was one like this; costs about $5. I bent the end of the hangers over to hook onto the plate. I used two turnbuckles to attach the rods together- and screwed them tight. I probably could have used wire, but wanted to be sure it would never fall.
  25. 8 likes
    Welcome to the Forum. Definitely a Pecopteris sp. from the Rhode Island formation, Narragansett Basin. There is a plant site in Rhode Island, about 1/2 hour south of Somerset, in Portsmouth. The preservation is better in your specimen, though. Not as distorted. Also, there are some quarries about 45 minutes to the north west, in Plainville, Mass., that have produced plant fossils. I wouldn't be surprised if there were outcrops throughout that range, that may have been disturbed or uncovered by construction and farming in the area. (New England is famous for growing rocks in farmer's fields. ) Great example! Thanks for posting it. Regards,
  26. 8 likes
    Morph Type 7 (Abelsaurid indet.) Lateral Tooth Very Compressed Distal margin perpendicular to the base Mesial margin strongly recurved Distal denticle orientation is toward the tip Carinae extend to the base Serration Density: Distal: 2.5/mm Mesial: 2.6/mm Additional Example Morph Type 7A (Abelsaurid indet.) Typical Morph Type 7 but positional (Pre-Maxillary) Denticles on both edges orient toward the tip Morph Type 7B (Abelsaurid indet.) Lateral Tooth Very Large compared to Morph type 7 & 7A (50 mm) (Adult?) Distal margin perpendicular to the base Denticle orientation is toward the tip Carinae extend to the base Serration Density: Distal: 2.2/mm Mesial: 2.2/mm Morph Type 8 Position unclear Very Compressed, Bowed Distal margin perpendicular to the base Mesial margin strongly recurved Mesial carina extends to 3/4 of crown height Interdental sulci present (Blood grooves) Serration Density: Distal: 3.5/mm Mesial: 3.5/mm Additional Example
  27. 8 likes
    I don't remember if you posted a photo of this, but it is on my Christmas wish list (only $90K). I made a special trip over to the Fossil Co-op to see this after @Carl spotted it. The top of this petrified wood table is riddles with insect galleries, many of which are filled with termite COPROLITES!
  28. 8 likes
    A real small Ichthyosaur guess one meter
  29. 8 likes
    @Aurelius He didn't say what he was an expert at! I'm an expert forklift operator and I say it's an egg!
  30. 8 likes
    There are many incredible fossils here at the show. One of the top An Ichthyosaur from the 180-million-year-old Jurassic Posidonia Shale of Holzmaden in southern Germany. If you look closely you will notice four babies, if that's their mother or lunch
  31. 8 likes
    Had difficulty uploading these but finally success. Images quite small hard to read labels. British dealer at Tucson hotel
  32. 8 likes
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    Troodon basically has the show covered but I thought I'd add my two cents.
  34. 8 likes
    Here you go: Everybody has access to the Atlas (BIODIVERSITY HERITAGE LIB.), but the Text is nowhere to be found Simply based on morphology, you'd have to say fig. 1 seems a dead ringer
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    Back to the Ramada ET was here Texas Aguja Formation Hadrosaur Jaw Huge Croc Tooth Meet Dimetrodon from the Permian of Texas, yes its very real Getting Assembled
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    Altiocculus harrisi has 32 segments. Instead, this specimen with 24 segments matches better with Bolaspidella reesae. Robison, R.A., & Babcock, L.E. (2011) Systematics, paleobiology, and taphonomy of some exceptionally preserved trilobites from Cambrian Lagerstätten of Utah. University of Kansas Paleontological Contributions, 5:1-47 PDF LINK
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    Well a big part of Morocco economy is focused on the fossil industry. So lots of people/towns are focused just in collecting and processing them which results in a enormous amount of very diverse fossils to be distributed to every part of the world. The fossils are typically beautiful, fit a diverse collector base, and sold at every price point that collectors/dealers are looking for. It's an industry, a fossil machine unlike any other one found in the world.
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    The three venues that I visited today, Tucson Hotel, Ramada and 22nd Street were a flurry of activity getting ready for the grand opening on thursday. Visited a number of German and British Dealers today.
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    The burn test would help determine if it was older than a subfossil (~50,000 years old). Also, a number of your finds from this cave have been from recent bones, so it is not an unreasonable request to make to narrow down the possibilities. Perhaps appealing to the academic literature as opposed to commercial sites would be a much more authoritative source, in this instance. We are sorry that you are experiencing a loss of trust with the forum. We can only do so much with images. Members are always free to disagree with the identification, and are encouraged to take the specimen in hand to a paleontologist to confirm the identity of the specimen.
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    Yup that's a lower left mosasaur jaw from Khouribga, Morocco. Not the complete jaw though, this is the dentary bone. The exposed area is the inside of the mouth. The mosasaurs are quite a large group of animals. They are most closely related to snakes and lizards. They are large bodied marine reptiles. They basically look like big lizards, but instead of feet, they have fins. Identifying the exact species can be quite hard with mosasaurs. This one looks like it might be Eremiasaurus heterodontus due to the difference in dentition front to back. The teeth are quite slender and have smooth enamel, which also fits with that ID. Though I wouldn't rule out the possibility of it being Prognathodon sp.
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    Had an opportunity to take a close look at the BHI booth. I typically stay away from them since the area is very busy the first week. Here are some pictures. All of the ammonites/other are South Dakota Plant
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    There are some fantastic fossils at the Tucson Show this year but according to Pete Larsen president of the BHI tweets the star of the show, and the fossil of the day is this Middle Eocene Limnofregata, an extinct frigate bird from the Green River Formation of Lincoln County Wyoming. The feathers are still under preparation, but in my estimation, it is the most spectacular fossil bird yet discovered.
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    This is a Moroccan village of tents where you can find anything but where FAKES are common. The dealers here are very nice and will start high and negotiate. Here are flats of Dinosaur, Croc and Turtle material where treasures can be found you just need to be knowledgeable. However, its always very difficult to do since most items are Frankenstein and covered with matrix or glue. Great prices
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    Tucson Hotel This is very cool Ammonites from Canada with Mosasaur globidens predation tooth in marks on them on both sides ironosaurus Only Pine cones at I have seen from Germany @Nimravis Snake Eggs @HamptonsDoc Jasper
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    The ammonium chloride coating is temporary, it rinses off under running water. It is also the gold standard for fossil photography for publication, due to the significant improvement in visibility of detail. Don
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    My treasures for the day amounted to three teeth from the Aguja Formation of Texas. Two were Tyrannosaurid and a Nodosaurid. The largest at 2 inches. All in all a good day and I had the good opportunity to meet BadlandTraveller a newbie at the show. A great experience for Brett and hopefully not his last visit. We always like Canadians to spend their money in AZ
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    More English and German Dealers Ichthyosaurus jaw
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    A dealer from Down Under provided these beautiful crinoid specimens, not cheap The Ramada Inn is next Believe Sabercat skull is from Asia Modern Shark Jaws Fossil reconstructed Jaws
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    Today there was a significantly larger amount of dealers working hard to get set up. Only a few new ones opened but activity is definitely at a peak. I will start off my photos again at the Tucson Hotel. The photos I take are primarily from fossils dealers since this is a fossil site but the majority of dealers at this venue are mineral from every continent in the world. The specimens they have are incredible and worth just visiting the show if that's your area of interest. You would need days just to check them out. Now on to more important subjects fossils Tucson Hotel One of the largest Tronychidae turtles to come out of the Green River Formation, Wyoming an unbelievable specimen as big as a person 6ft long. The photo do not do it justice. Another unbelievable specimen from the same quarry and worth just going to the show to see is this Eocene horse called "The Dawn Horse" collected in 2003. It was examined by the Chicago Field Museum for study but the owner and Museum could not come to terms on a sale. its about the size of a midsize dog. Very complete. Same quarry a Garfish Always room for Kem Kem material A Croc vert Sauropod and Pterosaur teeth Theropod Teeth Canada Fossils always brings an extraordinary number of large ammonites. These are outside the ballroom where they reside its still closed.
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