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I recently attended an estate auction where a bunch of crystal and mineral specimens were sold from a decades old collection. A very large “petrified wood” specimen caught my eye immediately. Apparently the collector didn’t have any records to help identify the specimens and the auctioneer was oblivious. I can say without hesitation, this is not petrified/fossilized wood. It is a massive dorsal or possibly caudal vertebra. I believe it was found in the U.S. since basically all the other specimens from the collection originated from the U.S. or Central America. I am fairly confident it is from a sauropod. Can anyone confirm this identification? Also, as a an interesting side note, when tested with a Geiger counter it’s pretty warm. Measurements are in inches, sorry it’s what I had available.

Hi all. This bone fragment is advertised as a dinosaurian rib fragment. It is over 4 inches long. Is it possible to say something more about this fragment? Is it indeed dinosaurian, and if so, did it belong to a theropod or a sauropod? And is it a rib? I did a quick online search but could not find a matching cross section myself. Thanks!

Hi everyone! I'm helping out a new buddy of mine with this one. He acquired this bone a few years ago under the pretense of it being a "Triceratops hip or leg bone". He's currently selling it and the rest of his collection off to pay for some medical expenses, and I've been helping him try to verify the ID on some of his things since the original seller's IDs for several have been, well, I disagree with some of them. I'm just going to leave it at that. Anyway after contacting the original seller for some more info on his collection, and some remarks by several interested parties it came out that this bone might have been mixed up in it's original ID and is actually Sauropod, specifically the pubis. We're currently trying to get more info on locality, but in the meantime I thought it would help to get an independent opinion on what this is most likely from so I'm posting on his behalf. He described it as roughly 21 inches long so about 53-54 cm. While we wait for more potential proximity info (if it even exists anymore) if there are any other measurements or spots that need better photos tell me an I'll let him know. Any insight is appreciated as always!

Hello everyone, i saw this mid caudal vert from the Kem Kem on a seller website and i directly understand that it can’t pertain to spinosaurus ; so i compared it with caudals from Ouranosaurus and titanosaurs and i see similarities but i need other opinions to be able to decide for the identification. The first image is the vert from the Kem Kem, the secound is caudals of Tambatitanis (a titanosaur) and the third is a caudal from the Venice Ouranosaurus specimen.

Hi everyone! So first and foremost let me say, it's not a composite. Yes I know there is some sediment where the process meets the centrum, yes it is Moroccan, yes 99.9999999% of the time that automatically means funny business but I've looked at the area really carefully and the bone connects there (might try getting rid of some of that matrix at least on one side depending on what it's from). Anyway, I'm on the fence on this one. I was comparing it to a similar thread where a fellow asked about a caudal vertebra from the kem kem which turned out to be croc but was sold as Rebbachisaurus. In the thread some pics were posted of Titanosaur caudals and this looks really similar to that versus the examples of Crocodyliforms that where shown. But before I take that leap I would like a second opinion. The dimensions are 2.25 in. (6 cm) long, 1.85 in. (4.7 cm) tall, and .83 and .75 in. (2.1 and 1.9 cm) wide on its centrum. I also included the pic from that thread of Titanosaur caudal that was posted by Troodon.

Hi everyone! I'm helping a friend go through a large amount of Cretaceous Moroccan stuff and came across this piece. It measures 6.3 x 6.5 x 4.33 inches (16 x 16.5 x 11 cm). I know it's the process of a huge vertebrae, but I'm not entirely sure from what. I'm thinking sauropod but I was hoping to get a second opinion. Any feedback is appreciated as always!

I have been reading my copy that I have of The Tyrannosaur Chronicles, and in the chapter about prey, there was a picture that was captioned Hell Creek Prey. There were Edmontosaurus, Triceratops, Thescelosaurus, but there was also a sauropod. I looked through @Troodons topics about the hell creek fm and also the wikepedia page about hell creek fauna. Is the book outdated or is there actually a sauropod dinosaur in the Hell Creek Formation?

Good morning, I Saw this vertebra for sale and advertised as a Sauropod cetiosaur, since I'm not an expert I would like to ask if you guys think it's a true sauropod vertebra or It can be instead of a pliosaur, or plesiosaur since they are more common. Thanks In advance

Please look at these pictures of a dinosaur bone I bought not so long ago. Seller says it's from Duriatitan humerochristatus(a british Titanosaur),but it is from a different location to the other Duriatian remains and is not a very well preserved bone. It's from Abington, Oxon, UK Kimmeridge clay. Please write your opinions Thanks!