All Activity
This stream auto-updates
- Past hour
-
Who would have believed it, Dinosaur remains from Peterborough, UK
DE&i posted a topic in General Fossil Discussion
Additional sauropod dinosaur material from the Callovian Oxford Clay Formation, Peterborough, UK: evidence for higher sauropod diversity. Who would have believed it, Dinosaur remains from Peterborough UK ! Four isolated sauropod axial elements from the Oxford Clay Formation (Callovian, Middle Jurassic) of Peterborough, UK. “But wait, how can that be” is the response I usually receive “how is that even possible for sauropod and marine reptiles to coincide from the same Oxford Clay Formation deposits of Peterborough” Well, the time and effort that Femke M. Holwerda, Mark Evans and Jeff J. Liston have put into explaining such finds in this write up makes for a much-needed thought provoking read indeed. The full PeerJ article PDF version is at the link below. https://peerj.com/articles/6404/ “Femke, Mark and Jeff thank you for the acknowledgement I really appreciate that” -
Roger the intrepid. Doesn't let snow and ice get in the way of his ammonite pursuits. Congratulations. Nice haul, especially given the conditions. As always- love to see the results once they're prepped.
-
I agree. The concretions from Madagascar often show shrinkage cracks that have already formed during fossilisation and can no longer be glued together without a gap. In Madagascar, a very elastic contact adhesive (similar to "Pattex") is normally used for bonding. The contact adhesive is applied to both halves, the solvent is allowed to flash off and then both halves are pressed together. This adhesive (this method) does not produce good bondings with small gap widths. For fish from Madagascar I normally use a thick cyanoacrylate as suggested by Ptychodus04. It is important to completely remove the old glue before applying the cyanoacrylate glue. I put the concretion into an acetone bath (there all glues come off and the glue residues can be removed). Nice Coelacanth (Whiteia woodwardi) by the way. Thomas
-
DinoFest 2019 Natural History Museum of Utah
jpc replied to UtahFossilHunter's topic in A Trip to the Museum
Did you talk to anyone there about volunteering? This would be a great place to spend your spare time. -
First, welcome to the forum! You are in the envious position of being in a very fossiliferous part of Florida. You'll find lots of information on fossil finds near you if you search the Florida section (scroll down on the TFF home page) or search for terms like "peace river" in the search box. As others have mentioned, not much cleaning is usually needed for Florida fossils. The slightly whitish haze on the megs can probably be cleaned off with an old toothbrush or other scrubby brush and some dilute acid (I like to use distilled vinegar). Rinse thoroughly after and if you'd like to darken the color and add just a bit of shine to the teeth, you can rub them with a bit of mineral oil on an old cloth. The colors are not (as noted above) particularly due to age or shark species but more about the composition of the matrix (surrounding material) that they've been buried in. South Florida is full of phosphate (and phosphate mines). This tends to turn teeth grayish to black which is a very common color for teeth found in the rivers or along the shore. Most of the fossils on the beach or found while diving snorkeling have been washed out from the mainland through the rivers. Areas with iron-rich clays tend to produce reddish-orange teeth, grayish clays tend to produce more cream colored teeth. Most of what you'll encounter in Florida will be in the gray to black hues but occasionally you'll come across some teeth (like the brown one you have) that display a more interesting coloration. You might wish to join the Tampa Bay Fossil Club which is in your area. Another great place to learn about local fossils and get out on some trips as well. https://www.tampabayfossilclub.com/ Cheers. -Ken
-
Small velociraptorine Nuthetes hand/foot claw
Birdman replied to Birdman's topic in General Fossil Discussion
Yes, I'm finding that is the problem! Assuming it is adult, that it would be smaller than the smallest known theropod dinosaur and that is a problem. If someone can show me that Mesozoic bird claws can be similar to small theropods then bird would be a real possibility. It would be more exotic if it were bird. -
I am seeing turtle in that claw. Not sure about the other bone.
-
My one question is as follows: Can you run a shop vac for an evening's wort of dust collection, or will that burn out the motor? Also, this sounds like it is quite loud. Get it!?... Sounds Like.. Loud...
-
Yeah I saw that listing. Looks very similar to other mammal claws that can be found online. Here's a picture that looks very similar to yours, these were also found in the Hell Creek Formation. Regardless of what it is, it's still a cool piece of history
-
I now have around 5 hours of dust collection using the modified trap and have not found any water getting pulled into the vac. I would label this a success.
-
I agree, a low viscosity cyanoacrylate will work here. I would only apply from the front though as a minor over application of the glue to the rear would allow it to run out onto the fish. Paleobond also sells small tips for their bottles to allow precise application. Glue the loose crack first and clamp the piece to put pressure on the joint. a bar clamp works well for these as it is very adjustable. Let it sit for at least 24 hours clamped. If the other cracks are not moving, you can simply add glue without clamping to ensure they don't open up.
-
Small velociraptorine Nuthetes hand/foot claw
TyBoy replied to Birdman's topic in General Fossil Discussion
Thank you. Given the size wouldn't one lean toward bird? @Auspex -
Small velociraptorine Nuthetes hand/foot claw
Birdman replied to Birdman's topic in General Fossil Discussion
I left the matrix alone on the other side, the claw is too small and the matrix is fragile. - Today
-
DinoFest 2019 Natural History Museum of Utah
jdiaz55 replied to UtahFossilHunter's topic in A Trip to the Museum
Glad to see you made it out for DinoFest! I had the opportunity to sit with one of the lab preparators and chat with him about his tools and job and work a little bit with his scribe on a femur he had out, what an awesome museum trip! -
Small velociraptorine Nuthetes hand/foot claw
Birdman replied to Birdman's topic in General Fossil Discussion
Thank you for your comments and compliments everyone. TyBoy: It measures 5.5 mm. It's a preliminary id but there are only two known theropods it could belong to. And we have Nuthetes and Ashdown mainiraptor described from the Purbeck/Wealden, it could be either of those. Wyleyiia valdensis is considered a bird. It certainly is theropod dinosaur going by the morphology.No other theropods this size have been described from the mainland wealden. Have found several of these this size. As far as I know, they are possibly the smallest theropod claws ever found in the Wealden. The claw is very narrow and the blood groove (either side) is obvious. As we can rule out bird it only leaves small bird size theropod. I have seen images of bird claws and the ones I have seen are distinctly different to theropod. Going by its size, I have estimated the size of the animal to be about the size of a magpie. I have another surprise, another new find that should be of great interest. More later on that.- 7 replies
-
- 1
-
-
- velociraptor
- claw
- (and 2 more)
-
Hey, I got these from online and the description says they are pleuroceras ammonites from the jurassic. I just wanted to be sure if this is correct? Also there's a small belemnite rostrum piece, but I guess it's to small to determine the species? Greetings Henning
-
I would be concerned about stabilizing all these cracks. It is not particularly difficult. I would use Paleobond pentrant/stabilizer or a similar cyanoacrylate. Apply it into both sides of the cracks. After it dries, apply a thicker cyanoacrylate to strengthen the gaps (Paleobond and Starbond are 2 of the larger distributors of suitable viscosities). Making the cracks disappear would be a bit involved, requiring epoxy putty and paint.
-
Hello Mykalakaitlyn Your fossils are nice. It doesn't look like they need a lot of cleaning. If you want, you can put them in a dilute vinegar bath to remove impurities attached to the teeth. Don't leave them in for too long. The different colors are caused by the surrounding rock that the tooth was fossilized in. Phosphate = black, limestone = white/yellow, tannins from leaves = brown/red.
-
Great finds! I would love to come to Florida and find some meg teeth... Teeth like those - probably just a wipe down and a light brushing with a toothbrush, as they seem pretty clean as they are. Those look slightly worn, but still very nice. I could be wrong, but I believe coloring on most fossils is more about the replacement mineral than the age of the organism when it expired. More experienced members will likely comment soon. Thanks for sharing your teeth.
-
Hi, What are these green brown minerals ? May we have close-up ? Coco
-
So I got someone at home to take some photos. Here is the item in question. The crack in the middle of the body is the one of concern If I put (gentle) pressure on either side, the crack on the surface widens.
-
Hello hello. I'm new to this whole fossil thing! although this forum community has informed me with so much more then I could ask I still have some silly questions. Should i clean shark teeths? And how can I decide what condition my shark teeth are in? Also here are some interesting finds I found on Englewood beach, Florida. Super early on 2/20.... oh and could someone give me a run around on different colors? Like blue,orange,black, sometimes yellow. Does that go about age or shark?
-
The Cretaceous Potomac Formation extends from New Jersey to southern Virginia. The Traditional view of the Potomac Formation is that it was deposited in a fluvial environment. Plant and insect fossils would definitely fit within this fluvial environment. Out of the Potomac (three divisions of the Potomac are formally recognized: the Patuxent, Arundel, and Patapsco), the Arundel Clay is the only one that contains an appreciable vertebrate fossil record. The Arundel Clay has produced dinosaur, mammal, reptile and fish vertebrate fossils. If you want a good overview of the Arundel Clay environment check out the paper at the below link: https://palaeo-electronica.org/content/pdfs/847.pdf The paper’s conclusion : "Traditionally, the Arundel has been interpreted as being of fluvial origin, deposited in a freshwater system of stranded channels or oxbows. Based on faunal composition, together with published geological and sedimentological evidence, we propose that at least some of the Arundel facies was deposited in close proximity to the Atlantic Ocean." Whether you consider the environment as fluvial or near Atlantic Ocean brackish water swamp, you wouldn’t find Globidens in this environment. Take the specimen to a museum for a proper id. Marco Sr.
- 6 replies
-
- 1
-
-
- cretaceous
- globidens
- (and 8 more)
-
Winner of the January 2019 Vertebrate Fossil Of The Month
Troodon replied to digit's topic in Fossil of the Month
Congratulations nice write-up and find. -
Thanks ynot, I appreciate that!
.thumb.JPG.d64a00de120fb553baacff5149461632.JPG)
