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  1. Hello all. I was hoping for additional insights on what this may be as well. I know this is a vertebrate bone of Cretaceous age found near block mountain outside of Dillon Montana during a classical mapping trip. On one side of the specimen there is a prominent yet thin plate of bone with a robust ridge along one margin. On the opposite side of the specimen is a rectangular structure which may be a scute or possibly another type of mineralized structure. Any insights are appreciated.
  2. Crinoids

    Muddy creek plant with roots

    Was wondering if it would be possible to ID this plant, seems to have roots attached. Muddy creek formation Montana usa
  3. oilshale

    Polychaeta non det.

    From the album: Invertebrates

    Polychaeta non det. Early Carboniferous Serphukovian Heath Formation Bear Gulch Montana USA
  4. From the album: Invertebrates

    Typhloesus wellsi Melton & Scott, 1973 Early Carboniferous Serpukhovian Heath Formation Bear Gulch Montana USA In the beginning, it used to be believed that Typhloesus were conodont animals, a group of extinct agnathan vertebrates. The conodont teeth however were actually located in the gut contents of the Typhloesus, meaning that while it wasn't a conodont, they were a part of its diet. A new paper published revealed several potential mollusk-like features of the animal.
  5. Hello, I am trying to identify if this is a T. rex tooth. It's described as "natural juvenile Tyrannosaurus tooth". Location: Hell Creek Formation, Montana. Dimensions: Height: 4.3 cm Width: 3.8 cm I've read this awesome post by troodon, and I'm leaning towards T. rex ("fat" and rounded tip) - but looking forward to seeing your opinions as well. Thanks and have an awesome day ahead!
  6. oilshale

    Acanthodes lundi Zidek, 1980

    From the album: Vertebrates

    Acanthodes lundi Zidek, 1980 Lower Carboniferous Serpukhovian Heath Formation Bear Gulch Montana USA
  7. hemipristis

    Dermal scute? Epiphysis?

    Picked this one up at a rock shop when I was back in Philadelphia over Christmas. The lady working that day said this piece was bought by the owner with a bunch of dino bones (mostly vertebra) that the finder said was from Montana. No other info. The vertebra that were in the box with this were definitely dino, but in rough shape, so I didn't grab any. This is 13cm x 11cm x 8 mm thick. It is solidly lithified, and resembles agate. Based upon shape, my first thought was epiphysis, but do reptiles have those? Then I wondered if it were a whale epiphysis mixed in with the dino material inadvertently. But it is agate and very solid, which is unlike any cetacean epiphysis that I've seen. The patterning on the front and back also don't remind me of the cetacean epiphysises (epipysisi?) that I've seen. The texture does indeed remind me of dino bone. So then I wondered if it were a dermal scute. Thoughts?
  8. Hello, I saw this Struthiomimus foot on auction today, and wanted to ask If theres some restorations on it. The description says that its real and from one specimen. It looks very real to me, but i'm not sure, because of the irregular number of the toe bones. Maybe some of them are missing. But i'm not an expert, maybe someone knows it better. It was found in the two medicine formation, Montana. Its about 24cm or 8 Inch in length.
  9. Bahagma

    Unknown Items

    I found these laying on the ground when I was out horn hunting. Any ideas on what they are?
  10. patrickhudson

    Maybe a Pachy dome?

    Found this guy in the JRF of Montana. Looks like a veneer of a Pachy dome - especially with the one portion of the underside that isn’t eroded. Thoughts? it seems like an exact copy of a full dome we found a couple years back. or…. Astrogalus???? thanks!!
  11. Horse brain trace fossil probably from Montana
  12. LeytonJFReid

    Mammal jaw from Montana

    On college ruled paper, 1 line = 7.1 mm
  13. LeytonJFReid

    Equid jaw from Montana

    On college ruled paper, 1 line = 7.1 mm
  14. LeytonJFReid

    Equid jaw from Montana

    On college ruled paper, 1 line = 7.1 mm
  15. LeytonJFReid

    Mammal jaw from Montana

    Mammal jaw from Montana
  16. LeytonJFReid

    Equid jaw from Montana

    On college ruled paper, 1 line = 7.1 mm
  17. LeytonJFReid

    Mammal canine from Montana

    On college ruled paper, 1 line = 7.1 mm
  18. LeytonJFReid

    Mammal jaw from Montana

    On college ruled paper, 1 line = 7.1 mm
  19. hcpiv13

    Are These Leaves?

    I was shown this rock recently and am trying to get an ID. It was found near Weldon, Montana, USA in a wash. Likely from Paleocene age Fort Union Formation. I thought they were leaves initially, but at least one white section looks more like a vein when seen in cross section. That can be seen in the fourth photo, center left. Sample is approximately 14 x 12 x 4 cm. Outer brown layer of the rock has a very glassy texture. Any guidance would be appreciated.
  20. ThePhysicist

    A Sea in the Mountains

    It's 8:30am, below freezing, and cloudy - the perfect time to hike up a mountain to collect fossils! A rock-hounding buddy of mine recently stumbled upon a hash layer on one of the hikes we've done in Montana, and kindly offered to show me. Unfortunately the layer wasn't at the beginning of the trail, rather the end, so we had to climb 1,900 ft (6 statue of liberty's) and millions of years in geology to get to it - nature is rarely conducive to human ambition. After the short (2.5 mile) but steep hike, we made it to rock slides where the layer was being eroded and immediately began spotting plates of brachiopod hash - I can't believe I missed them before! Based on the geologic map of the area, I suspect these are Late Devonian-Early Mississippian in age. Wacking my geologic pick into the hill to carefully climb the steep slopes of the rockfalls, I began spotting some nice specimens. They were preserved in a pretty powder blue, and easy to spot against the dark matrix of the ancient sea floor. Unfortunately a lot of them appeared smashed in their tumbling down the hill. I loaded up my backpack with probably 40-50 lbs of rock, which in hindsight was not the best decision I've ever made. Here are some of the more interesting pieces (I don't know them any more precisely than "brachiopod", feel free to chime in brach fans): I was especially hoping to find a winged brach - I didn't find a nice one - but my friend generously gifted me one he found minutes after I mentioned hoping to find one. Hope you enjoyed! I'll be headed back to Texas where I have more trips in mind...
  21. schli008

    Id please!

    Recently found on a float trip in Central Montana in the Missouri breaks. Roughly 3 inches long.
  22. JorisVV

    Hill County Raptor tooth?

    Hello everyone! Here is a nice raptor tooth from Montana, JRF Hill county. Another collector and I were wondering what the species is likely. Especially with those ridges. Back then bought as a Saurornitholestes.
  23. This is a tooth that lets me doubt the label… It was sold as “Albertosaurus”. Provenance is Hell Creek Formation, Montana. But to my understanding there is no Albertosaurus in the HCF of Montana or am I wrong? The serration count is 3 per mm and 2.5 per mm. Has someone got an idea what it might be?
  24. Fellow members, I am considering purchasing this tooth which is advertised as being a T. rex tooth from the HCF of Carter Co., MT. The seller isn’t able to provide the nearest town. The enamel isn’t perfect but I am guessing that much of the value will be in the length. I am told that there is no repair nor restoration - can anyone see any evidence that might suggest otherwise? The description also states that there is some partial root present. From research, it seems to be an average specimen as is typically found. Or perhaps somewhat above average given that most teeth found are in a worse state. Might members agree that this is a nice 2” T. rex tooth (albeit with some enamel missing) at this price point. There are better out there but those perfect examples will be well north of much more, one suspects. Thankyou in advance.
  25. I found this while I was hunting in southeastern Montana. Carter county. Not sure that it is a fossil but seems too smooth and regular shaped to not be. Any help would be appreciated.
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