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  1. I spent some time meandering through South Dakota in May, taking in the sprawling forests and mountains. It’s truly a beautiful area of the country with plenty to see and do. ^ Pareidolia clearly in full effect. Since I was in SD, I knew I had to pay a visit to the BHI - and if you happen to like fossils, I think you’ll enjoy tagging along. The BHI is a private company which specializes in producing cast replicas for museums and the general public. Until October 2020, they played host to the T. rex “Stan,” who was auctioned off for $32 million; it has recently bee
  2. Marco90

    Merycoidodon culbertsoni

    From the album: My collection in progress

    Merycoidodon culbertsoni Leidy 1848 Location: Brule Formation, White River Badlands, South Dakota, USA Age: 34 - 23 Mya (Oligocene, Paleogene) Measurements: 3x6,5 cm Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Mammalia Subclass: Theria Superorder: Laurasiatheria Order: Cetartiodactyla Suborder: Tylopoda Family: Merycoidodontidae
  3. Kurvinosaurus

    Petrified Wood or Just Rock?

    Found this in South Dakota with other petrified wood. I’m just wondering if this piece is for sure petrified wood, or just a rock? Thank you!
  4. Found this near little elk creek in Piedmont, SD at the base of the Black Hills. After some research, Pennsylvanian age shark material has been found there in the past. These are much smoother than some images I have seen online. Thoughts?
  5. Hello, I recently bought this tiny bone fragment, a supposed piece of Tyrannosaurus rex vertebral process, from the Hell Creek Formation of Harding County, South Dakota of USA. I know nothing about ID'ing dino bones or bones in general. The seller's rationale for the ID was that the porous honeycomb structure is diagnostic of large theropods, with the only one in this formation being T. rex. Does the ID seem correct? Is this T. rex proper or is that impossible to determine? The piece is 3 cm long. I've propped it up to better visualize the large pores inside the fragmen
  6. My Spring trip this year was quite a challenge. Last year we had oppressive heat, it was extremely dry with high winds. This year it was rain, rain and more rain and cool. The ranchers however are in heaven with pastures that are green, green and green. Hopefully it continues for them through the summer. So, we had a few rainout days, lots of drizzle and had to deal with gumbo feet, slippery cliffs and wet bones and matrix. Not the best of conditions for collecting and the group's results showed that. On the downside the day we departed Belle Fouche, where we stay, a ve
  7. More goodies from the same site as the sandstone nodules. Some of this looks like wood to me and one seems highly probable to be a bone fossil. Sorry no metric on the tape measure I'll look for a duel standard measure next time im in town.
  8. MagisterLudi

    Fossilized sugar cookie? 1.5" - ~4cm

    Found these in southwest South Dakota. Looked at thousands of images online before troubling you fine folks. Found in an arroyo below layers of possible fossilized bone and a layer with a variety of chalcedony/agate
  9. Seanrad09

    Hell Creek Bone. Ankylosaur?

    Another one looking to ID. Judging by some of this bone’s characteristics, me and some friends are leaning ankylosaur. It looks similar to a skull piece I saw posted online as well. What are your thoughts?
  10. MacHoffman22

    Unknown Fossil Bone ID

    I found this specimen where I have found most of my others, near a cow pond off of Vermillion Lake about 16 miles from Sioux Falls. I am very curious as to what it might be true to it's smooth and refined shape.
  11. I was looking at some of my collection yesterday and dextrose take pictures of my better mammal brain endocasts from the White River Badlands of South Dakota. The first piece is exposed on a partial skull of an Oreodont. This next piece is my favorite and I believe it is from an Oreodont. These other pieces I can only guess, but I would also think Oreodont. This small one appears to be from a rabbit. This last one was ID’d as coming
  12. I have 2 small selections of shark teeth that I recently acquired in a collection that I had purchased. These teeth are supposed to have been collected in North Dakota and South Dakota. The first selection was collected on 4-3-1986 in Moffit, North Dakota in the Cannonball Formation, which was referenced by the collector as being Paleocene (58 MYO). The next selection was collected in Edgemont, South Dakota from the Late Cretaceous, Green Horn Formation. Any help on th
  13. Nipponites

    Partial mammal lower jaw-Brule fm.

    Hello, I have just received this partial lower jaw, it is supposed to be from Leptomeryx evansi, but i have seen many skulls of L. evansi on the internet, and this doesn't look similar. It comes from the Oligocene of Orella member, Brule formation; South Dakota. I have got three questions; Who did this jaw belong to? What part of the jaw did these teeth occupy? Is that hole on the first photo normal? Or was made by an animal or disease? Thanks to everyone!
  14. Hello, I had a question about the coloration of the beautiful South Dakota ammonites from the Fox Hills formation/Pierre Shale. Namely, many Hoploscaphites/Discoscaphites ammonites have a milky white nacre of the shell, whereas others seem to have a vibrant red/brown sheen. For example here are two photos of Hoploscaphites nicoletti I found demonstrating the two types of colorations: I was wondering what causes the difference in this coloration, and whether one is more rare/valuable than the other? I want a nice South Dakota ammonite for my collection
  15. hadrosauridae

    It was a baculites graveyard

    Fossil Friday once again! This is the last of the South Dakota exploration trip, hunting the Pierre shale for cephalopods and hopefully a mosasaur. Although the first half of the Pierre shale exploration went pretty slow, it wasnt without a few nice finds. The second part, we were extremely fortunate in that we got to meet Neal Larson and hear a short talk about the local Pierre shale formation, and then he took us out to his personal hunting site.
  16. PaleoNoel

    Interesting Hell Creek Vertebra

    Hi everyone, I found this little, mostly complete vertebra in the Hell Creek formation of South Dakota in 2019. I don't really know what to make of it as it's very porous, and amphiplatyan (flat on both sides), although I'm not sure how much of that could be attributable to wear. I believe it's safe to cross of squamate (due to lack of concavity) and champsosaur (overall shape) off the list. While most of the crocodilian verebrae I have found in the hell creek have have a convex and concave end, I am aware that some can be found that are flat sided. The porosity of the bone makes me hopeful th
  17. PaleoNoel

    Pocket Gopher Femur, SD

    Hi everyone, I was just browsing @PrehistoricFlorida's website and my eye was caught by what was labelled as a pocket gopher femur (trust me there were many more impressive fossils that caught my eye as well). Reason being, I found a very similar bone on a hunt in South Dakota's Hell Creek formation back in 2019. I kept it, hoping in my heart of hearts that it was fossilized, but keeping my expectations low. The rusty staining on the bone made me think there was a chance it was just a beautifully preserved Cretaceous limb bone, but I knew it was most likely recent. It's about 2.5 cm long and .
  18. Happy Christmas eve, Merry Christmas, Happy Holidays and a prosperous new year! It may be Christmas eve, but its also Friday, which means its a Fossil Friday. I missed las week due to being sick. Today's video offering is from the first day of a long, multi-day fossil exploration trip in South Dakota.
  19. fossilhunter21


    From the album: Fossilhunter21's collection

    Fossil Type: Unidentified Bone Location: Pennington County, South Dakota This fossil was prepped by myself.
  20. fossilhunter21


    From the album: Fossilhunter21's collection

    Fossil Type: Unidentified Bone Location: Pennington County, South Dakota This fossil was prepped by myself
  21. fossilhunter21


    From the album: Fossilhunter21's collection

    Species: Jelezkytes spedeni Location: South Dakota
  22. Just returned from my fall collecting trip to South Dakota. Will focus on my finds and I've attached a couple of prior trips to see more of the area, fauna, finds and collecting gear. Spring 2021 http://www.thefossilforum.com/index.php?/topic/115998-spring-dinosaur-dig-in-south-dakota/ Fall 2020 http://www.thefossilforum.com/index.php?/topic/109554-collecting-trip-hell-creek-formation/#comments Before I get into my new finds here are some prepped items from my last two trips that I have yet to share A possible Troodontid metatarsal
  23. hadrosauridae

    2020 Hell Creek trip

    I know its not the most recent trip, but I finally completed the video for this annual trip to hunt for dino fossils in the Hell Creek fm of South Dakota. Next week I should have the video of the prep of the Neural arch and spines finished.
  24. Hi all, with Covid making it impossible to attend any shows here last year I was able to visit the Munich Show last weekend. Among others I’ve bought this tooth. Ive learned from you guys not to trust the ID done by the seller so after reading some posts here I doubt that the tooth is a ankylosaurus magniventris. To me it looks more like a Thescelosaurus. Am I correct with this opinion? Details provided by the seller: Hell Creek Formation North West South Dakota Thanks in advance for your expertise!
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