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Found 13 results

  1. Hello, this is a small jaw segment from the White River Formation (Poleslide Member of the Brule) from Weld County, CO. This is one of a few jaw segments I cannot white identify. It does not look like the Leptomeryx jaw segments that I have collected (and indeed is even too small to fit that genus), and the shape of the teeth to me do not look like they belong to an Artiodactyl of any kind, so my best guess based on picture browsing is Ischyromys but I could be very very wrong here so I appreciate any help. Thanks!
  2. Hello! This is a small fossil from the White River Formation of Weld County, Colorado. To me it appears to be a set of front incisors rooted to a small piece of the maxilla or mandible. There are no teeth or tooth sockets next to the two that are there, and so this makes them look like the two incisors characteristic of rodents and lagomorphs. Interested if anyone can tell me anything else about them. Two photos are through a stereo dissecting microscope at 20X magnification, the other two, though blurry, should give a sense of scale. The entire fossil is about 9 mm tall, with the tooth crowns themselves being about 4 mm tall. Thanks!
  3. White River potentially hollow (avian?) bone

    Hello, everyone, Lately this summer I’ve been doing a bit of casual fossil collecting (with explicit permission!) on some land that a very close family friend owns in Weld County, Colorado that has a lot of exposure of the White River Formation, and I’ve collected a sizable amount of material including some pretty awesome finds. Being an amateur, I need some help identifying some of the fossils I’ve collected. Since the forum has a photo upload limit per post, I’ll be making a few threads for different finds, I hope that is ok. This small bone appears to be hollow, which indicates to me it might be avian but that may or may not be the case. It does have a ridge/process on the lateral surface which may aid identification. Location (as stated above) is Weld County, CO, on the Brule Formation. Thanks!
  4. White River Teeth ID

    Hello, everyone, Lately this summer I’ve been doing a bit of casual fossil collecting (with explicit permission!) on some land that a very close family friend owns in Weld County, Colorado that has a lot of exposure of the White River Formation, and I’ve collected a sizable amount of material including some pretty awesome finds. Being an amateur, I need some help identifying some of the fossils I’ve collected. Since the forum has a photo upload limit per post, I’ll be making a few threads for different finds, I hope that is ok. The following are two teeth that I found very near to (but not attached to) a piece of jaw bone. My current hypothesis is that these two teeth are associated with the same jaw. From Weld County, CO. Though hard to tell from the pictures, tooth #1 does have a distinctive ridge at the apex of the crown, though this could just be wear. Tooth #2 appears only to be a fragment, and a small fragment at that, and so may or may not be identifiable unless it turns out they’re from the same animal and the first tooth is identified. #1: #2: Thanks!
  5. White River Small Partial Vertebra ID

    Hello, everyone, Lately this summer I’ve been doing a bit of casual fossil collecting (with explicit permission!) on some land that a very close family friend owns in Weld County, Colorado that has a lot of exposure of the White River Formation, and I’ve collected a sizable amount of material including some pretty awesome finds. Being an amateur, I need some help identifying some of the fossils I’ve collected. Since the forum has a photo upload limit per post, I’ll be making a few threads for different finds, I hope that is ok. This is a small partial vertebra, collected in Weld County, CO on the Brule Formation. The piece next to it is one of the transverse processes, which was barely attached when I collected it but finally unfortunately broke off when in my bag. Any identification appreciated. Thanks!
  6. White River Formation Small (toe?) Bones

    Hello, everyone, Lately this summer I’ve been doing a bit of casual fossil collecting (with explicit permission!) on some land that a very close family friend owns in Weld County, Colorado that has a lot of exposure of the White River Formation, and I’ve collected a sizable amount of material including some pretty awesome finds. Being an amateur, I need some help identifying some of the fossils I’ve collected. Since the forum has a photo upload limit per post, I’ll be making a few threads for different finds, I hope that is ok. These are two small bones that look very similar, from Weld County Colorado. To me they look a lot like the toe bones of ruminants like deer, but I’m wondering if anyone has any better or specific guesses. #1: #2: Thanks!
  7. Hello everyone! Prior to the lockdown and money getting tight I won this at an auction, and it finally arrived today. What are your opinions and observations regarding its authenticity? I was also wondering about the white areas that appear to flow seamlessly with the specimen- is this also a binding product? It did say that it had restoration, and it’s clear that grey plaster/cement has been used, particularly at the front of the jaw where it appears to have previously broken. Thanks in advance!
  8. While playing with my poo (the fossilized version), I noticed this imprint. It is adjacent to a bone fragment. I'm assuming it is the imprint of a piece that broke away from the bone inclusion. It looks a bit unusual/ornamental, but I am hoping it is recognizable to one of you brilliant bone folks. This is from the Oligocene, Brule Formation, South Dakota. @Carl
  9. I have had a bunch of broken bits of Oligocene mammal coprolites sitting in a cup for years. I got them before I had a proper microscope. I decided to pick through another one last night. This one had what I thought could be a rodent incisor. So I started excavating with my X-acto blade. As I uncovered the bone, I realized it was not a tooth. I started noticing these very fine crescent shaped objects (which I unfortunately did not photograph). So I decided to give the poo a little vinegar bath overnight. As I lightly removed an unremarkable bit of fossilized fecal mass this morning, it split away revealing what might be a feather. I wet a bit of downy feather and photographed it for comparison. What do you all think? @Carl, didn't you have a coprolite with a feather inclusion? If so, did it look like this? The bone that I exposed is very furrowed and hollow. Of course this may not mean anything other than it is partially digested. Could it be a bird bone? @Auspex Here is the before and after photo of the coprolite fragment. Here is a magnified image of the a wet modern feather and the possible undigested feather.
  10. Since I couldn't go out to dig for fossils, I decided to go on a micro dig. Today's dig was in a coprolite fragment from the Oligocene. Prior to excavation, the broken face of the coprolite looked like this. You can see a little bit of bone peeking through. After about an hour of excavation under 40X magnification, I uncovered what I think is a rodent tooth and possibly a toe bone and claw??? What do you think? Does anyone out there know their Rupelian rodents? Grinding Surface of the tooth: Side view showing roots: Small toe bone and claw or an fractured toe/foot bone? Is fossil poop cool or what???
  11. I found this tortoise on my sons’ M&M Ranch in Nebraska. It is a Stylemys nebrascensis tortoise from the Oligocene Brule Formation. It is a monster, 23"x17.5"x8" around 150 pounds in weight. It has minimal restoration. I actually found this tortoise in May 2016. You can check out the below TFF post to see it being dug out. http://www.thefossilforum.com/index.php?/topic/65393-oligocene-tortoise-from-the-mm-ranch-in-crawford-nebraska/& Because of the size, our normal prepper wouldn’t originally prep this tortoise. So my sons brought it back to Virginia and my older son did the gross prep by removing most of the matrix leaving only what was sticking to the shell. He reduced a lot of the original jacketed weight. My older son then convinced our normal prepper to do the fine prep. My sons drove the tortoise back out to South Dakota where our prepper finished it. My older son will bring it back to Virginia next Spring, four years after I originally found it. Here are some pictures. The back legs are really cool and usually don’t survive. The only thing that I’m a little disappointed about is the color. There were two exploded black tortoises very close to this one so I was hoping for the rare black color. The tan/brown color is nicer than the more common white color but it isn’t as nice as the black color. Marco Sr.
  12. Hi all, trying to get some id help with some teeth from the Brule Formation, Nebraska. Most i think are oreodont, mesohippus and similar. Unfortunately dentition is not my forte, so any assistance would be appreciated. Tried to take photos from three different angles to help. Set 1, 2-specimens Set 2, 3-specimens (lower 2 mesohippus maybe) Set 3, 2-specimens Set 4, 1-specimen Set 5, 1-specimen (mesohippus maybe?) Thanks for everyone's help again. MUCH appreciated, Paul
  13. Merycoidodon culbertsoni?

    Hello fossil friends, Picked this beauty up recently, but I was told no more than "Oredont from Wyoming". From this, I deduce Merycoidodon culbertsoni, from the Brule Formation. Is this correct? All responses are appreciated Thank you!
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