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Found 238 results

  1. Trace cloven toe half?

    I found this in quaternary alluviums but near a spot with a confirmed vert fossil find. It looks to me like half a cloven toe, but the mineralization seems sketchy. What do you experts think? Could it be a trace, like mud-filled footprint or is it another pseudofossil!? Thanks for humoring me!
  2. I'm curious if anyone recognizes these structures. Found in Denver Basin, near fossil wood deposits. Lattice like structures, almost like giant ommatidia. Maybe a seed? Ticks in blurry scale are mm. Host rock is almost creamy, like chert/opaque agate. Thank you!
  3. Dear Fossil forum members, I have recently acquired this bone. It is said to have been found at Mack, Colorado. I suppose it is from the Morrison Formation. The previous owner thought it might be a Stegosaurus neural arch, but now I have it in my hands I see more similarities with a supraoccipital. Especially these: (Eolambia, A and C) https://peerj.com/articles/1872/ (Fig. 12, A. Eotrachodon) https://www.nature.com/articles/s41598-019-41325-8 (Fig. 2, Q, R, S, T and their other sides, unknown hadosaurs) seem similar to me. That would indicate that my bone is probably Camptosaurus dispar, which is the closest animal to hadrosaurs to live in the Morrison Formation. However, I have not found a good comparison with Camptosaurus, nor any other Morrison Formation dinosaur. In comparison with the supraoccipitals shown above, mine is more than twice the size. Mine is about 12cm, while the other ones I found are 4 to 6 cm according to their scale bars. Is this bone a bit similar in every dinosaur or do I have a really large specimen of Camptosaurus in front of me? I hope someone can help me with this, Thank you very much in advance for your answer, Kind regards, Sander
  4. Back In Time: Fremont County farmer discovered multiple dinosaur fossils in Garden Park https://www.canoncitydailyrecord.com/2020/11/22/back-in-time-fremont-county-farmer-discovered-multiple-dinosaur-fossils-in-garden-park/ https://www.newsbreak.com/news/2107473763723/back-in-time-fremont-county-farmer-discovered-multiple-dinosaur-fossils-in-garden-park Carpenter, K., 2002. Guide to the major dinosaur sites near Cañon City, Colorado. Trilobite Tails, 19(3), pp.7-17. https://www.researchgate.net/publication/314891708_Guide_to_the_major_dinosaur_sites_near_Canon_City_Colorado https://www.researchgate.net/profile/Kenneth_Carpenter3/2 Yours, Paul H.
  5. Petrified Wood Confirmation please

    Pretty sure this is petrified wood can you confirm this. And then the little hole on the one side is deeper than it looks in the picture (about as deep as it is wide) is there anyway to say if this was caused by erosion or from something living before fossilization
  6. Fossil Tooth Tip Restoration?

    Hello, I have a large canine tooth (~14 cm with the root, ~6.5 cm with just the tooth) from the White River Formation that I collected this summer on privately held land in northeastern Colorado, and though the fossil in its natural state is fantastic as-is I’m thinking about doing a little bit of restoration on the fossil and am looking for some insights. The tooth itself is from either an entelodont or the rhino Metamynodon, with the shape of the tooth and root strongly suggesting the latter to me (feel free to speak out if you have an opinion one way or the other, though I’m not specifically asking for an ID in this thread). I found the tooth in several pieces and glued everything that I could find back together. I have most of the tooth, but only a small piece of the tip remains. Also, I have not glued the tooth back to its root, and instead simply display them together as if they were connected. I am thinking about restoring the rest of the tip by sculpting it in using paleosculp from Paleobond, using what piece of the tip there is as a guide. I am looking for any information anyone can give me on paleosculp and the process of restoring a fossil using this material. Would this be the correct product for the job? Is there anything I should know when working with the material? Is restoring the tip of this tooth even a good idea at all, or in the name of science should I leave it as I found it? I intend to leave the paleosculp unpainted for the purposes of not risking damage to the fossil and also making it obvious which pieces of the fossil are original (most of it) and which pieces are restoration (just a little section of the tip). I understand that dinosaur teeth are frequently restored in this way, but I want to make sure that I’m not committing blasphemy by doing such a restoration. Also, paleosculp is advertised as being sand-able and drill-able after it dries, and so I figure if the restoration ever needs to be removed for whatever reason it could be sanded away in a labor-intensive process, but do let me know if this is not the case. I also intend to clean the fossil up a bit more (ie get rid of some of the residual dirt still on it) and potentially glue the tooth onto the root. Thank you for any insights and information you may have! Picture of the fossil and of the tooth tip provided for context.
  7. I found these pieces today, the one on the left is wood but unsure if it is petrified or not, it sinks but that might be because rocks are attached on the other side, I could light it but I’d prefer a safer method. The one on the right is most likely a rock but I find the shape strange like maybe a piece of petrified branch? Thanks for the help
  8. Since I live so close to the famous Morrison Formation I thought I would start doing some research on what it's like to fossil collect in it because I'm seriously considering finding a way to gain access to some private land and do a little bit of collecting. I have heard it said once that the rock of the Morrison is hard and requires special tools to dig in, and that consequently it's impossible to prospect for fossils in the Morrison the same way you would in, say, the Hell Creek Formation. How true is this? Is the only way to fossil collect in the Morrison to be in a quarry? My plan for gaining access to land to collect on is to simply ask landowners if I may fossil collect their in the same way that a hunter might ask a land owner if they can hunt on someone's land. I understand that the more committed of us fossil collectors will do this to gain access to collecting sites, but is there any reason why I should avoid this approach regarding collecting on the Morrison? Thanks for any information anyone has.
  9. Rocks or fossils?

    Hey all, I'm brand brand new to the fossil world. As in, went out to try to find fossils (on a legal collecting site) yesterday for the first time after a bit of reading. I'm in Colorado, and I was looking in an area that is known to have a lot of fossils and there is a lot of erosion exposing different layers. But I really don't know what I'm looking for. I presume all of what I found (or at best, most) is just different coloured rocks (the black spots maybe oxidation from iron content?) but how can I tell fossil from rock? So I thought I'd post some of what caught my attention here and see if anyone can point out to me why these are just rocks and not fossils, if in fact that's the case, so that next time I know to pass them up. (The only one I'm seriously questioning is the small grey one in my hand -- it sort of looks like a fern impression to me? Anyone else see it?).
  10. mancos shale

    Mancos shale outside of Grand Junction Colorado 2 inches in length
  11. Scapula? Other? Pareidolia?

    Over the course of 4 trips to an alluvial outcrop in the Denver CO area I found these fossil-like pieces that ended up fitting together. No idea what it is. Would love expertise opinion. I found a fossilized cochlea near here so think it's a fossiliferous area. Also lots of fossil wood in the patch. Tertiary?
  12. Fossil Bone Fragment ID

    I wanted to see if anyone could tell me what animal this bone may have come from. Probably a shot in the dark for a bone fragment but I thought I'd try anyways. I found this on the shore of a reservoir in Westminster, Colorado which is a suburb of Denver. I've also found petrified wood in the same area. Let me know if any other info would be helpful for an id. Thanks.
  13. "Crocodile" tooth from Morrison Fm

    I buy this tooth from Morrison Formation (Colorado), as a "Goniopholis sp." I think the tooth belong to the family of goniopholididae but not to the genus Goniopholis. The tooth is 0.5 inch.
  14. What dinosaur does this bone belong to?

    Morrison formation, Jurassic period, grand junction Colorado
  15. 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!
  16. White River Formation Carnivore Canine

    Hello! This is a canine tooth (that has been split in half) that I collected from the White River Formation (I believe Poleslide Member of the Brule) from Weld County, CO. I think it is a carnivore’s canine rather than simply an Oreodont canine just due to its size, but I could be wrong there I suppose. My best guess is Daphoeneus or similar due to its shape, it does not look like Hyaenodon to me, but again, could be totally off there. Pictured is the tooth’s lateral surface, interior (because it was split when I found it) and the “cutting surface.” Thanks!
  17. Body Armor?

    Its a solid specimen with interesting internal structure. Does not look like bone. Maybe section of horn sheath or body armor?
  18. Rock or fossil

    I found this probably rock near Estes park Colorado, I’m pretty sure it’s a rock but I thought i would come here and ask just in case, so fossil or not?
  19. Fossil I'd

    Found this and a whole lot more on the property. Can anyone help
  20. Fossil Locations

    I live in Aurora Colorado and was looking for places to go fossil hunting, I’ve already been to Florissant and while it was a great place I also want to look for other locations. I want it to be a 4 hour or less drive which I know really limits the are but I want it to be a day trip not a weekend trip. Dinosaur Colorado and Douglas pass are all far away and I don’t think you can fossil hunt anywhere near dinosaur ridge. I’d be willing to go out of state but only if it’s within 4 hours so like south east Wyoming, south west Nebraska and west Kansas.
  21. 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!
  22. Fremont Butte Co. Maybe more pics

    Hey everyone, Have a buddy who went to Fremont Butte in Colorado. He hauled the picture out. Now, I know you will probably need more pics, any chance it is an egg cluster.
  23. Florissant Fossil Quarry - Colorado

    Well, I'm in my new habitat out here in Colorado, and while I miss dearly a good paddle on the river and my fossil hunts in the mud and sand, I had to make a trip out to our local spot at the Florissant Fossil Quarry. The kids seemed to dig smashing shale (it lasted about an hour), and the technique actually yielded our first decent leaf fossil. The shale smasher .. in disguise !! Dad, wanted to take a lighter approach and we did come home with a large bag of shale and some plant and insect specimens. I'll post some of those in this thread, eventually when I scan them. Splitting the shale you will often come upon Reaaaaly tiny insects that my failing vision has a hard time catching. This winged insect (a mosquito ?!) had bits on each side of the rock so I scanned and composited him in Photoshop. Didn't turn out too bad. I'll let you know what else I find. Raw Scans: Composite: Cheers, Brett
  24. Hello, A colleague of mine shared some pictures of an interesting rock she found. It was found loose by a creek in the Denver area. It looks to me very much like an inner era, although it may well be something else. None of us are able to positively identify it. I'm sure someone here can confirm whether or not it is a fossil, and what it might be. The creek in question flows from the east, and my understanding is it would have to be a tertiary or quaternary fossil if it is indeed a fossil.
  25. Florissant insects.

    Nothing has been said in the Colorado section for almost a year now so lets kick it back up. A little over a week ago I posted some pictures of florissant stuff in the I.D. section. I got a lot of good help and then for the ones we couldn't figure out I tried searching for some that are similar but there's not many different photos online from florissant. I was wondering if anyone could help or if someone knew the florissant formation really well.