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  1. The Green River Formation is one of the most well-known fossil sites in the world, occupying present-day Colorado, Utah and Wyoming. This Lagerstätte has been noted for its well-preserved fish fossils, as well as numerous invertebrates, plants, and sometimes even reptiles and birds. Green River fossils are Eocene-aged, at 53.5 to 48.5 million years old. Thankfully, not only are Green River fossils attractive, they also remain affordable to the casual collector. Allow me to present my humble collection. Crocodile tooth Borealosuchus sp. Southwest Wyoming
  2. The holotype is a fantastic specimen, which is illustrated. Paleontologists Find Frog-Legged Beetle Fossil in Colorado Sci News, Aug 10, 2021 The paper is: Frank-Thorsten Krell & Francesco Vitali. Attenborough’s beauty: exceptional pattern preservation in a frog-legged leaf beetle from the Eocene Green River Formation, Colorado (Coleoptera, Chrysomelidae, Sagrinae). Papers in Palaeontology, published online August 5, 2021; doi: 10.1002/spp2.1398 Yours, Paul H.
  3. UW’s Vietti Leads Student Expedition into Four Kemmerer Fossil Fish Quarries By Aaronm Brown Wyoming News Now, August 111, 2021 UW’s expedition into four Kemmerer fossil fish quarries to air on PBS Rocket Miner, August 11, 2021 UW’s Vietti Leads Student Expedition into Four Kemmerer Fossil Fish Quarries University of Wyoming Yours, Paul H,
  4. Fossilis Willis

    good times in the badlands

    Earlier this month @JD3B and I went a incredible fossil hunting road trip. The title may be a bit misleading, as only one day was actually spent in the badlands. There were however, plenty of good times. We were lucky to have the opportunity to visit a few storied formations, and even luckier to have a couple tff legends to guide us. The first morning was an early one with a 3:00 am wake up. I was at Jacob's (JD3B) by 4:00 and on the road before 5:00. First stop, the Helena, Montana area to visit the world renowned @RJB museum of natural history. We arrived late in the afternoon an
  5. Top Trilo

    Fish prep

    Finished this fish yesterday, preservation wasn’t terrible. The head Isn’t preserved well and neither is the tips of the fins but anything is better than my first prep which was on an exploded knightia. Could of turned out better but I’m satisfied with it. I have a couple questions. 1. can you tell if it is a priscacara or a cockerellites? I believe they are two different genera with different species. 2. What is the part in front of the fish’s head? It’s not bone, it’s very thin and different, I have no idea what it is. Oh and I was prepping with a not so sharp needle
  6. Crankyjob21

    Green river formation fish

    Got a sweet slab of green river fish today but I’m not sure on what type of fish they are, I’m pretty sure ones a knightia, but could someone give me an ID on the others
  7. Fossildude19

    Diplomystus dentatus

    From the album: Fossildude's Purchased/Gift Fossils

    A beautiful Diplomystus dentatus from the Green River Formation, Wyoming. This was a gift from my entirely too generous, good friend, Jeffrey P.

    © 2021 T.Jones

  8. Fossildude19

    Mioplosus labracoides

    From the album: Fossildude's Purchased/Gift Fossils

    Mioplosus labracoides from the Green River Formation. No provenance on location, unfortunately. Inexpensive auction find.

    © 2021 Tim Jones

  9. Just recently added a really cool specimen to our Leeward Community College Natural History Exhibit. It is a Priscacarid from the GRF with 4 anal spines and 11 dorsal spines. The specimen is just shy of 8 inches and very well prepared. I have emailed Lance Grande, the author of "The Lost World of Fossil Lake" for his opinion on this specimen and is awaiting his reply. Has anyone seen or know of other specimens similar to this? Your feedback is greatly appreciated. Thank you very much.
  10. yardrockpaleo

    Fish coprolite?

    Hello everybody, Asking about a certain fish fossil I received from a friend who found it at the Green River Formation. Under one of the fish, there is a sort of long, tapering, uh, feces-looking squiggle. (Trying to be mature here!) I want to know is it a fish coprolite, a mineral deposit, or something else? If I didn't know better I'd suspect it was the entrails of the fish. Anyone out there who can help? I've also attached some pics of other suspicious discolored spots that may help.
  11. I recently purchased a Priscacara specimen with what appears to be four anal spines. In his book "The Lost World of Fossil Lake", Lance Grande mentioned that there is a possible new species with four anal spines and an elongate body. I am including a couple of photos and would like feedback as to whether this is truly a Priscacara with four anal spines; and if so, what is the status of this being describe as a new species or just a mutation. Your comments and feedback will be greatly appreciated. Thank you for your time.
  12. I just finished prepping my first large Diplo and wanted some input and suggestions from the community. I did it with pin vices and magnifying headset.
  13. Brian Magnier

    Fossil tooth - Green River Formation, WY

    I found this tooth while prepping some of my fossils from the American Fossil quarry near Kemmerer, WY. This is actually in the same plate as a partial stingray that I've been trying to piece back together! I didn't even know the tooth was there until today, weeks after our trip to the quarry! It is very hard, shiny, and completely 3-dimensional. Has some ridges running longitudinally from the base (visible in picture), but these fade out and the top half is very smooth. No serrations. 1cm long, 2-3mm wide. Some quick googling makes me think Crocodile Tooth - there is a
  14. Fossildude19

    Close up of Gosiutichthys parvus

    From the album: Fossildude's Purchased/Gift Fossils

    Close up of individual Gosiutichthys parvus on the multi specimen plate. Middle Eocene, Green River Formation. Wyoming.

    © © 2018 T. Jones

  15. Looking for some assistance and guidance. I have spent countless hours reading posts about fossil preparation and specifically about fish prep. The knowledge shared here is humbling to say the least. So here goes: If your end goal is to be able to do all the things necessary for 18" layer Green River material, split fish Green River material, Hell Creek material; how big of a compressor should I start thinking is overkill? The smallest capacity I've considered is 20 gallons, the largest 80. I'm just wondering what people are using in terms of capacity and if I'm better off going bigger f
  16. Thecosmilia Trichitoma

    First Fossil Prep

    I got two unprepared GRF fossil fish, a Knightia and a Priscacara as presents for my birthday, in a kit that also contained a small handheld needle-like tool. I would like to get some advice from the experienced members of this forum on how to proceed. For tools, I have a sewing needle, x-acto knife (with parental permission,) and the tool that came with the kit. I have a slides microscope that can focus well enough for a prep in order to have some magnification. I have Lance Grande's book on the GRF for anatomy, and have read all of the prep threads I could find on this forum. I have decided
  17. blackmoth

    green river fish fossil Knightia?

    16cm long, looks like some kind of Nightia nut I am not sure.
  18. I am new to fossil collecting and paleontology in general. I wasn't sure if these are real, as it's almost unbelievable to me that I can buy such things for so cheap, but apparently the seller is highly regarded. I was under the impression that finding multiple things fossilized together is quite rare? Either way, I impulse bought this, along with some spinosaur teeth. What do you guys think? These knightia are from the Green River Formation in Wyoming, and according to the site, the largest fish is 3.1 inches. Any thoughts, impressions, or random information would be appreciated.
  19. Fossil-Hound

    Priscicara serrata

    From the album: Green River Formation

    Priscicara serrata from the Green River Formation. Air abrasion performed by @Ptychodus04
  20. I am looking to spend around $250-350 total on an air compressor and one air tool well equipped to prep both green river formation limestone and softish shales like penn Dixie/dsr. I understand that no one tool would be perfect for that, but I want to find one that can do both jobs solidly.
  21. Ptychodus04

    Green River Trip

    I just returned from 4 days of digging in the Green River Formation. The quarry we dug in has 18”, mini fish, and upper gastropod layers currently exposed. Coming from Texas, we anticipated cooler temps but it was downright cold. High temps in the 40s and 50s with lows as cold as 30F! We had 1 day that was an almost total rain out but we dug 3 days and 2 nights on the 18” layer. We dug every day in the mini fish layer and randomly picked up pieces from the Upper Gastropod layer. On the second to last night, we went to bed in pouring rain and awoke at 3:00 AM to the tent collapsed o
  22. Barely a month had gone by since my last trip to New Mexico and Colorado, but I already had plans for this trip in the works. Primary focus this time, which was a solo trip, was fossil collecting, visiting well known sites that have been on my radar for quite some time. I flew out to Salt Lake City and drove directly to Kemmerer, WY. My first stop there was Fossil Butte National Monument: Here is a view of the visitors center (free admission) and the surrounding barren, but awesome landscape that surrounds it:
  23. dorkasaurus

    Fish scale or something else?

    I found what looks to be a large fish scale, but I’m not entirely certain. I would like some help with potentially ID’ing the species. I tried searching online, but nothing I found looked like what I collected. This was collected from the split fish layer of the Green River Formation at American Fossil Quarry in Kemmerer, Wyoming. It is about 1.5cm in length and width. Thanks for any help.
  24. Jeffrey P

    Douglas Pass, Colorado Finds

    My partner and I visited Douglas Pass, Colorado last August: Eocene, Green River Formation, Parachute Member. The site represents a very shallow lake bed and is known primarily for fossil plants and insects. Recently I unwrapped her finds. The first one I think is some type of fossil seed. It is about a half inch long. The second, I think is a partial insect larvae, about an 8th of an inch. Let me know what you think. Thanks.
  25. Hi there! Now that Christmas and New Year's are done, I'm trying to continue organizing and labeling my fossils before I head back to work on Monday. I'm hoping I can get some help from you regarding the identities of 2 specimens: Specimen #1: a brachiopod from the Miocene (Burdigalian) of Sesimbra, Portugal: Specimen #2: two fish from the Eocene Green River Formation of Kemmerer, Wyoming: (fish on the left:) (fish on the right:) Thanks in advance for your help! Monica
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