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  1. Here’s a tease of one of my upcoming prep projects. It’s not next in queue but it’s coming soon. I spent some time doing exploratory prep on it for the last couple of days. Anyone know what it is? I’ll give you 2 hints. It’s from the Green River Formation and it’s not a fish.
  2. I think that I posted some pics last year as I worked my way through a prep of a very large Phareaodus fish from the Green River fm near Kemmerer WY. Sadly, its a broken slab and I only have part. I have prepped out to the outer edge but had to stop because that edge is slanted and leaves the fossil layer very thin and fragile. So I came up with an idea. I'll fill in a box of the missing area, finish the prep, and then paint on the missing fish area.. That way I can display it and its still visible for what is real and what it would have been. So, I took a pic and digitally overlaid it o
  3. Ptychodus04

    Croc Paper

    Does anyone have a copy of the paper describing Borealisuchus wilsoni?
  4. Picked this up a while ago. Finally prepping. Slow going as it's in some very hard sediment. Saw some teeth pop out today.
  5. Found this fun fossil in the green river formation near Spanish Fork UT! Would love some input on what it may be
  6. jnicholes

    Coprolite identification

    Hi everyone, I am extremely sick today, so I decided to go through my fossils I found in Wyoming over the years while laying in bed. While going through my fossils, I found a piece of large exposed Coprolite. I thought to myself, “I might as well try to extract it. I’ve got nothing else to do because I’m so sick.“ After about 10 minutes of working with it, I was able to extract it in one piece. Then, it broke in my hand into two pieces. To my surprise, inside the Coprolite where it broke, there were bones. Looks like fish bones. Whate
  7. minnbuckeye

    Round 3 of Western Trip

    The third chapter about my trip out west has been a bit delayed in coming. @piranha graciously referred me to a book on Green River leaves, the main subject of this posting. It was a wonderful book full of beautiful pictures and relevant information on the flora of the Green River Formation. And I immersed myself in it as a way to“semi ID” my finds. For those who are interested: MacGinitieH.D.1969 The Eocene Green River Flora of Northwestern Colorado and Northeastern Utah. University of California Publications in Geological Sciences, 83:
  8. I was tempted recently to pick up a DIY fossil prep kit from an online retailer, have always been curious and wanted to give it a shot. You guys make it seem so easy! I only have manual tools (kit included a metal pick and I've started using a hobby knife to remove some of the upper layers a little faster). The whole slab is approx 17cm and the fish itself is maybe around 11cm. I started this thread to share my progress and get a little feedback. Any tips? Anything I absolutely shouldn't do, or do more of? There is also a big lump visible above the fish, wondering if that is worth digging into
  9. Before I post a trip report, I was hoping to get a few IDs that are giving me some trouble. First up are possible insects. 1. Crane Fly?? 2. positive and negative. Bee?? 3. Has the termite feel!! 4. Another Crane Fly Now what appear to me to be plant oriented material. 5. I am torn between three leaf clover (but how would that end up in a lake), or a flower, or a seed pod cluster. 6. Total unknown 7. Finally this confusing specimen. Great symmetry so must
  10. A few days were spent in the Green River Formation collecting fossil leaves and insects. Now comes the momentous task of identifying my finds. I have piece mealed together some information that has helped a bit. BUT by no means am I happy with my results. Does anyone know of a great guide or article which would help someone like me make proper IDs. Thanks, Mike
  11. GarbanzoBean

    Help with fossil Fish ID

    Is this a Knightia? If so, why does it look like squidward? Im only assuming it's from the Green River because I found it in a box with stuff that is definitely from the Green River.
  12. Another recent acquisition; a beetle of some flavor from Colorado. Good looking piece, both pos/neg are there, but it looks like something flaked off during prep/collection and was put back on. Can anyone tell from these photos if the annotated crack looks stable, or if not, what should I use to shore it up? It won't be handled on a regular basis, but I want to make sure it's not going to fall off on its own. Sorry about the varying lighting; one photo is from the vendor's site, the other was self-shot. I assure you that they're the same specimen. The vendor has agreed to make thin
  13. Bguild

    Flea Market Fish

    Hi gang - My fiancé’s mom came across a fossil fish at a flea market and she ended up getting it. She sent me a picture asking about its species and where it’s from, but I haven’t a clue. Any ideas? Thanks!
  14. oilshale

    Notogoneus osculus Cope, 1885

    Very young fish (27mm) in which the scales have not yet ossified. Juvenile specimens of Diplomystus dentatus can easily be mistaken for juvenile specimens of Notogoneus osculus. But juvenile Notagoneus can be easily recognized by the larger skull and the position of the anal fin, which is set far back. For comparison a specimen of a juvenile Diplomystus dentatus preserved on the same slab: Taxonomy from Fossilworks.org. Revised generic diagnosis from Grande and Grande 2008, p. 10. "†Notogoneus differs from all other genera in the family Gonorynchidae by the fol
  15. Everyone I've encountered on this site has been very helpful, so thank you. However, I'm in need of more help. For the last year I've been collecting real fossils in the field and selling some to pay for more exotic rocks. In a recent post I found that my Solnhofen shrimp is, if not totally, mostly fake. Now I'm quite suspicious of my entire purchased collection and was hoping you could help me identify fakes. The first two pictures are apparently Priscacara, Green River Formation, Eocene; the next two supposedly Asteroidea, Morocco, Ordovician; the last three supposedly Triassic, Arizona petr
  16. Tigereagle12345

    Green River Fish, Knighta or Diplomystus?

    I recently finished preparing a fish fossil from the Green River formation that I purchased online. The site said that the fossil would be either a Knighta or a Diplomystus. From looking at images, the face seemed to look like a Diplomystus but the body seemed more like Knighta. Could anyone tell me which it is? Thanks in advance, Tigereagle12345 Measurements are 11.5 cm by 2.5 cm
  17. Well, I’m finally getting to dig into my truckload of fossils from my Wyoming trip with @RJB so it’s my turn to open up a prep thread. I spent a couple hours today poking around to find the perfect fish to start with. The 18” layer never disappoints. This good sized Diplomystus has 2 Knightia on top of it. I’m going to try to save both but I’m concerned that the right hand one is covering most of the Diplo’s skull. If that’s the case, the little guy will have to go! This is after about 90 minutes of scribe work.
  18. oilshale

    Atractosteus simplex (Leidy, 1873)

    Atractosteus simplex and A. atrox occur mainly in Fossil Lake deposits where they are relatively rare (less than 0.05% of the fish fauna). The long snouted gars are much rarer in Lake Gosiute and Lake Uinta deposits. Taxonomy from Fossilworks.org. Emended species diagnosis from Grande 2010, p. 471: “†Atractosteus simplex differs from other species in the genus by the following characters A-E. (A) Having a lower number of lateral line scales than any other species except for †A. messelensis sp. nov. (Table 184). (B) Having a lower number of abdominal vertebrae than any other species except
  19. I found this rock near Green River Utah, east of the San Rafael Swell. Can anyone help me identify it?
  20. gond

    Knightia eocaena

    Complete specimen of Knightia eocaena. Reference: Lance Grande 1984. "The paleontology of the Green River Formation, with a review of the fish fauna". Wyoming Geological Survey, Bull. 63, pp. 85-86-87 for description of the species, pp 93-95-96-100 for images.
  21. jnicholes

    Green River formation Fossil ID

    On August 12, 2021, I went with my family to a fossil dig in Kemmerer, Wyoming. Two friends from Japan went with us also. We all found a lot of fossils that day. The two friends from Japan even found a small whole Phareodus testis! There was, however, one fossil that was unusual, and we couldn’t get the exact species. Picture is attached. All the people at the quarry said was that it’s a wood imprint, or something like that, I don’t exactly remember. Here is the question. Is this a wood fossil? Second question, if it is wood, is it po
  22. hadrosauridae

    Prepping a Green River Mioplosus

    Welcome to another Fossil Friday! My video today is my first time prepping a fish from the Green River formation, 18-inch layer. This fossil was from recovered from outside of Kemmerer, WY by a friend, @Ptychodus04
  23. I bought this ratty broken split fish several years back at an auction really, really cheap. It was mis-identified as a "Priscacara liops". It was my introduction to Green River fish. This fossil has some revealing details. This is a 7" Priscacara serrata and it displays the characteristic molariform teeth in the pharyngeal region that would normally be hidden in a more intact specimen. This type of tooth is for crushing prey. I would say this broken fellow displays these pharyngeal teeth even more clearly than the picture in Lance Grande's The Lost World of Fossil Lake. And he must have had t
  24. Nipponites

    Green River fm.

    Hello, Next summer I am going to visit Northamerica for my first time, and would really like to visit a Green River commercial quarry; my problems (doubts) are: Which one is the better quarry?, referring to abundance and variety. I live in Spain, and I guess the fossils are too heavy to carry on a plane, so I thought to send them by mail, will I have problems with customs?. In that case, can someone from the quarry provide me a certificate that these fossils have been legally collected? Which messaging company should I use?, preferably a careful one.
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