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  1. Picked this up a while ago. Finally prepping. Slow going as it's in some very hard sediment. Saw some teeth pop out today.
  2. Found this fun fossil in the green river formation near Spanish Fork UT! Would love some input on what it may be
  3. 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. Whatever left this Coprolite behind may have been carnivorous. This leads me to my question. Is there any way to tell what animal left this coprolite? If so, what animal left it behind? Any help will be appreciated, Jared
  4. 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, 83:1-140 In addition to piranha, I need to thank a “to remain nameless” forum member who directed me to the site. I also stopped at Florissant for a short time, which contains many similar if not identical species at its location. So, my finds are a mixture of the two sites, but mostly Green River. To begin my journey, I exited the highway onto what was thought to be the proper road. It seemed more like an abandon trail, but the landmark mentioned was present. It concerned me, with the small low riding rental car being driven, the likelihood of getting stuck existed. Roads like this never stopped me before, so off I went. And besides, it is a rental car!!!! Looking at my directions, it instructed me to turn right at the next “dinosaur”. What a unique instruction. I couldn’t wait to see what was ahead. After seemingly hours, traveling under 10 mph, seeing nothing but expanses of sagebrush reaching to the horizon, I finally reached my next turnoff. And yes there it was, the dinosaur, clear as day (mixed in with a little pareidolia) soaking up the warmth of the morning sun. After turning right and many more rough miles of travel, I finally reached this isolated spot of Green River Formation. It is the light-colored rock in the foreground. The beauty of the Utah landscape overwhelmed my senses and I just sat on the rim of the canyon taking it all in. It is moments like this that keep me “fossil hunting”. My mind, body and spirit were united as one! Enough of this meditation stuff. You want to see fossils!! First up are the possible insects found. Again, pareidolia may be part of what I am seeing so forgive me if some are misidentified as insects. My readings told of seeds frequently encountered in the Green River. These pictures depict what I believe are seed like structures. Possibly Somara ailanthus: A legume pod?? Next are unknowns to me. They appear to be coniferous. The next specimen was tentatively IDed as a coniferous leafy shoot. But in the book that I attempted to make my IDs from, the tip of a fern, Asplenium delicatula looked very similar. Woody pieces are found on occasion. The first one pictured matches Equisetum winchesteri closely. The next two are unknowns that I keep seeing as flowers. Hopefully not more pareidolia. An odd trace fossil. Now I will show samples of the Green River leaves found. I was unprepared for splitting this matrix. My lowly bon big face Estwing brick hammer could not peel up large enough slabs of matrix, resulting in many partial leaves like these. Be prepared for the need of multiple small chisels and pry bars if better specimens are wanted. The first leaf is similar to Quercus petros. The next leaf is suggestive of a legume. Finally Eugenia americana?? Next are a few Florissant leaves. The middle one possibly Populus heeri. Next up is Astronium truncatum. Notice the matrix is NOT flat and the leaf conforms to the undulations. This is common with leaves from Florissant. Dinner time!! I will finish this post when my after dinner nap concludes!
  5. 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 or if its more likely to be nothing of interest. Having fun so far!! Thanks for any feedback
  6. 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 be something!
  7. 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
  8. 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.
  9. 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 things right if it can't be stabilized, so at least there's that. Any suggestions/info that can be gained from these photos?
  10. 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!
  11. 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 petrified wood--this came from the same group that sold me the fake shrimp. All help is appreciated.
  12. 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
  13. 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 for †A. messelensis sp. nov. (Table 182). (C) Differs from †A. messelensis sp. nov. in having a shorter premaxilla relative to head length (Table 180). (D) Differs from †A. messelensis sp. nov. in having a shorter head relative to standard length (Table 180). (E) differs from A. spatula and A. tristoechus in that the dermosphenotic forms part of the orbital margin as in A. tropicus." Line drawing from Grande 2010, p. 475 : Identified by oilshale. References: Grande, L. (2001) An Updated Review of the Fish Faunas From the Green River Formation, the World’s Most Productive Freshwater Lagerstätten. Eocene Biodiversity, 1–38. doi:10.1007/978-1-4615-1271-4_1 . Grande, L., Kammerer, Ch. & Westneat, M. (2006) Comparative and Developmental Functional Morphology of the Jaws of Living and Fossil Gars. // Journal of Morphology, Vol 267, Issue 9, 1017-1031. Grande, L. (2010) An Empirical Synthetic Pattern Study of Gars (Lepisosteiformes) and closely related Species, based mostly on Skeletal Anatomy. The Resurrection of Holostei.// Copeia, 2010, No 2A, 1-863.
  14. I found this rock near Green River Utah, east of the San Rafael Swell. Can anyone help me identify it?
  15. 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.
  16. 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 possible to identify the exact species? I ask because I am getting ready to frame and label it. If the exact species cannot be figured out, that’s okay. I’ll find out how to label it. Any help will be appreciated, Jared
  17. 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
  18. 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 thousands of specimens to choose from. See for yourself. These broken cheapos can be terrific! The entire fossil
  19. 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. How should I pack the fossils to protect them? Any other info/advise will also be gratefully thanked.
  20. Lmshoemaker

    Help with green river fish.

    Hello! When I bought my air abrasive a year ago the guy that I bought it from gave me a bunch of unprepped green river fish as he was retiring. One issue that seems to commonly come up is that no matter how low I set my psi or how slow I go on some fish the "skin" seems to pit and develop holes. Is there any way to avoid this? I've gone down to as low as 1-3psi with dolomite and this still happens. I've noticed that it tends to happen on disarticulated specimens mostly, and part of me feels this is more of a preservation issue than anything. The guy I got my abrasive from also included paint I'm assuming for this very reason, but I want to use it as sparingly as possible.
  21. 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 Water bird tracks (possibly sandpipers or plovers) Presbyorniformipes feduccii Vernal, Utah Bird feather Aves indet. Southwest Wyoming Crane flies & Mosquitoes Pronophlebia rediviva & Culex sp. Parachute Creek Member; Douglas Pass, Colorado
  22. Hi everyone, I made a discovery of a Knightia on August 12th, 2021 at the green river formation in Wyoming. Today, I noticed something VERY interesting. Pictures are attached, one under a high power magnifier. As you can see, this Knightia did NOT get fossilized on its side. On the contrary, it is almost a top-down view of the fish. You can see one whole eye socket, as well as a part of the other, you can see where the spine attaches to the skull, the ribs go both ways, the tail is top down, the list goes on. It even looks like there are 2 nostrils, but this I am not sure about. The skull looks REALLY weird with an almost top-down view! Brings a lot of questions to my mind. Anyway, What do you guys see in this fossil that is interesting? I am open to any ideas that will help me study it. Time to study this fossil more! Jared
  23. jnicholes

    Weird Coprolite ID

    So, I was going through my fossils from my last trip to Kemmerer Wyoming. One of them accidentally split, revealing this. It looks like a kind of Coprolite, but I’m not sure. It’s got scales in it, but it’s too flat to be regular Coprolite. I suspect it is stingray Coprolite, as the people there told us to watch out for it, because they have been finding a lot. Can someone help me ID this? Jared
  24. After my first glimpse of The Lost World of Fossil Lake by Lance Grande (if you don’t have it, get it at any price!), I was hooked on Green River fossils. Here is the first one I prepared myself. I bought it directly from one of several “storied” Wyoming quarries. It is from the 18-inch layer and is not found by splitting the fish but by detecting the raised surface of the skull and vertebrae. Then one must somehow scrape away the relatively soft matrix to expose the fossil below (perhaps 1 to 5mm deep). The tools I used are pine vises that held sewing needles. If I could safely scrape away layers, I used an eyeglass screwdriver in the pin vise, but pins work for precise work. I visualized the fossil as I worked with a stereoscopic microscope on a boom so it can hover over the fossil without touching it. Here is the progression of pictures I took back in 2017. This is a 4.75 inch Cockerellites liops. I am told in the quarry they are called “footballs”, are beautiful fish armed with strong spines to prevent predator attack from behind. It took me about two months on and off- it is seriously laborious but somewhat calming or maybe even meditative. After months with a fossil like this, you become attached to it. Before starting If anyone knows how to do this more quickly with the same or better quality, please comment.
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