Jump to content

Search the Community

Showing results for tags 'green river formation'.

More search options

  • Search By Tags

    Type tags separated by commas.
    Tags should be keywords or key phrases. e.g. carcharodon, pliocene, cypresshead formation, florida.
  • Search By Author

Content Type


  • Fossil Discussion
    • General Fossil Discussion
    • Fossil Hunting Trips
    • Fossil ID
    • Is It Real? How to Recognize Fossil Fabrications
    • Partners in Paleontology - Member Contributions to Science
    • Questions & Answers
    • Fossil of the Month
    • Member Collections
    • A Trip to the Museum
    • Paleo Re-creations
    • Collecting Gear
    • Fossil Preparation
    • Member Fossil Trades Bulletin Board
    • Member-to-Member Fossil Sales
    • Fossil News
  • Gallery
  • Fossil Sites
    • Africa
    • Asia
    • Australia - New Zealand
    • Canada
    • Europe
    • Middle East
    • South America
    • United States
  • Fossil Media
    • Members Websites
    • Fossils On The Web
    • Fossil Photography
    • Fossil Literature
    • Documents


  • Anson's Blog
  • Mudding Around
  • Nicholas' Blog
  • dinosaur50's Blog
  • Traviscounty's Blog
  • Seldom's Blog
  • tracer's tidbits
  • Sacredsin's Blog
  • fossilfacetheprospector's Blog
  • jax world
  • echinoman's Blog
  • Ammonoidea
  • Traviscounty's Blog
  • brsr0131's Blog
  • brsr0131's Blog
  • Adventures with a Paddle
  • Caveat emptor
  • -------
  • Fig Rocks' Blog
  • placoderms
  • mosasaurs
  • ozzyrules244's Blog
  • Sir Knightia's Blog
  • Terry Dactyll's Blog
  • shakinchevy2008's Blog
  • MaHa's Blog
  • Stratio's Blog
  • Phoenixflood's Blog
  • Brett Breakin' Rocks' Blog
  • Seattleguy's Blog
  • jkfoam's Blog
  • Erwan's Blog
  • Erwan's Blog
  • Lindsey's Blog
  • marksfossils' Blog
  • ibanda89's Blog
  • Liberty's Blog
  • Liberty's Blog
  • Back of Beyond
  • St. Johns River Shark Teeth/Florida
  • Ameenah's Blog
  • gordon's Blog
  • West4me's Blog
  • West4me's Blog
  • Pennsylvania Perspectives
  • michigantim's Blog
  • michigantim's Blog
  • lauraharp's Blog
  • lauraharp's Blog
  • micropterus101's Blog
  • micropterus101's Blog
  • GPeach129's Blog
  • nicciann's Blog
  • Olenellus' Blog
  • nicciann's Blog
  • maybe a nest fossil?
  • Deep-Thinker's Blog
  • Deep-Thinker's Blog
  • bear-dog's Blog
  • javidal's Blog
  • Digging America
  • John Sun's Blog
  • John Sun's Blog
  • Ravsiden's Blog
  • Jurassic park
  • The Hunt for Fossils
  • The Fury's Grand Blog
  • julie's ??
  • Hunt'n 'odonts!
  • falcondob's Blog
  • Monkeyfuss' Blog
  • cyndy's Blog
  • pattyf's Blog
  • pattyf's Blog
  • chrisf's Blog
  • chrisf's Blog
  • nola's Blog
  • mercyrcfans88's Blog
  • Emily's PRI Adventure
  • trilobite guy's Blog
  • xenacanthus' Blog
  • barnes' Blog
  • myfossiltrips.blogspot.com
  • HeritageFossils' Blog
  • Fossilefinder's Blog
  • Fossilefinder's Blog
  • Emily's MotE Adventure
  • farfarawy's Blog
  • Microfossil Mania!
  • A Novice Geologist
  • Southern Comfort
  • Eli's Blog
  • andreas' Blog
  • Recent Collecting Trips
  • retired blog
  • Stocksdale's Blog
  • andreas' Blog test
  • fossilman7's Blog
  • Books I have enjoyed
  • Piranha Blog
  • xonenine's blog
  • xonenine's Blog
  • Fossil collecting and SAFETY
  • Detrius
  • pangeaman's Blog
  • pangeaman's Blog
  • pangeaman's Blog
  • Jocky's Blog
  • Jocky's Blog
  • Kehbe's Kwips
  • RomanK's Blog
  • Prehistoric Planet Trilogy
  • mikeymig's Blog
  • Western NY Explorer's Blog
  • Regg Cato's Blog
  • VisionXray23's Blog
  • Carcharodontosaurus' Blog
  • What is the largest dragonfly fossil? What are the top contenders?
  • Hihimanu Hale
  • Test Blog
  • jsnrice's blog
  • Lise MacFadden's Poetry Blog
  • BluffCountryFossils Adventure Blog
  • meadow's Blog
  • Makeing The Unlikley Happen
  • KansasFossilHunter's Blog
  • DarrenElliot's Blog
  • jesus' Blog
  • A Mesozoic Mosaic
  • Dinosaur comic
  • Zookeeperfossils
  • Cameronballislife31's Blog
  • My Blog
  • TomKoss' Blog
  • A guide to calcanea and astragali
  • Group Blog Test
  • Paleo Rantings of a Blockhead
  • Dead Dino is Art
  • The Amber Blog
  • TyrannosaurusRex's Facts
  • PaleoWilliam's Blog
  • The Paleo-Tourist
  • The Community Post
  • Lyndon D Agate Johnson's Blog
  • BRobinson7's Blog
  • Eastern NC Trip Reports
  • Toofuntahh's Blog
  • Pterodactyl's Blog
  • A Beginner's Foray into Fossiling
  • Micropaleontology blog
  • Pondering on Dinosaurs
  • Fossil Preparation Blog
  • On Dinosaurs and Media
  • cheney416's fossil story
  • jpc
  • Red-Headed Red-Neck Rock-Hound w/ My Trusty HellHound Cerberus
  • Red Headed
  • Paleo-Profiles
  • Walt's Blog
  • Between A Rock And A Hard Place
  • Rudist digging at "Point 25", St. Bartholomä, Styria, Austria (Campanian, Gosau-group)
  • Prognathodon saturator 101


  • Calendar


  • Annelids
  • Arthropods
    • Crustaceans
    • Insects
    • Trilobites
    • Other Arthropods
  • Brachiopods
  • Cnidarians (Corals, Jellyfish, Conulariids )
    • Corals
    • Jellyfish, Conulariids, etc.
  • Echinoderms
    • Crinoids & Blastoids
    • Echinoids
    • Other Echinoderms
    • Starfish and Brittlestars
  • Forams
  • Graptolites
  • Molluscs
    • Bivalves
    • Cephalopods (Ammonites, Belemnites, Nautiloids)
    • Gastropods
    • Other Molluscs
  • Sponges
  • Bryozoans
  • Other Invertebrates
  • Ichnofossils
  • Plants
  • Chordata
    • Amphibians & Reptiles
    • Birds
    • Dinosaurs
    • Fishes
    • Mammals
    • Sharks & Rays
    • Other Chordates
  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

Found 84 results

  1. Priscicara serrata

    From the album Green River Formation

    Priscicara serrata from the Green River Formation. Air abrasion performed by @Ptychodus04
  2. 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.
  3. 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 on us due to heavy, wet snow! Everyone started pushing the snow off and the tent popped back up. Needless to say, we didn’t sleep much that night because we were now soaking wet and had to keep knocking snow off the tent. That was rather exciting g for Texans in July! Here’s our own little corner of the world. This pad of 18” layer produced some really nice fish, leaves, and a feather. Digging at night was a great experience, even though it was COLD!!!!! All in, we had a great time and I have piles of fish to prep now! More to come as I get specimens sorted and prepped. This was the view from the quarry after we finished digging on the last night of our trip around 1:30 AM.
  4. 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.
  5. 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.
  6. 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
  7. I just acquired a GRF fish plate with a Knightia, two Diplomystus, and an interesting ventrally compressed (?) fish. Any help with identifying this fish would be greatly appreciated. Thanks in advance.
  8. Fish story for the ages: High schooler unearths rare fossil by University of Chicago, September 30, 2019 https://news.uchicago.edu/story/fish-story-ages-high-schooler-unearths-rare-fossil https://phys.org/news/2019-09-fish-story-ages-high-schooler.html Yours, Paul H.
  9. 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:
  10. Ricky’s Field Museum prep

    Hey everybody! I realized I never made a thread for my internship at the Field Museum in Chicago this summer. I interned as a fossil preparator under Akiko Shinya in the McDonald’s Fossil Preparation Laboratory (that’s the “fish bowl” lab on the second floor right next to Evolving Planet with the big window). There were some amazing things being prepared in the lab - an Antarctic Lystrosaurus, lots of Dicynodonts, Green River fish (some massive Phareodus), Sauropod femurs and ribs, a massive slab containing several sturgeon and paddlefish - but I’m not sure if I am allowed to post pictures of them, so for the sake of confidentiality I won’t just in case. This is the lab, and I always sat in the red chair, right up next to the window. One of my favorite parts of this internship was seeing all the little kids so excited about what we were doing in there and interacting with them. I was preparing a Priscacara serrata (specimen PF 16961) from the Green River formation of Wyoming, Eocene (~52 mya). All I used was a pin vise and an Amscope stereoscope. This fish also seemed to have slightly “exploded” from the pressure of fossilization as well, it’s jaw was crooked and head smashed, thought most fins seemed surprisingly well intact. The prep took 199.5 hours to complete, from May to August. I finished the prep on the final day of my internship, staying late after the museum had closed to the public and all the others in the lab had gone home. But it was far worth it, because "your name will forever be associated with this specimen." -Akiko Shinya I took a picture at the end of every day and I made a time lapse with it to see the growth! The link is at the bottom of the post. (I kept that floating scale in front of its mouth because I thought it was kind of funny that it looked like the fish was trying to eat it!) You can watch the time lapse Here
  11. Advice on my green river fish

    I have recently bought a fossil fish prep kit,tried to do it and have done for 5 hours,however randomly a small piece falls off and Ive gone as slow as possible is there anything i could do to help?
  12. My girlfriend, Valerie and I planned a two week trip to New Mexico and Colorado to visit friends, see scenery, and attend the Peach Festival in Palisades. Of course fossil collecting would be a part of it. I spent a full day with PFOOLEY outside Albuquerque in the Puerco Valley hunting ammonites in the Carlile Member of the Upper Cretaceous Mancos Shale.
  13. Unknown Green River fish

    When I was preparing this fossil I didn’t 100% know what it was but now am even more confused. The vertebrae’s do not match up with the fossil and the body seems pretty weird to. So if anyone could help me with this fish that would be awesome. And no it’s not a fake a prepared it myself.
  14. The family and just returned from awesome road trip that included a couple days of fossil hunting the Green River Formation at one of the commercial quarries open to the (paying) public near Kemmerer Wyoming. It was our first time and all three of us, especially my four year old daughter, had a great time splitting rock for fish fossils.The first day we spent splitting what the guys at the quarry called "upper layers". The stuff was on the soft side, split easy and had lots of small fish, mostly knights and diplomystus. The second they had us working stuff they referred to as "lower layers". This stuff was relatively harder but had some waves in it that made it much more difficult to split. It seemed worth the extra effort, because although we found less fish overall the second day, they were some bigger fish. I found a mioplosus and 3 phareodus of varying sizes, preservation and completeness, along with a few more little guys.Everything I found was far from perfect, and even my best finds need some work, but we came home with some cool stuff and some awesome family memories I will forever cherish. It was a great trip that was the first of what I suspect will be many out that way. As a side note, while in the area we swung by Lehi, UT to visit the Musuem of Ancient Life. This place was incredible and an absolute highlight of our trip. If you like fossils, and I can only assume you do if you're reading this, this museum will not disappoint. This is the quarry we huntedSome of the knightia and diplosA mostly complete mioplosus that needs a little prep.This phareodus is in pretty bad shape and missing more than half its body, but is big enough to make you get out of the water.Another phareodus, not as big but much better condition.This was my favorite find of the trip. Smaller than the other two phareodus but more complete. After a little repair and prep work this should be a neat fish.
  15. https://www.sciencenews.org/article/50-million-year-old-fossil-captures-swimming-school-fish Avid fisherman here, so this one piqued my interest. Not sure I buy into the collapsing sand dune theory of how the fish were (mostly) preserved in swimming orientation, but I found the repulsion/attraction discussion intriguing as i have seen that behavior by menhadden countless times while fishing in the Atlantic. Its easy to assume extinct animals acted similar to their modern cousins, but rare to see behavioral proof. The abstract for the paper is here: https://royalsocietypublishing.org/doi/10.1098/rspb.2019.0891
  16. Amphiplaga brachyptera COPE, 1877

    From the album Vertebrates

    Amphiplaga brachyptera COPE, 1877 Middle Eocene Kemmerer Wyoming USA Length 8cm
  17. Catfish fossil - Astephus antiquus.

    From the album Fossildude's Purchased/Gift Fossils

    Recent acquisition of mis-identified fossil fish. Listed as Knightia eocaena, I knew the head was the wrong shape. A closer look revealed pectoral spines, and a dorsal spine. I knew then that it was a juvenile catfish. This is most likely an Astephus antiquus. Green River Formation. Length 1- 3/4 inches.

    © © 2019 T. Jones

  18. Knightia and what else?

    This fish fossil is from the Green River Formation, These fossils are enclosed in a thin layer of shale. The vertebrae are 33mm long, possibly Knightia? On the left upper edge of the rock is a fin. I had a x-ray taken and I see several straight pin shaped ribs? However they are a poor match for ribs described in "Paleontology of the Green River Formation, with a review of the fish fauna" (Grande, 1984). These "ribs" are very straight. There is also the central rod-like thing, which is perhaps plant material? I thought a X-ray would review hidden secrets, but it hasn't really adding anything I couldn't see with my naked eye. This forum is a joy to browse. I'm very appreciative of the responses I've gotten from my previously ID requests so far. I am certainly learning! Any ideas as to what I'm seeing?
  19. Eocene Green River Formation ichnofossils

    I would like some help identifying some trace fossils. These are all from the same site from the "Soldier Summit Fossil Track Horizon" area in the Eocene Green River Formation. My grandson and I collected these for his science fair project, so any insight is welcome. Fossil A is obviously a tail feather. It's length is 55mm. Fossil B has shore-bird tracks, but please notice the insect track in the right side. What kind of insect could have made this? Fossil C and D are different sides of the same rock. For side C, I initially thought that this might be bird tracks, but I they don't look anything like the classic pattern in the sample B. Fossil D is covered with fine lines, perhaps some worm tracks? Close-ups E and F zoom in on these tracks. Close-up E shows a mottled pattern on the left, perhaps an alge mat? On the left, a wavy track. I don't know how a worm could create this pattern. Close-up F shows fine lines.
  20. small round balls

    I collected several of these small round balls in limestone (shale?) from the Eocene Green River Formation. The location is Tucker, Spanish Fork Canyon, Utah. The diameter is about 13mm, about the width of my small fingernail. When these are broken open, I see that the sphere is packed with 0.2mm white "crystals". I say "crystals" because they look like calcite to me and some have small (0.05mm) hollow spaces. The crystal density is least in the center of the sphere. FYI, the limestone does show small amounts of black organic fragments. In the field, these look very much like a fossil, but under the microscope, the cross-section looks like it is geological in origin. Any ideas?
  21. Found this 2.5 inch fish earlier this month at a fossil quarry in Kemmerer. I think the dorsal fin structure more closely resembles the relatively rare Hypsiprisca rather than Amphiplaga, but any opinions are welcome. The head preservation is not optimal. I've provided a close-up photo of the lower section of the head, which appears to show sharp teeth.
  22. Quick fish prep

    Quick 18 inch layer prep I just finished. Decided to do this one with a scalpel instead of scribes because some of the fish was pretty flaky and I was afraid that the air from the scribe would blow pieces off even if I was careful with the tip. Being an Amphiplaga I didn't want to risk that. Took about 30 minutes and was a relaxing project.
  23. So I recently bought this fish fossil from an antique shop, supposedly, from the Green River formation in Wyoming. The specimen is about 17 centimeters or 6 inches long, I purchased it because of its relatively low price, but most of all, it's quite large! I'm very limited in knowledge of fish, so I figured I would post it here on the forum, any ideas? I'll also add more photos if needed, thanks in advance.
  24. Dipity-Do Done

    Just finished prepping this great Diplomystus found by a guest at our quarry. It was the first fossil they have ever found so I wanted it to be something special for them. Not much to work with but it turned out pretty good. I used a scribe to clean up the fish a bit, PVA to stabilize the fossil and prevent further flaking, and then had to do some restoration using fossil putty and a bit of touch up paint to restore a few missing areas for them, as they wanted a piece that they could hang on their wall and display.