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Showing results for tags 'green river formation'.
Found 93 results
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Cool Priscacarid from Green River Formation -- 4 anal spines and 11 dorsal spines
ahlung62 posted a topic in Member Collections
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. -
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.
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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.
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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.
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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 picture on FossilsForSale.com that is pretty much identical, and is listed as a crocodile.
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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 to start on the most exposed part of the backbone, and move up from there, saving the delicate fins for last. I have already tried out the tools on a few coprolites and vertebra on the rock. What advice do you have for this prep to be as successful as possible? @RJB @Ptychodus04 ? Thanks!
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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 for future growth of my needs, or for example a 27 gallon is all that I would ever need running 1 tool at a time. I very much appreciate any input!
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What do you guys think of these four knightia fish?
RepoMan9130 posted a topic in General Fossil Discussion
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. -
16cm long, looks like some kind of Nightia nut I am not sure.
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From the album Green River Formation
Priscicara serrata from the Green River Formation. Air abrasion performed by @Ptychodus04 -
Looking for recommendations on 1 air tool to buy for softish shales and limestone
mattbsharks posted a topic in Fossil Preparation
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. -
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.
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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.
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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.
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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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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.
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High schooler unearths giant gar skull (Wyoming, Green River Formation)
Oxytropidoceras posted a topic in Fossil News
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.- 1 reply
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Ammonites, Trilobites, Fossil Fish: Another Western Adventure
Jeffrey P posted a topic in Fossil Hunting Trips
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: -
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
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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?
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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.
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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.
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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.
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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
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