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This is a re-post of a topic I started late this last summer, but got lost during the August forum migration. Late in July I took a trip with a few friends out to the American Fossil Quarry and Fossil Butte National Monument to hunt for fossils out of the lower Eocene Green River Formation. The Green River Formation is a lagerstatte which is perhaps the best site in the world for articulated fossil fish, many of which also display varying degrees of soft tissue preservation. Fossils from this locality are mined commercially and are ubiquitous on the fossil market. Living in Denver, the Green River Formation is only a few hours away by car and I've always wanted to plan a trip out there to collect it, which is very easy to do and fairly cost-effective thanks to numerous pay-to-dig quarries where you get to keep essentially everything you find. I decided to plan a dig at American Fossil Quarry, which is one of the more popular quarries. I managed to convince two of my friends to come with me, and we spent a day and a half (12 hours total) at the quarry while camping at the nearby Lake Viva Naughton. It was my two friends' first times ever hunting for fossils, and they both report that their expectations were far exceeded at the quarry! There's a very good chance this trip was the start of the making of two new fossil fanatics. We had a blast out in the quarry, with the thrill of discovery doing plenty to stave off the oppressive sun and desiccating dust. We also made sure to visit some of the fossil shops located in Kemmerer and spent some time at the museum in the visitor's center of Fossil Butte National Monument, which is fantastically well put together and was so awesome to see. Each of us found plenty of treasures, including lots of Knightia and Diplomystus fish as well as coprolites (fish, stingray, and turtle), scales, occasional plant material, and even a few rarer fish. Here's some pictures from our adventure: Myself posing with a very nicely preserved Knightia eocena. My two friends hard at work splitting shale for ancient treasures. A few of my day one finds on my shelf. A very nice partial Priscacara found by one of my friends. A small stingray with associated Knightia found by a different participant the first day we were there. A mostly complete Amphiplaga brachyptera (one of the rarer fish) found by me, associated with a Knighta alta. Only the tail and part of the dorsal fin is missing, the rest of the fish is intact! Easily my prettiest fish: An absolutely perfect Diplomystus dentatus found by me the second day. One of the displays at the visitor's center of Fossil Butte National Monument. Cheers, and thanks for reading!
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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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Hey Gang, Was going thru another box and found a small piece that I acquired awhile back that I dont have a name for and looking for some help....if anyone has any ideas...much appreciated... Did some preliminary review of some of the Eocene pubs but nothing screamed yep thats it... From a quarry near Fossil Lake, Kemmerer, Wyoming. Green River Formation. Got some interesting fish bits in the plate as well... @piranha Thanks! Regards, Chris
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Mammoth Trackways Found at Fossil Lake, Lake County, Oregon
Oxytropidoceras posted a topic in Fossil News
Mammoth steps found at Fossil Lake Ancient trackways discovered in Lake County By Kurt Liedtyke, Herald and News, Oregon https://www.heraldandnews.com/news/local_news/mammoth-steps-found-at-fossil-lake/article_72c659d4-38f6-545f-b7a2-5718be8c4d51.html Rare Mammoth Tracks Reveal an Intimate Portrait of Herd Life Researchers piece together a 43,000-years-old tableau of an injured adult and concerned young, Smithsonian Magazine https://www.smithsonianmag.com/science-nature/rare-mammoth-tracks-paint-intimate-portrait-pachyderm-group-life-180968256/ Retallack, G.J., Martin, J.E., Broz, A.P., Breithaupt, B.H., Matthews, N.A. and Walton, D.P., 2018. Late Pleistocene mammoth trackway from Fossil Lake, Oregon. Palaeogeography, Palaeoclimatology, Palaeoecology.https://doi.org/10.1016/j.palaeo.2018.01.037 https://www.sciencedirect.com/science/article/pii/S0031018217312154 Yours, Paul H.- 2 replies
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Priscacara Serrata is one of several species of recognized in the Green River formation. It is less common that its relative the Priacacara Liops.
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Amphiplaga is one of the rarer of the Green River fish fossils, making up some 1% of the total from Fossil Lake, its only known location. Amphiplaga belongs to the family Percopsidae within the order Percopsiformes. The Order Percopsiformes is a small order of North American freshwater fishes that includes three families: Amblyopsidae (cavefishes); Aphredoderidae (pirate perches); and Percopsidae (trout-perches). Closely related to neither trout nor perch, trout-perches have characteristics of both the trout and perch families. They exhibit characters of the salmonids, such as an adipose fin, cycloid scales, and soft fin rays, as well as characters of the percids, such as dorsal and anal fin spines, and ctenoid scales. Trout-perch are generally silvery in appearance, often with a partially transparent appearance, and relatively large heads and eyes. They are small fish with weak fin spines, and an adipose fin similar to those of trouts. Amphiplaga grew to as much as 150 mm. long; the average length was 100 mm. They feed on insects and small crustaceans. Fossil percopsids are only known from North America, the current home of the extant genus Percopsis. References: Grande, L. (1984): PALEONTOLOGY OF THE GREEN RIVER FORMATION, WITH A REVIEW OF THE FISH FAUNA. THE GEOLOGICAL SURVEY OF WYOMING, BULLETIN 63
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This amazing shrimp is from my quarry in the Green River Formation near Kemmerer Wyoming. This fossil was found in 2015.
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