Search the Community
Showing results for tags 'green river fm'.
Found 20 results
-
Can someone recommend a repair for this specimen? It's a 16" Mioplosus I picked up early eighties in Ulrichs Gallery basement. I prepped it and attached it to a 3/4" plywood base but it cracked a few years back. The crack in the bottom left side isn't bad in the pic but it doesn't look great live. I have been trying to match up putty but can't seem to get it right. Any suggestions? Thanks. Mioplosus .pdf
-
Juvenile Priscacara can be easily distinguished from juvenile Hypsacantha by their distinctly rounder body shape. Grande distinguishes two forms of Hypsiprisca: Hypsiprisca hypsacantha (originally described by Cope in 1886 under the name Priscacara hypsacantha) and a second yet undescribed, closely related form Hypsiprisca sp. H. sp. is more common than H. hypsacantha: H. sp. are mostly very small individuals less than 60mm long. Quotation L. Grande (2013): "The second species that remains undescribed differs from H. hypsacantha in being more slender-bodied and having a more convex posterior tail fin margin (H. hypsacantha has a very slightly forked tail margin)." References: Whitlock, J. (2010). Phylogenetic relationships of the Eocene percomorph fishes †Priscacara and †Mioplosus Journal of Vertebrate Paleontology Volume 30 – Issue 4, pages 1037-1048. Grande, L. T. (2013). The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
-
- 2
-
-
- eocene
- green river fm
- (and 5 more)
-
A juvenile Prisacara serrata (the length is about 2.5 cm), but already showing the typical roundish body proportions of an adult Priscacara and differing from Hypsiprisca sp. Distinguishing characters for Priscacara serrata and Cockerellites liops (old name Priscacara liops): References: Cope. E. D. (1877). A contribution to the knowledge of the ichthyological fauna of the Green River shales. Bulletin of the United States Geological and Geographical Survey 3(4):807-819 WHITLOCK, J. A. (2010). PHYLOGENETIC RELATIONSHIPS OF THE EOCENE PERCOMORPH FISHES †PRISCACARA AND †MIOPLOSUS. Journal of Vertebrate Paleontology, 30(4), 1037–1048. http://www.jstor.org/stable/40864383. Grande, L. T (2013) The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
-
- 1
-
-
- eocene
- green river fm
- (and 5 more)
-
I just bought this green river fish and couln't figure out what species it was. It also looks like it is preserved from the bottom of the fish instead of the side.
-
Hello, I wanted to share my progress on this green river fm. Diplomystus dentatus that I've been working on prepping. It's my first attempt at fossil prep and I've just been using the tool provided by the prep kit, which is a blunt needle-like thing. I'm finding it quite enjoyable even though it's taking a while and my hands/fingers ache after a couple hours from all the pressure! I'm also really learning a lot about a fossil that I didn't really pay attention to previously. So far I've roughly uncovered most of the body, and I've ordered some modeling knives to do some finer prep, especially around the head which I found flakes VERY easily. If anyone has any other suggestions I would like to hear them. Also, if I were to get more involved in fossil prep, what would be next? Would I get an air scribe? What sorts of unprepped material should I work on and where can I get it?
- 17 replies
-
- 7
-
-
- diplomystus
- green river fm
- (and 1 more)
-
Hello, I recently got this unprepped Green River Fm. fossil fish to dip my toes in fossil prep, and was told it would be either a Knightia or Diplomystus. Is it identifiable at this point? I'm thinking it more resembles Diplomystus, despite the head being a bit crushed. This how it was unprepped: And here it is currently, about 8hrs prep using a blunt needle-like tool.
-
I was surprised to learn that turritellia(elimia) agate comes from the Green River fm. It seems surprising that such radically different matrices are present in the same formation. Does anyone know the association, are there clumps of agate mixed in with green river fish/leaves/etc or are they isolated deposits that got lumped in together due to similar age and location? *edit*: Also, Eden valley wood/algae and giant stromatolites. Truly a diverse formation
-
Disarticulated GRF fish. Not sure what species. Has these armor plates on back with teeth on them. Any ideas? Prepping it, got skull exposed.
- 7 replies
-
- 3
-
-
- fish
- green river fm
- (and 1 more)
-
Hello, Is this a Knightia eocaena? It's from the Green River Fm. of Wyoming, USA, and measures ~8.5 cm long. Thanks.
-
Hi everyone, I acquired this fish about a year ago and was told there was no repair/restoration/funny business. Showed to a friend who agreed. Recently showed it to another friend who said it looked funny. Now after taking a closer look I'm having doubts especially with the teeth which look painted. Showed it to a third friend who said the teeth sometimes look like that. It's a big fish, about 13 inches that I IDed as Phareodus encaustus. What do you all think?
-
Hello all, Need help ID this insect larva from the Eocene Green River Formation of Colorado. It's 1.5cm long, about 2cm if outstretched. As far as I can tell it has a series of large, bulbous protrusions spiraling along the length of its body, and one end has a sharp taper/point, though I'm not sure if that's the head or tail end. It has a very distinctive look so I feel like it would be recognizable if it's something that's been described before. Any help appreciated, thanks.
- 6 replies
-
- 2
-
-
- colorado
- green river fm
- (and 2 more)
-
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
-
I have recently recived a fossil fish (Probably a knightia) from the Green River formation. I am inexperienced with these fossils and have no idea how to prepare them. If someone could give me advice it would be greatly appreciated. The Fossil Outline My tools (The tool on the left is an electric engraver with air scribe tips, I have 2 fine tips and 1 chisel tip)
-
Green River Fish Fossil for Dinosaur Fossils
Nanotyrannus35 posted a topic in Member-to-Member Fossil Trades
So this is my 1st time on the trade forum, so I hope I'm doing it right. I have this partial green river formation Eohiodon fish that is about 6 inches long that I self-collected from the split fish layer and I would like to trade it for dinosaur fossils. The fossils that I would want would be tyrannosaur teeth partials, and fossils from the Hell Creek and Judith River formations. Here are the pictures of the fish.
-
I have been trying to find a few oz. of vican. I can't find it anywhere, is there something else I can use and where to find it? Thanks Dave
-
Phareodus Encaustus with Aspiration (Notogoneus?) from Green River Formation
DC-FL-DC posted a topic in General Fossil Discussion
Wanted to show this phareodus encaustus prior to preparation that my daughter found during our Father's Day night dig in the 18" layer in the Green River Formation in Kemmerer, WY. The team with us, and some experts looking at it after, now suspect that it is aspirated, perhaps with a notogoneus. Having it examined by xray prior to preparation as we may end donating this one to Fossil Butte Monument if it is what it looks like. Phareodus is every bit of 24" in length or longer. The best Father's Day gift was the sheer joy of my 9 year-old daughter upon her discovery. We love searching together.
- 7 replies
-
- 9
-
-
-
- aspiration
- green river fm
- (and 2 more)
-
I got back from Kemmerer with a dozen fish fossils from the Ulrich quarry. I have not been able to find a reference book to describe field marks for identification. I would appreciate any suggestions. Thanks in advance.
-
Starting to prepare specimens from Green River Fm Split Fish Layer. Several are quite thick - up to 2-inches. I would like to split them further but the pieces seem a lot harder than when collected. Presuming this is because they are much dryer (collected in early June, rock still very moist). Questions: 1) Is the dryer rock likely to split less cleanly than it did when moist? 2) Will re-hydrating* the rock make them easier to split cleanly? 3) Even if it does, is re-hydration likely to loosen the fossil on the upper surface of the rock? I could just experiment but would hate to loose a good specimen in the process. Thanks for any help. *I could re-hydrate by submerging in water but that seems most likely to damage the fossil. The first approach I would try is to support the slab over water in a closed plastic containers. Placed in the sun, the high humidity should re-hydrate the rock fairly quickly. Any other re-hydration ideas are most welcome.
-
The information on Asineops is scarce so I thought I'd do some research and make it publicly available. Asineops squamifrons is a Eocene fish and an incertae sedis. They are rare and are most commonly found in a fragile layer of the green river formation at smith hollow quarry. They can be found in fossil lake or lake gosiute. Fossil lake ones are bigger but rarer. I don't know the maximum size on these but I would guess 7-12 inches. Their scales a very distinctive in shape. According to Rosen and Patterson (1969) it may represent a intermediate between acanthopterygians and paracanthopterygians (which looking at a phylogenetic chart is confusing to me) , meaning their closest living relatives would be the troutperch and its allies (percopsiformes). Its relations to other fish are confusing and not understood but it bears some affinity to Nardoichthys (a Italian late Cretaceous fish which seems to be closely related to troutperchess) and prolates (couldn't find much info on this guy). Diagnostic features include the following: long premaxillary ascending process six branchiostegals unforked caudal fin with 14 principal rays (12 branched) cycloid scales full nueral spine on PU2 two epurals free second ural centrum two anal spines two supranuerals unserrated preopercular Pelvis girdle and cleithrum do not touch unfused lower hypurals sources: Wikipedia Enigmatic fish Oilshales topic @FossilDudeCO Fossil lake Specimens from top to bottom: @oilshale Fossil lake If you have anything to add, or a specimen to show off, I encourage you to do so! Thanks for reading!
- 1 reply
-
- 1
-
-
- asineops
- description
- (and 3 more)
-
From the album: BONES
Family PRISCACARIDAE of Eocene freshwater boney fish. This example, at about 7.25", is about average adult size. The largest reported is about 15" long. The name translates to "serrated primitive head." (This image is best viewed by clicking on the "options" button on the upper right of this page => "view all sizes" => "large".)© Harry Pristis 2012
