Osteodontokeratic Posted June 14, 2019 Share Posted June 14, 2019 Hello fellow TFF Members Does anyone have any idea what this might be? Found it, and another one very similar, in the Creede Formation of Creede, Colorado. Sorry that I did not put in a scale; it is approx. 3" in diameter. The center circle has radiating lines. From that circle there are several concentric rings. From what I have read, the site was a salty lake formed in the Creede Caldera. Most of the fossils are plants and the sediment is fine grained volcanic ash. Almost looks like a jellyfish to me. Any I.D. will be much appreciated. I am stumped. Thanks, ODK Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 14, 2019 Share Posted June 14, 2019 Looks like a concretion, with some breakage spalling on the top to me. Are Jellyfish known from that formation? 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted June 14, 2019 Share Posted June 14, 2019 No, it's lacustrine, a caldera lake deposit, I think, plants and insects, mostly. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Osteodontokeratic Posted June 14, 2019 Author Share Posted June 14, 2019 Hi Tim, Not of which I am aware. I just attached the second one. ODK Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 14, 2019 Share Posted June 14, 2019 The concentric layers are diagnostic to concretions/nodules. Sometimes, nodules/concretions can contain fossils. You might try the freeze/thaw method, or whacking (Carefully) on the side with a hammer. Search the Forum for Freeze/Thaw method. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Osteodontokeratic Posted June 14, 2019 Author Share Posted June 14, 2019 Thanks Fossildude, I have used freeze thaw on Mason Creek siderite nodules. The Creede specimens are not actually nodules. They are relatively thin. More like impressions of a module than a nodule itself. Bummed that they are not biogenetic. But still cool. Link to comment Share on other sites More sharing options...
Rockwood Posted June 14, 2019 Share Posted June 14, 2019 1 hour ago, Osteodontokeratic said: Bummed that they are not biogenetic. If it were to be caused by a methane eruption that might be considered biogenic in a way. It happens. Link to comment Share on other sites More sharing options...
SailingAlongToo Posted June 14, 2019 Share Posted June 14, 2019 3 hours ago, Fossildude19 said: The concentric layers are diagnostic to concretions/nodules. Sometimes, nodules/concretions can contain fossils. You might try the freeze/thaw method, or whacking (Carefully) on the side with a hammer. Search the Forum for Freeze/Thaw method. "Whacking" = technical term for bludgeoning with a solid object. I love whacking things!! Don't know much about history Don't know much biology Don't know much about science books......... Sam Cooke - (What A) Wonderful World Link to comment Share on other sites More sharing options...
Osteodontokeratic Posted June 14, 2019 Author Share Posted June 14, 2019 Oligocene bovines? Link to comment Share on other sites More sharing options...
Rockwood Posted June 14, 2019 Share Posted June 14, 2019 Cow pie ! Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 14, 2019 Share Posted June 14, 2019 3 hours ago, Osteodontokeratic said: Thanks Fossildude, I have used freeze thaw on Mason Creek siderite nodules. The Creede specimens are not actually nodules. They are relatively thin. More like impressions of a module than a nodule itself. Bummed that they are not biogenetic. But still cool. They could be termed lens, in this case. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
ynot Posted June 15, 2019 Share Posted June 15, 2019 Wondering if it could be some type of algal growth. Would like to see a side view. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Osteodontokeratic Posted June 20, 2019 Author Share Posted June 20, 2019 Will see if I can get a side photo. Will not be till next week though. Link to comment Share on other sites More sharing options...
ynot Posted June 21, 2019 Share Posted June 21, 2019 On 6/20/2019 at 1:56 PM, Osteodontokeratic said: Will see if I can get a side photo. Will not be till next week though. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Osteodontokeratic Posted June 26, 2019 Author Share Posted June 26, 2019 I took a photo of the side of each specimen and the back of the larger one. The back of the smaller one was similar. ODK Link to comment Share on other sites More sharing options...
ynot Posted June 27, 2019 Share Posted June 27, 2019 Seams to be restricted to the one layer, so not a concretion structure or gas escape feature. Jelly fish or algae is looking more likely to Me. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Rockwood Posted June 27, 2019 Share Posted June 27, 2019 3 hours ago, ynot said: Seams to be restricted to the one layer, so not a concretion structure or gas escape feature. You mean these never just stop, or have their surface erode as they are covered ? I would think it most common. Link to comment Share on other sites More sharing options...
Osteodontokeratic Posted June 27, 2019 Author Share Posted June 27, 2019 They remain an enigma to me. I was struck by the radial symmetry similarity between the two. Link to comment Share on other sites More sharing options...
Randyw Posted June 27, 2019 Share Posted June 27, 2019 18 minutes ago, Osteodontokeratic said: They remain an enigma to me. I was struck by the radial symmetry similarity between the two. I’ve been going through my fossil books and online off and on since you first posted these and the closest things I have found that looks like them are jellyfish. But the location argues against it. But if it was from a location where they were known I’d have put money on The jellyfish ID. But I agree I love the look of them! Link to comment Share on other sites More sharing options...
Osteodontokeratic Posted June 27, 2019 Author Share Posted June 27, 2019 Jellyfish was my first thought, especially after learning that there are fresh water jellyfish, but now am at a total loss as to what they might be. Link to comment Share on other sites More sharing options...
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