PaleoOrdo Posted November 13, 2020 Share Posted November 13, 2020 I cannot figure out what is this fossil. Can anyone help me for ID? I found it in an area in Norway in the Oslo field, ordovicium or silur area. Could it be a part of sea-lily? Link to comment Share on other sites More sharing options...
Rockwood Posted November 13, 2020 Share Posted November 13, 2020 Someone may, but I can't improve on cystoid. Link to comment Share on other sites More sharing options...
Al Dente Posted November 13, 2020 Share Posted November 13, 2020 It might be a crinoid lobolith. 5 Link to comment Share on other sites More sharing options...
abyssunder Posted November 13, 2020 Share Posted November 13, 2020 (edited) Lobolith was my first impression, but the adjacent bulbs of Loboliths have spherical geometry, not conical like it's visible in the specimen in question. I don't think we have a crinoid floating organ here. Edited November 13, 2020 by abyssunder 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Rockwood Posted November 13, 2020 Share Posted November 13, 2020 9 minutes ago, abyssunder said: conical like it's visible in the specimen in question. Like would be most evident (or not) in the one angle that is not well represented ? Link to comment Share on other sites More sharing options...
abyssunder Posted November 13, 2020 Share Posted November 13, 2020 6 minutes ago, Rockwood said: Like would be most evident (or not) in the one angle that is not well represented ? " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
PaleoOrdo Posted November 14, 2020 Author Share Posted November 14, 2020 Thank you all for your viewpoints. I agree that it seems to be a crinoid lobolith. On the other hand: 8 hours ago, abyssunder said: he adjacent bulbs of Loboliths have spherical geometry, not conical like it's visible in the specimen in question Do you refer by "bulbs" to the small circles in picture 2 or to the whole figure or lobolith? What is the functions of these smaller circles? Some kind of "anchors"? Could it be an Scyphocrinid? I am doubtful of that. Acccoring to an article I found online ( http://www.mprinstitute.org/vaclav/Scyphocrinites.htm ) "Scyphocrinitid crinoids occur almost worldwide in the Siluro-Devonian boundary formations in Europe, Asia, North Africa and North America. They are the only crinoids in the history of the class bearing a special organ for buoyancy, so-called lobolith." (Meaning that the only loboliths which have existed are scyphocrinids?) I believe the site is much earlier than this age, according to the geological map of NGU. If so, and if it is a lobolith, then it must be an interesting find? Morover, about the shape: Two different types of loboliths are now known: the subspherical, orange-shaped, cirrus lobolith with numerous chambers of unequal size and the lobed plate lobolith with a few large chambers, a curved, bilaterally symmetric root trunk, a simplified wall structure, and a characteristic collar. So, it seems, it is a lobe plate lobolith? 1 Link to comment Share on other sites More sharing options...
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