The enigmatic structure is indicated by the yellow arrows (look at the photo). The scale bar is in centimetres. I'm not sure what it could be. It was found in carbonate sediments of Upper Jurassic from the Carpathian Foreland of Southern Poland. Thanks!
They look like sections across micromorphic gastropods. See the external ornament and the whorl structure of those in the lower cluster. Tim
Thank you for your answer. My first idea was that it could be any kind of gastropods, but the main part of the shell is dissolved and probably recrystallized.
thank you very much .A.
They look like bigger vadose ooids - vadoids to me... Especially when considering the cavities which they are close to or connected to.
Thank you for your suggestion. I'm not sure, because this part of profile is the uppermost part of the organic buildup (bioherm).
It looks like Gastropods recorded within carbonate shallow marine environments (lagoonal or back-reef )
We can also see some fenestrae/birdseyes !!! stromatactis!!! attesting of arerial exposition!!!!
Thank you for your suggestion, it's very helpful. It's absolutely shallow marine conditions. Maybe do you have any suggestion what kind of gastropods group it could be?
Sorry, I'm not an invertebrate expert either, I am paleobotanist.
But are not possible to be longitudinal/transversal sections of milliolid foraminifer tests or carapaces?
Thank you for your suggestion but I suppose that it seems to be rather too big for Milliolid foraminifer (about 4 to 5 cm). Thanks for your help.
oh! yes! untill 2 cm I think it is possible, but not for this size. Sorry!
