Gen. et sp. indet. Posted October 26, 2017 Share Posted October 26, 2017 The specimen comes from south-east Poland from Late Cretaceous marls with cherts, rich in sponges and echinoids. It is in a form of a cilinder covered with striae, going through the whole rock piece, which is part marl, and part chert. Is it a fossil? Link to comment Share on other sites More sharing options...
Gen. et sp. indet. Posted October 26, 2017 Author Share Posted October 26, 2017 ... view from above, the cilinder is circular in cross section, on the right you can see a much smaller circle inside the cilinder: view from side, you can see striae on the cilinder in the upper part of the rock... as well as part of the cilinder with striae in the bottom Link to comment Share on other sites More sharing options...
Max-fossils Posted October 26, 2017 Share Posted October 26, 2017 Not seeing anything fossily here... Sorry But Poland is rich in fossils. Keep looking! Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
TqB Posted October 26, 2017 Share Posted October 26, 2017 It might be a slickenside surface formed by the chalk sliding around the chert nodule. Or maybe a stylolite solution feature, something to do with compaction anyway. 1 Tarquin Link to comment Share on other sites More sharing options...
Gen. et sp. indet. Posted October 26, 2017 Author Share Posted October 26, 2017 Thank you I was rather towards it is something abiotic, but couldn't figure out how it might originated or apply any terms, like slickenside. Thanks! Link to comment Share on other sites More sharing options...
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