diaseis Posted May 22 Share Posted May 22 I found a fossil of a kind I've never encountered before. I found it near Bordeaux, in France, in a small river. I can date it from the Aquitanian (Early Miocene) thanks to the geological map. Any idea what this could be ? Link to comment Share on other sites More sharing options...
Collector9658 Posted May 22 Share Posted May 22 (edited) It looks more like a chunk of an ammonite or maybe a bivalve. Edited May 22 by Collector9658 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 23 Share Posted May 23 Cropped and brightened: Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "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...
diaseis Posted May 23 Author Share Posted May 23 @Collector9658So it cannot be an ammonite as this is from the Miocene. As for a bivalve, it is possible but I strongly doubt it. The small semicirculat limit does look as it is part of the fossil, it does not come from a facture from the rock. But I might be wrong ! @Fossildude19 Thanks a lot for the edits ! Link to comment Share on other sites More sharing options...
Rockwood Posted May 23 Share Posted May 23 2 hours ago, diaseis said: The small semicirculat limit does look as it is part of the fossil, it does not come from a facture from the rock. But I might be wrong ! There is commonly a slight halo of mineralization of rock by the shell (bleed off) which surrounds fossils. Shells also have a smooth textured layer on the inside. I think the semicircular feature results from weathering of a fracture. Not something intrinsic to the original shell. Link to comment Share on other sites More sharing options...
diaseis Posted June 6 Author Share Posted June 6 I see, that's very interesting ! Thaks a lot for your insights ! Link to comment Share on other sites More sharing options...
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