ADfossils Posted August 1 Share Posted August 1 Hello (again) everyone! Here is another bone from the Kimmeridgian of the Boulonnais region (North of France). It measures just over 20 cm (8 inch) in lenght. At first, I thought it was a thick piece of rib from a bony fish (doesn’t match the cut shape of plesio, ichthyo or croc rib). Then, while preparing it, this « back » part seemed different to the rest of the bone being thin. It almost looks as if there are muscle attachments. Obviously, I am hoping that this might be a piece of jaw. For now I only did carefull manual prep on it. I am waiting for the paraloid to dry to give it a quick vinegar bath and try removing some more matrix with an air scribe. Has anyone got any clue? Thank you very much! Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted August 1 Share Posted August 1 Interesting piece, but don't have a clue as to what this might be. Seeing size, thickness and how straight the bit of bone is, however, I suspect that a piece of jaw isn't too far off... Nice one! 😁 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
rocket Posted August 1 Share Posted August 1 great find. hard or impossible to say where it belongs to. Might be a rib..., but Go to dig the skull! 1 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted August 1 Share Posted August 1 2 minutes ago, rocket said: great find. hard or impossible to say where it belongs to. Might be a rib..., but Go to dig the skull! Actually, yeah, considering the hand for scale, I agree, this could also be a rib. Fits the cross-section quite nicely... 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
ADfossils Posted August 6 Author Share Posted August 6 Hello again! Here is an update. It still needs some prep and it is all shiny with the extra coats of paraloid, but the shape is already a bit more there. Sadly it looks like the bone was crushed prior to fossilization: 2 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted August 10 Share Posted August 10 Sorry, no ideas as to what this could be, though a section of mandible comes to mind as these are usually straight, can include thickening, and consist of multiple bones, making them more prone to breakage. This particular piece reminds me of the surangular/dentary-joint a bit 🤔 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
sjaak Posted August 19 Share Posted August 19 I think rib or piece of mandible. These eroded fragments can be quite impossible…. 1 Link to comment Share on other sites More sharing options...
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