Manticocerasman Posted January 13, 2022 Share Posted January 13, 2022 On our last fieldtrip to France this weekend we found a chalk-boulder with a quite large ammonite in it. The chalk was realy hard, but I was able to reduce it in size to take it back home. At the start of the prep with chislle and hammer I got a lucky split where the boulder opened to reveal most of the ammonite. The airscribe then did a quick job to remove the last bits. Sadly the center of the ammonite wasn't preserved, I tried to sculpt the center as well as I could and coloured it to match the fossil. As for the determination we had a little doubt between Cunningtoniceras inerme and Acanthoceras rothomagense as both species can look a lot alike and this specimen was slightly deformed in the chalk whitch made determination a bit harder, but most of the sings point towards A. rhotomagense .( the whorls here being higher than wide ) As found: the end result: A. rhotomagense mid. Cenomanian Cap-Blanc-Nez ( France ) 3 14 growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted January 13, 2022 Share Posted January 13, 2022 Great preparation and beautiful specimen! Well-spotted too, as I don't think I would've just yet! 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...
Huntonia Posted January 13, 2022 Share Posted January 13, 2022 Gorgeous! 1 Link to comment Share on other sites More sharing options...
caterpillar Posted January 13, 2022 Share Posted January 13, 2022 Good job. Bravo! 1 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Ludwigia Posted January 13, 2022 Share Posted January 13, 2022 Good job! 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
FossilDAWG Posted January 13, 2022 Share Posted January 13, 2022 Nicely done! I can't really tell that the initial whorls are restored. You must have an amazing collection with all the excellent ammonites you have been showing us. Don 1 Link to comment Share on other sites More sharing options...
facehugger Posted January 13, 2022 Share Posted January 13, 2022 Awesome. Great work & great eye!!! 1 Link to comment Share on other sites More sharing options...
Sjfriend Posted January 14, 2022 Share Posted January 14, 2022 Great job cleaning it up! That ammonite looks awesome. 1 Link to comment Share on other sites More sharing options...
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