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Scrumpy
Hi
Has anyone got any idea what this is below the ammonite, it’s about 40mm long (maybe more still hidden in matrix) and is smooth to touch. It doesn’t look like any shelf I’ve found before. This was found at Port Mulgrave
Cheers Rob Click image for larger version - Name: 67C9B853-CA5F-4DA8-8389-4E77536E2568.jpeg, Views: 59, Size: 637.12 KB Click image for larger version - Name: 9F9CEA9A-CA9A-4AA9-8B39-78B3D96FC5FA.jpeg, Views: 63, Size: 540.74 KB Click image for larger version - Name: 3496816F-96C2-4BA4-B28E-CAC860CFBCCC.jpeg, Views: 56, Size: 443.79 KB
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Gandalf the White
Probably dactylioceras ammonite.
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Scrumpy
Yes the main ammonite is a Dac, the the other can’t be as it is smooth. I opened up this nodule so it can’t be water worn
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prep01
Hi Scrumpy at a GUESS it's part of a bivalve but it needs prepping to reveal more.
Colin Huller
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estwing
On the last pic you can see a kind of groove across what could be part of the whorl of a Lytoceratid ammonite, although I doubt it; something like Alocolytoceras (here in Italy it is quite common, I don't know about Yorkshire).
Something like this:
[141452114] 
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prep01
Rob - this is a Yorkshire mudstone nodule - NOT a flint - flint is formed in Cretaceous seas enlarge or open in a new tab and enlarge to read  2014+Mortimore+on+Flint.jpg 
Colin Huller
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