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Keith Lamb
Found this afternoon but struggling to id it. I’m relatively new to this but hope someone can help. Cheers in advance.
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Barrow Museum
Ammonite, probably upper Jurassic.  To me, it most resembles Pectinatites from the upper part of the Kimmeridge Clay Formation, particularly one of the finely-ribbed species in the Pectinatus Zone.  There's Kimmeridge Clay cropping out to the north and probably offshore too, which was incorporated into the glacial till, from which your specimen came.  Most is now covered by till and vegetation, but there's a very small coastal outcrop accessible at Reighton, Yorks, with similar, slightly older varieties.

Have a look at this one from the Kimmeridge type locality:
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