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Karen-Kraz

Hi there, 

My Dad found this fossil in his garden in Stockton (nr Rugby) and gave it to my daughter. We have no clue what we are looking at but we are very interested. Please could somebody be kind enough to give their opinion on what it may be? 

Are they teeth?

kind regards 

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MartynH
Hi, that looks to me like a fragment of an ammonite, so sorry they are not teeth. If you have a look on line at images of ammonites you will see some of them have these knobs on them.
Martyn H
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Karen-Kraz
Thank you for taking the time to reply. If nothing else it’ll give my daughter something to research into during lockdown. 
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Karen-Kraz
Thank you for taking the time to reply. At least it will give my daughter something to research during lock down. 
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prep01
Yes, this is a very worn mould of a partial ammonite.
Colin Huller
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Barrow Museum
Agree it's ammonite.  It would benefit from some cleaning, to reveal more of the ornamentation.  As it's from near Rugby, where the Lower Jurassic "Blue Lias" is dug for cement-making, I am tempted to say it is an example of Euagassiceras, or Microderoceras or something closely related.  Several of these ammonite genera in the Sinemurian Stage (the second stage of the Jurassic System) develop such tubercles along the shoulder of the whorls, such as on yours.  Send the photos to the curator in Warwick Museum, where they have a good collection of these..  I am sure he could help.
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