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Chris G
I'm not a fossil collector but I do collect fossils. Most end up going to school with my wife (junior teacher) never to return but I don't mind. 
Can you help with these two ammonites. Found just East of St. Catherines light house on the Isle of Wight. Scale is a 10p.

Thanks,

Chris IMG_1974.jpg IMG_1968.jpg IMG_3905.jpg   
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prep01
Hello and welcome to the forum. The top one is Schloenbachia variens (95 - 100 mllion years old) I'm pretty sure, but the other one I think we need more photos especially the edge (keel).
Colin Huller
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Rolo
second specimen looks like Mantelliceras saxbii
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Chris G
Thanks for the welcome. I've told my wife about the site/forum so don't be surprised if youngsters join to tap in to your superb knowledge.
Let me know if you need more pictures but hope this helps. IMG_3903.jpg  IMG_3905.jpg 
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Chris G
Thanks very much for the ID. I've just tried to upload additional pictures of the second one but I think I'm limited as a newbie - so I've tried a workaround which is being approved as we speak.

I've let my wife (teacher) know about the site so don't be surprised if some youngsters make use of your superb knowledge. They have a "fossil man" go in to school each year with loads of fossils and he's always a great hit.
Thanks again,

Chris
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prep01
that fits the slot Rolo
Colin Huller
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Barrow Museum
Matrix on second ammonite looks like Upper Greensand, therefore Albian Stage of the Cretaceous.  I suspect the ammonite is Mortoniceras inflatum. (Mantelliceras has no keel).  Very good, almost complete specimen
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Chris G
Thanks Barrow Museum,

I've had a look at the geological maps of the IoW and the location is described as Gault/Upper Greensand. I live in an upper greensand area (Surrey) and the matrix looks very similar to some of the material extracted locally - unfortunately local fossils are non existent.
Just getting used to ammonite terminology and I wasn't aware they are so extensively classified.
Thanks for the help - ever day's a school day.

Chris
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Rolo
Indeed, agree not Mantelliceras.  I missed seeing the keel.
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