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Naze Dave
That dramatic decrease in the cross section area of the whorls would suggest Nautilus to me.
thanks
Dave
Still Life
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sal7373
Hi all,
I found this in a rock on Monmouth Beach last week and was wondering if it was a fossil? It was quite large the right hand side was the size of a watermelon.

 

Cheers

Sal

 

whatsthis3.JPG 
Loves school holidays - cus every day can be a fossil day :-)
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ThomasM
Looks like an ammonite or nautilus in cross section.
Thomas

If you don't look, you won't find.
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TqB

Looks like a section through a nautilus.

Tarquin
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quagga
Hi Sal, looks interesting, almost like a slice through an ammonite/nautilus.
Al

Time is nature's way of stopping everything happening at once.
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ThomasM
If you look carefully I think you can see the remains of the siphuncle to the left, so that would make it nautilus.
Thomas

If you don't look, you won't find.
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mudbug2
Hi Sal
 Can't see anything at the moment, would appear to be the crystals, fools gold etc, thats abundant on the Jurassic Coast..

 

Regards to all who share the passion Mudbug...
S.H.T-N
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TqB

 The shape of the whorl section,  the siphuncle position (near central) and apparently simple chamber walls all say nautilus.

Tarquin
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rockhopper
I wont say, I'm always getting em mixed up..... lol

Its a cephalopod cross section for sure though!


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Bugg
im going with nautilus 

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