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Harry_
Hi all. I have just joined the forum so sorry if I get anything wrong! This fossil is a (I think) Cretoxyrhina shark tooth embedded in a giant ammonite. I found this on Hunstanton cliffs and it is from the Cretaceous deposit of the ferriby chalk formation. I have heard that these kinds of fossil records about prehistoric shark's diets were reasonably rare and can be of scientific interest. I was going to contact the natural history museum of Oxford if it is but couldn't find out how to so I decided to come to you guys first. The tooth is 1cm in length and the ammonite is 38 cm (15 inches). Click image for larger version - Name: IMG_20200726_144450.jpg, Views: 29, Size: 371.40 KB Click image for larger version - Name: IMG_20200726_144514.jpg, Views: 30, Size: 455.93 KB Click image for larger version - Name: IMG_20200726_144521.jpg, Views: 31, Size: 394.38 KB Click image for larger version - Name: IMG_20200726_144953.jpg, Views: 28, Size: 394.83 KB Click image for larger version - Name: IMG_20200726_145210.jpg, Views: 27, Size: 372.30 KB Click image for larger version - Name: 15957722441941139175255035680976.jpg, Views: 27, Size: 64.43 KB
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Dirty Pete
Hi Harry,
Doesn't seem to have sparked much scientific interest so far............All I'd say is that there doesn't seem to be much left of the ammonite other than a vague circular shape. As there seems to be no shell/outer surface with a corresponding puncture mark I reckon you'd be hard pushed to prove predation. 

Pete.
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Harry_
Yes that's what I had feared, as the part of the ammonite where the tooth was is completely gone. Thanks for taking a look though
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