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aquigley770

help me identify this fossil?

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aquigley770

Hi all, I recently found this on a trip to the Jurassic Coast at Dorset and have been intrigued by this find, i'm not an expert on fossil identification and i would be grateful for all your potential ideas as to what this could be.

IMG_4220[1].JPG

IMG_4215[1].JPG

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WhodamanHD

I still say belemnite, guard not phragmacone. Some are partially hollow.

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TqB

Which end of the Jurassic Coast and what size is it? An end view of the wide end would be useful too. 

It doesn't look like a belemnite, especially not any of the Lias belemnites from the Lyme/Charmouth area. 

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aquigley770
1 hour ago, TqB said:

Which end of the Jurassic Coast and what size is it? An end view of the wide end would be useful too. 

It doesn't look like a belemnite, especially not any of the Lias belemnites from the Lyme/Charmouth area. 

It was found at Kimmeridge, approximately 4cm in length with a piece broken off the narrow end it also has a slight curvature to it, I’ll post a picture from that perspective for you soon, I appreciate it guys! 

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aquigley770

Here are some extra photographs

IMG_4233[1].JPG

IMG_4235[1].JPG

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TqB

Thanks, those are helpful. 

 

I'm not sure but it could be the end of a Pinna - type bivalve. (Look up "Pinna fossil" otherwise you get lots of ears... :) )

 

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aquigley770

Yes I can see why you’ve made that comparison, an interesting suggestion thank you! 

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FossilDAWG

I'm in agreement with Pinna.

 

Don

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abyssunder

I also agree with Tarquin. Pinna (if not quite that) - like bivalve would be a good possibility. As far as I can see, the celluloprismatic layer structure, in the transverse view of the specimen, is visible. (It will be nice to see a polished transverse cut in high-resolution, for further reference.)

 

59cb9c02e0399_IMG_42331.JPG.a079212c3fc3d08faaa0b1a7eebe3388.thumb.JPG.498b66c449e92840e4be6adfefa8571f.JPG59cbffe94d4aa_Figure1.thumb.jpg.21075cdd057d21dab8b67a48d89c5bad.jpg

excerpt from J.-P. Cuif et al. 2012. Layered Growth and Crystallization in Calcareous Biominerals: Impact of Structural and Chemical Evidence on Two Major Concepts in Invertebrate Biomineralization Studies. Minerals 2(1): 11-39.

open access

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Darko

Nice find :)

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aquigley770
20 minutes ago, abyssunder said:

I also agree with Tarquin. Pinna (if not quite that) - like bivalve would be a good possibility. As far as I can see, the celluloprismatic layer structure, in the transverse view of the specimen, is visible. (It will be nice to see a polished transverse cut in high-resolution, for further reference.)

 

59cb9c02e0399_IMG_42331.JPG.a079212c3fc3d08faaa0b1a7eebe3388.thumb.JPG.498b66c449e92840e4be6adfefa8571f.JPG59cbffe94d4aa_Figure1.thumb.jpg.21075cdd057d21dab8b67a48d89c5bad.jpg

excerpt from J.-P. Cuif et al. 2012. Layered Growth and Crystallization in Calcareous Biominerals: Impact of Structural and Chemical Evidence on Two Major Concepts in Invertebrate Biomineralization Studies. Minerals 2(1): 11-39.

open access

Fantastic information this is very much appreciated my friend! :)

11 minutes ago, Darko said:

Nice find :)

Thanks @Darko I’ll be sure to keep posting further finds in the future! 

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