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Hi all

I’ve been picking through a stream in Cambridgeshire and found a few unknown items which I need help with.

I’ve found the below which makes me think fish jawbone? Can anyone help identify what it is? There is a weathered layer which I’m able to take off, I’ve exposed a bit of it. 
07E47B47-E7CD-4ACF-B689-6AF5A07C3BA9.jpeg  3C099386-E2EC-466F-B1EE-DD2587B4ADFB.jpeg 

I finally managed to find an Ammonite (not the best quality) but up to now it’s only been segments. I did find a few segments still with its Mother of Pearl and I’ve been looking for a whole one ever since, no luck on this front.


 Lastly there’s this stone which once I cleaned up looks like petrified bark. Might not be, but there’s a love bronze streak in it which I want to expose. Any tips for cleaning and exposing?

as always thanks for any help 🙂

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Hello, this jaw is probably from a fox; clearly mammalian and to many elements in the jaw to be from a cat...
Further an ammonite and a piece of fossil wood.
Nice finds!

greets, Bert
the search is as valuable as the finds...
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Thanks Bert, 

I wasn’t sure about the jaw bone, the fossils app indicated it’s more likely to find a tooth or spine section for fish...

See photo below of the ammonite segment with the mother of Pearl still on it. I’m going back again and again to find a whole ammonite like this. 

9F4901AD-C1AC-420D-A7A7-3817FC47564E.jpeg  11DEA788-9146-452E-81BE-42E1EFBC2BBE.jpeg 

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Barrow Museum
I know it's only a small fragment, but I am thinking the last fragment of ammonite, with the nacreaous shell attached, is a fragment of Amoeboceras, which is a common element of the derived fossil fauna in the glacial till in Cambridgeshire southwards to the maximum extent of the Anglian ice sheet in Buckinghamshire.  The preservation and carinate keel (like the keel of a boat) would be typical of this genus.  They occur in nodules, sometimes nearly 30cm across, in the Ampthill Clay, which is just below the Kimmeridge Clay (your usual finds!) and above the Oxford Clay and West Walton Formation.  Persevere and you will find a complete one I am sure. The black ammonite must remain unidentified for the moment.  If you can provide a picture that shows its cross-section, that might give the game away.

I agree that the other piece must be petrified wood (or less likely a fossil bone fragment).  Again, there's not enough evidence from the photo to be sure.
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