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Hello everyone, 
I would be grateful if someone could help me figure out what these are. 
They were found in Samphire Hoe, near Dover, South East Kent, in cretaceous chalk. 
Thanks!  Click image for larger version - Name: 20181001_125631.jpg, Views: 33, Size: 2.66 MB Click image for larger version - Name: 20181001_125603.jpg, Views: 35, Size: 2.74 MB Click image for larger version - Name: 20181001_125519.jpg, Views: 35, Size: 4.08 MB Click image for larger version - Name: 20181001_125619.jpg, Views: 36, Size: 2.72 MB
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It's probably oxidised iron pyrites. It might, or might not, be replacing a fossil - picture no. 3 does look a bit sponge-like doesn't it!
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I finally managed to find pics of something similar... And they are indeed peculiar-shaped pyrite nodules. What a disappointment [frown]
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Marcasite actually, the outer part oxidesed to Limonite, but the shapes of the ones in pics 1,2 & 4 are unusual.
Colin Huller
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