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Can anyone give a view on the two attached photos of a rock on East Runton beach?

I wonder if they show a trace fossil and, if so, what might have left the impression behind?

Thanks for any thoughts offered,

Alan Click image for larger version - Name: DSC_5417.jpg, Views: 29, Size: 375.27 KB Click image for larger version - Name: DSC_5429.jpg, Views: 29, Size: 385.46 KB
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Hi Alan

These are known as banded flints & are not fossils

I reckon every one gets caught out with these once or twice especially as they can often resemble various real fossils.  

Its not known for certain how these formed but possibly has something to do with changing pressures during the flints early formation within the chalk.

An interesting find all the same.

Have attached a photo of a few that i have picked up from the Thanet area in Kent. 


Keith banded flints.jpg 

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Thank you, Keith. I'm embarrassed to say I do have some very much smaller banded flints similar to yours. It simply hadn't occurred to me that I was looking at one on a vastly bigger scale!

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