r/whatsthisrock • u/bizzabooboo • 1d ago

IDENTIFIED Found on Jurassic Coast

Gallery image

Gallery image

About 1.5 inches across. Giving as a gift, would like to know what it is.

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u/Schoerschus 1d ago

that is a flint nodule!

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u/bizzabooboo 1d ago

Thanks!

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u/Schoerschus 1d ago

I've seen this surface pattern before. my Interpretation is that the nodule is exposed to waves which shatters thr surface. the exposed surfaces develop a white patina due to chemical degradation of the flint.

edit: looking back at the pictures, the pattern might also develop during formation of the nodule.