Moughton Whetstone is a type of siltstone with remarkable colour banding.
The banding was formed by the rhythmic precipitation of hematite as water percolated through the rock over millenia.
The iron diffused through the porous rock in pulses or waves creating distinct bands aka ‘Liesegang rings’.
The rock dates to the Silurian period.
Used once for sharpening razors, hence the name.
