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Brushed metal plaque № 30569

Hertford, Hertfordshire, England, United Kingdom

Hertfordshire Puddingstone Hertfordshire’s best known claim to geological fame The story of Hertfordshire’s distinctive local stone began at the end of the dinosaur age. A warm sea covered most of Britain. Chalk was deposited on the sea bed and flints later formed in the chalk. These flints became b

each pebbles when the sea, having retreated, reinvaded this area over 50 million years ago. Fine sand filled the spaces between these pebbles, then iron compounds stained the rock to give the colours

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