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Conwy Rhyolite
This stone is older than it looks. Send it to someone five minutes away.
Just found Conwy Rhyolite in Town Walls.
Caradoc, Ordovician rhyolitic ash, quarried at Bodlondeb & Conwy Mountain, Cony, Gwynedd, North Wales. Nearest stop: Conwy.
This stone is older than it looks — worth five minutes if you're nearby.
https://www.londonpavementgeology.co.uk/location/3468-town-walls/
The closest other recorded buildings.
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