How did the Pompeii victims turn to stone?
They didn’t. The famous images of the Pompeii victims show plaster casts of the bodies’ imprints in the ashes. The deceased were burried by ash, which lithified (becoming solid rock) before the corpses decayed. The bodies then disappeared, leaving a hole behind. Filling these ‘molds’ with plaster produced the amazing ‘statues’ of the humans and animals that died.