This description is about the catastrophic event that occurred in the ancient Roman city of Pompeii, Italy in 79 AD. On August 24th, Mount Vesuvius erupted, spewing out a deadly mix of ash, pumice, and volcanic gas that buried the city and its inhabitants
From Wikipedia
Pompeii was a city in what is now the municipality of Pompei, near Naples, in the Campania region of Italy. Along with Herculaneum, Stabiae, and many surrounding villas, it was buried under 4 to 6 m of volcanic ash and pumice in the eruption of Mount Vesuvius in 79 AD.