Plinian eruption
Mount Tlaloc is an eroded stratovolcano and the oldest and northernmost volcano in a volcanic chain extending south to Popocatépetl. Volcanism at Tlaloc initiated during the Pliocene, with volcanic activity continuing until the Late Pleistocene. A major Plinian eruption about 31,500 years ago produced pyroclastic flows and a major pyroclastic fall deposit composed of pumice.