Ignimbrite eruptions continued after the formation of the caldera. The Filo Delgado ignimbrite was erupted at some time during the Pliocene from the Huailitas volcano. Its volume is about . 2.4 ± 0.4 million years ago, the Pampa Chamaca ignimbrite filled the moat between the resurgent dome and the caldera rim. The Pampa Chamaca or Talabre ignimbrite was erupted from a vent probably buried beneath the present-day Cordon de Puntas Negras or the Salar de Aguas Calientes and reached a volume of about .