 The former consists of lava flows on the southeastern flank, with dates of 325,000 ± 8,000 and 300,000 ± 100,000 years before present.The Laguna unit again features lava flows but also breccia and pyroclastic material, and one age of 169,000 ± 5,000 was obtained on its rocks.The last unit, Llareta, was erupted by the summit vent which generated lava flows on the northeastern and southwestern sectors of the volcano, plus large pyroclastic bombs.