 One eruption of Aguas Calientes postdates the first centre of Lascar and was originally linked to the Lascar Piedras Grandes eruption, before sampling on the deposits of this eruption indicated a relationship with the Lascar volcano itself.Effusion of lava ceased after the cone was built.One summit lava flow may be of Holocene age, but no evidence of historical activity is found (González-Ferrán 1985).