In the Miocene-Pliocene (10-1 mya), calderas erupted felsic ignimbrites in four distinct pulses separated by periods of low levels of activity. At least three volcanic centres (Guacha caldera, La Pacana, Pastos Grandes, Vilama) had eruptions of a Volcanic Exposivity Index (VEI) of 8, as well as smaller scale eruptive centres. Activity waned after 2 mya, but present-day geothermal activity and volcanoes dated to the Holocene, as well as recent ground deformation at Uturunku volcano indicate still-extant present-day activity of the system.