 The volcano appears to be part of a north @-@ south trending group of rhyolitic , silicic Quaternary volcanoes ( including <unk> Volcanic Field , Laguna del Maule , and Volcán <unk> ) that veers off the north @-@ northeast direction of the rest of the Andes . The directional formation of this belt corresponds to the fold @-@ and @-@ thrust movement of the nearby <unk> fault , which formed in the Tertiary and remained active until the early Pliocene or late Miocene . This may suggest that Calabozos ' activity is more dependent on local processes than subduction of the Nazca Plate . 
