▁are ▁like wise ▁situated ▁on ▁this ▁alignment , ▁both ▁are ▁deeply ▁er oded ▁composite ▁vol cano es ▁of ▁small ▁dimensions . ▁Other ▁vol cano es ▁in ▁the ▁Southern ▁Vol can ic ▁Zone ▁have ▁similar ▁align ments , ▁such ▁as ▁Nev ados ▁de ▁Ch ill án ▁and ▁Pu ye h ue - C ordon ▁Ca ulle . ▁In ▁comparison ▁to ▁Vill arr ica , ▁Qu et rup ill án ▁has ▁been ▁less ▁active ▁and ▁its ▁er u ptions ▁were ▁also ▁smaller ▁than ▁Vill arr ica ' s , ▁with ▁no ▁large ▁py ro cl astic ▁flows ▁found ▁at ▁Qu et rup ill án . ▁ ▁Qu et rup ill án ▁is ▁a ▁ ▁high ▁composite ▁strat ov ol cano ▁with ▁a ▁ ▁wide ▁cal der a ▁and ▁a ▁shr inking ▁gla cier ▁cover . ▁The ▁vol cano ▁contains ▁in ▁total ▁two ▁nested ▁cal der as , ▁the ▁larger ▁of ▁which ▁is ▁ ▁wide , ▁and ▁a ▁field ▁of ▁la va ▁dom es , ▁ma ars ▁and ▁py ro cl astic ▁con es ▁that ▁occup y ▁a ▁surface ▁of ▁. ▁These ▁subs idi ary ▁v ents ▁include ▁the ▁sc oria ▁cone ▁Hu il il co , ▁the ▁Vol can es ▁de ▁L l anc ah ue ▁and ▁the ▁Vol cano es ▁de ▁Re ye h ue ico . ▁F iss ure ▁v ents ▁of ▁Ple ist oc ene - Hol oc ene ▁age ▁occur ▁on ▁the ▁southern ▁side ▁of ▁the ▁vol cano . ▁The ▁small ▁volume ▁of ▁the ▁main ▁Qu et rup ill án ▁ed