. ▁It ▁was ▁centered ▁between ▁the ▁Az uf rera ▁and ▁Rod ado ▁stage ▁edific es ▁ 0 . 3 5 – 0 . 2 3 ▁my a . ▁Most ▁la va ▁flows ▁from ▁this ▁stage ▁origin ate ▁on ▁a ▁ ▁long ▁r idge ▁that ▁includes ▁A uc an qu il cha ' s ▁highest ▁sum mit . ▁One ▁cr ater ▁on ▁the ▁n ortheast ▁side ▁of ▁the ▁r idge ▁fed ▁la vas ▁to ▁the ▁north . ▁Other ▁than ▁that , ▁most ▁flows ▁extend ▁south wards ▁ ▁from ▁the ▁vent , ▁and ▁with ▁the ▁exception ▁of ▁a ▁due ▁south ▁flow ▁ ▁thick ▁they ▁are ▁thin , ▁with ▁thick ness es ▁of ▁. ▁One ▁of ▁the ▁oldest ▁flows ▁has ▁been ▁compared ▁in ▁length ▁to ▁the ▁ 5 0 % ▁longer ▁Ch ao ▁D ac ite ▁flow ▁but ▁is ▁much ▁th inner . ▁The ▁flows ▁from ▁this ▁stage ▁are ▁weak ly ▁weather ed ▁and ▁partially ▁over lie ▁gla cial ▁depos its . ▁The ▁total ▁volume ▁is ▁, ▁indicating ▁a ▁flux ▁rate ▁of ▁. ▁ ▁The ▁vol cano ▁has ▁active ▁f umar oles ▁though ▁the ▁low - temper ature ▁f umar oles ▁are ▁not ▁visible ▁through ▁short ▁w avel ength ▁inf ra red ▁data ▁from ▁sat ell ites . ▁F umar ole ▁activity ▁was ▁observed ▁in ▁ 1 9 6 2 . ▁ ▁Gla ci ation ▁and ▁hydro log y ▁ ▁The ▁vol cano ▁is ▁currently ▁not ▁gla ci ated ▁despite ▁its ▁height , ▁due ▁to ▁the ▁ar id ity ▁of ▁the ▁climate . ▁The ▁Que br