volcano chile mountain summit high summit southernmost active volcano features lava flows block ash flows lava volcano volcano active pleistocene major occurring ago ago accompanied formation historical volcanic activity clear eruption considered unconfirmed linked activity observed november september seismic activity observed ongoing activity releasing long ton dioxide left deposits active crater inhabited reconnaissance watched service possibility energy production volcano examined etymology alternative names derives feather grass small vessel hole pit crater alternative names geography geology regional setting plate plate beneath western south_america generated belt volcanic activity named belt separated number volcanic zones segments lacking recent volcanic activity segments shallow plates presumably away segments segments active world catalogue counts entire volcanic belt volcanic activity belt usually linked causes water components added mantle case addition generates modified thick crust area forming local setting linked plate beneath south_america plate past triggered crust approximately volcanic centres active potentially active found centres active include including displayed activity arid climate area led good preservation volcanic structures small gap wide known gap includes volcano features vigorous seismic activity separates north elliptical alignment extends east linked cup shaped intrusion crust volcano northeast southeast lies end chain trends northeastward away volcanic complex sits layers thick erupted stages terms composition pink grey crystals gray white forming lower member upper member contains volcanic rocks beneath altered older deeply eroded relatively small high volcano covers surface area km2 volume summit southwestern active youngest crater surrounded crater lava flows form lava seven short lava flows long thick total volume emitted weakly developed evidence glacial activity volcano current constructed collapsed older overall volcano morphology block ash flows thick lava flows high form found southwest volcano oldest lava flows northern eastern volcano erupted northeastern crater named crater thick features preserved volume younger flows known lava flows form distinct flows western sides volcano different appearances depending northwestern flows form lateral lava reach metres flows structures result high low eruption rates major block ash deposit volume covers surface area km2 highly mobile considering distances reached volcano sides younger crater contains large blocks long flow ridges second block ash flow formed collapse lava covers km2 blocks somewhat smaller ridges poorly developed generated large lava flows flanks covers surface area km2 northwest volcano thickness approximate volume probably linked case volcano oldest unit underwent flank collapse volcano older younger ago flank collapse extends southwest older crater thick formed collapse southwestern flank forms distinct units formed forming lava blocks flow ridges long stage associated individual crater named crater crater flank collapse probably produced volcano growth subsequent activity volcano completely filled lack ground activity suggests chamber deep linked thickness crust beneath ranging displays vigorous activity occupies half summit crater visible high temperatures composed mainly dioxide followed minor amounts hydrogen hydrogen hydrogen nitrogen oxygen addition carbon hydrogen found temperatures comparable exceed boiling point altitudes imagery indicates field small surface area high temperatures total dioxide volcano long ton activity left deposits volcano deposits found youngest crater area km2 form small flows type morphology deposits generally yellow close display different colours depending temperatures gravel deposits form units volcano composition rocks consist containing rich composition minerals comprise rocks lava flows composed composed block ash flows crater consist solely overall rocks belong potassium rich series typical formed mixing rocks minor evidence contamination similar located transition zones water important component volcano gases comprising volume examinations content water determined like water volcanic centres water mixture weather related water water contained indicate component dominates carbon dioxide comes gases escape pass weakly developed system temperatures appear history oldest rocks dated potassium dating oldest component clearly belonging volcano erupted forming multi layered probably generated injection new hot older cooler lava dome upper flank western volcano old block ash flow old dated crater old block ash flow southwestern flank formed years historical activity unclear unconfirmed eruption reported december activity crater reported march eruption reached altitude dispersed east probably triggered activity seen november colour changed black white repeatedly observed september incidents noticeable ground like area activity preceded ground inflation historical times theories including imagery proposed explain lack ground inflation ongoing seismic activity rate earthquakes days recorded separate phases november march april february respectively including seismic measurement period recorded activity caused nearby mining projects noted including hot springs west northwest volcano threats exception remote areas closely watched remote volcano road main infrastructure affected future activity chile produces regular status reports examined potential location energy project involving company named prospect base indicated presence water temperatures deep reservoir
Irruputuncu