- Thewholesequencerepresentsacompletevolcanic-eruptivesedimentarycycle.Apustulecausedbysmallpoxorasimilareruptivedisease.Ageyserisanintermittentlyeruptivehotspring.Aneruptivepassagewayopeningintothecraterofavolcano.Thebasinfillinggeometricpatternofvolc...
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