- Thecalderaisconsideredanactivevolcano.Meinsteinsaidtheharboristhecalderaofavolcano.Themountainisencircledbythedoughnut-shapeddepressionofthecaldera.Finally,itisconcludedthatthecraterlakeisacaldera.Oneisavolcanicmountain,withaturquoiselakeinthecaldera...
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