In Indian subcontinent one active volcano and another dormant volcano of Quaternary period are present in the Andaman Java subduction complex.The active Barren volcano throughout its history is erupting mainly tholeii...In Indian subcontinent one active volcano and another dormant volcano of Quaternary period are present in the Andaman Java subduction complex.The active Barren volcano throughout its history is erupting mainly tholeiitic basalt whereas the dormant Norcondam volcano is domal dacite and andesite volcano.In the Barren volcano wall,of 2km wide caldera is made up of prehistoric(~35 Ka)pyroclastics whereas the polygenetic tuff cone and valley fill are the products of historic(1787 yr)to recent activities of subaerial strombolian eruption and transient lava flows.展开更多
文摘In Indian subcontinent one active volcano and another dormant volcano of Quaternary period are present in the Andaman Java subduction complex.The active Barren volcano throughout its history is erupting mainly tholeiitic basalt whereas the dormant Norcondam volcano is domal dacite and andesite volcano.In the Barren volcano wall,of 2km wide caldera is made up of prehistoric(~35 Ka)pyroclastics whereas the polygenetic tuff cone and valley fill are the products of historic(1787 yr)to recent activities of subaerial strombolian eruption and transient lava flows.
