Explosive eruptions in volcanoes with viscous lava and high gas content occur due to pressure build-up. Gas levels create bubbles leading to explosive eruptions from pent-up pressure.
Explosive eruptions occur in volcanoes with very viscous lava and high amounts of gas under pressure. The pressure builds as magma, high in silica, rises through the central vent until an eruption of great force occurs.
Gas content plays a significant role in explosive eruptions, with high gas levels creating more bubbles as magma approaches the surface, leading to pent-up pressure that causes explosive eruptions.
The process for building pressure involves magma being under high pressure as it rises, with viscous magma that is too thick to flow easily, trapping gas until the pressure becomes excessive and results in an explosive eruption.
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