Inside A Volcanic Eruption

Inside a volcanic eruption



A typical volcano



Crater



Lava



Conduit



A volcanic eruption is the ejection of molten rock, or lava, with ash, hot water, rock fragments, and cliff soil through an opening in the Earth's surface



The Earth's crust Magma chamber Magma tubes



Magma and the volcanic eruption process:



A hot silicate mixture, magma forms in the Earth's crust or inside the upper mantle of the Earth



It is comprised of molten lithospheric rocks, as well as gases and water vapor



Lighter than surrounding rocks, it rises slowly to the surface and builds up in underground reservoirs, called magma chambers



The gas pressure increases, and gases being to spew out



The magma rises to the surface



The gases expand as the magma rises along the conduit



The magma swells up and explodes



It now moves more quickly along the conduit. This process becomes unstable and turbulent



The magma pulsates and explodes as it leaves the chamber



Lava, a fiery mixture of semi-molten rock, gases, vapor, and ash is ejected onto the surface with tremendous force Inside a volcanic eruption A typical volcano A volcanic eruption is the ejection of molten rock, or lava, with ash, hot water, rock fragments, gases, and cliff soil through an opening in the Earth's surface Crater Lava Conduit- The Earth's crust Magma chamber Magma tubes Magma and the volcanic eruption process: · A hot silicate mixture, magma forms in the Earth's crust or inside the upper mantle of the Earth - It is comprised of molten lithospheric rocks, as well as gases and water vapor Lighter than surrounding rocks, it rises slowly to the surface and builds up in underground reservoirs, called magma chambers - The gas pressure increases, and gases begin to spew out The magma rises to the surface - The gases expand as the magma rises along the conduit - The magma swells up and explodes - It now moves more quickly along the conduit. This process becomes unstable and turbulent - The magma pulsates and explodes as it leaves the crater • Lava, a fiery mixture of semi-molten rock, gases, vapor, and ash is ejected onto the surface with tremendous force RIANOVOSTI O 2011 www.rian.ru