
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
Inside A Volcanic Eruption
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