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Volcano's Deadly Warning

Anatomy of a Volcano

 

Intro | Ash | Lava flow | Lava dome |  Lava  | Vent | Tephra | Caldera | Lahar | Fissure | Dike | Magma

Volcano's Deadly Warning homepage

Lava
Diagram of a volcano

Lava
Lava is the word for magma when it erupts onto the Earth's surface. Geologists also use the term to describe the solidified deposits of lava flows and fragments hurled into the air by explosive eruptions (for example, lava bombs or blocks). Lava is from the Italian word for stream, which is derived from the verb lavare—to wash.

Left: A fast-moving lava flow from Mt. Etna in Sicily. Lava flows can also move slowly, especially as they begin to cool and develop a hard crust.

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