Internal Parts of the Volcano

Internal Parts of the Volcano

Magma

- Molten rock beneath Earth's surface.

Parasitic Cone

- A small cone-shaped volcano formed by an accumulation of volcanic debris.

Sill

- A flat piece of rock formed when magma hardens in a crack in a volcano.

Vent

- An opening in Earth's surface through which volcanic materials escape.

Flank

- The side of a volcano.

Lava

- Molten rock that erupts from a volcano that solidifies as it cools.

Crater

- Mouth of a volcano - surrounds a volcanic vent.

Conduit

- An underground passage magma travels through.

Summit

- Highest point; apex

Throat

- Entrance of a volcano. The part of the conduit that ejects lava and volcanic ash.

Ash

- Fragments of lava or rock smaller than 2 mm in size that are blasted into the air by volcanic explosions.

Ash Cloud

- A cloud of ash formed by volcanic explosions.

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