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- Ejecta:
The material, and debris that are ejected from an erupting volcano.
- Eruption:
The explosive, or slow emission of solids, liquids, and gases from a
volcano.
- Eruption
Cloud: A column of gases, ash and rock particles rising from a
vent or crater.
- Eruptive
Vent: An opening out of which gases, and other volcanic materials
are emitted.
- Extinct
Volcano: A volcano that shows no signs of ever erupting again.
- Fissures:
Elongated cracks, or fractures along the slopes of a volcano.
- Flank
Eruption: An eruption occurring on the side of the volcano as
opposed to its peak.
- Fumarole:
A vent from which steam and gases are emitted in both active and
dormant volcanoes.
-
Horizontal Blast: A lateral eruption.
- Hot Spot:
A weak sction in the Earth's crust where magma rises to the surface.
-
Hypabyssal: A rock mass created by a shallow intrusion of
magma.
-
Ignimbrite: A rock created by the welding together of ash and
other volcanic material.
-
Intrusion: The forcing of magma into an earlier rock formation.
- Lahar:
A a torrential mudflow of water mixed with volcanic debris.
- Lava:
Magma which has, or is coming out of a volcanic crater or fissure.
- Lava
Dome: A dome-shaped mass of congealed lava, formed by multiple
flows.
- Lava
Flow: The flow of lava from a volcanic crater of fissure.
- Lava
Fountain: A rhythmic vertical fountain-like eruption of lava.
- Lava Pond:
A lake of molten lava.
- Lava
Shields: A shield volcano made of basaltic lava.
- Lava
Tube: A pipe-like tunnel formed to drain the molten lava trapped
within the cooling lava flow.
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