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 Volcano—The main features of a volcano.
Crater
Lava
Parasitic cone
Cone
Vent
Ash and lava layers
Magma chamber
and have little explosive violence. If, on the other hand, the magma is sticky and full of gases that cannot easily escape, then, as the magma reaches the surface, the gases will burst out of the liquid, throwing
it out into the air and producing
a towering cloud of ash, gas, and steam. (See also: Volcanic activity.)
(For other types of volcano see:
Arc; Complex; Dormant;
Explosive eruption; Extinct;
Island arc; Pacific Ring of Fire; Dike Parasitic cone; Seamount; Supervolcano.)
Vulcanian-type eruption
(For information on the source of volcanoes see: Crust; Plate; Subduction zone.)
Sill
Vulcanian-type eruption
A type of explosive eruption that results in large amounts of ash as well as lava.
 Volcano—Kilauea, Hawaii, is an active volcano, with the last major eruption occurring in 1984.
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