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Volcano Info
EnchantedLearning.com
Volcano Dictionary

Volcano Activities and Printouts
Types of Volcanoes The Ring of Fire
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

D



dacite

Dacite is a type of volcanic rock that is light-colored and rich in silica (63 to 68 percent).


debris avalanche

A debris avalanche is a sudden rock/soil/debris slide and flows with great speed from a volcano.


debris flow

A debris flow (also called a mudflow or lahar) is a moving mixture of rock, water, and other debris.

decibel

Decibels (abbreviated dB) are the unit of measuring the loudness (or intensity) of sounds. 0 dB is the faintest audible sound. The decibel scale is logarithmic. Blue whale calls are up to 188 dB; this is the loudest animal sound, and is painful to the human ear. Volcano eruptions are one of the loudest sounds on Earth and are over 272 dB.


degree

A degree is a measure of temperature or angle.


diatreme

A diatreme is a volcanic vent or pipe that is formed by gas-charged magma.


dike

A dike is a sheet-like intrusion of magma (molten rock) that froces its way through a layer of fractured rock. The magma flows through cracks in the rock and later cools and solidifies into a sheet of igneous rock.


dome

A lava dome is a dome-shaped mound that is formed around a vent by viscous lava.


dormant volcano

A dormant volcano is a volcano that is not active now, but may erupt in the future.

dust

Volcanic dust is a solidified lava that is tiny particles. It is ejected from volcanos during an eruption.


Volcano Info
EnchantedLearning.com
Volcano

Volcano Activities and Printouts
Types of Volcanoes The Ring of Fire
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Click on an underlined word for more information on that subject.
If the volcano term you are looking for is not in the dictionary, please e-mail us.

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