DeCS Server - List Exact Term

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DeCS

Descriptor English:

Volcanic Eruption

Descriptor Spanish:

Erupciones Volcánicas

Descriptor Portuguese:

Erupções Vulcânicas

Synonyms English:

Volcanic Ash
Volcanic Gases

Tree Number:

Definition English:

The ash, dust, gases, and lava released by volcanic explosion. The gases are volatile matter composed principally of about 90% water vapor, and carbon dioxide, sulfur dioxide, hydrogen, carbon monoxide, and nitrogen. The ash or dust is pyroclastic ejecta and lava is molten extrusive material consisting mainly of magnesium silicate. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

Indexing Annotation English:

specify geog

History Note English:

95; was VOLCANIC ERUPTIONS see NATURAL DISASTERS 1982-94

Allowable Qualifiers English:

Record Number:

31975

Unique Identifier:

D018707

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