DeCS Server - List Exact Term

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DeCS

Descriptor English:

Volcanic Eruptions

Descriptor Spanish:

Erupciones Volcánicas

Descriptor Portuguese:

Erupções Vulcânicas

Synonyms English:

Volcanic Ash
Volcanic Eruption
Volcanic Gases
Volcanoes

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 geographic term if pertinent

History Note English:

2009 (1995); use NATURAL DISASTERS 1982-1994

Allowable Qualifiers English:

AE adverse effects	AN analysis
CL classification	EC economics
ES ethics	HI history
LJ legislation & jurisprudence	SN statistics & numerical data

Record Number:

31975

Unique Identifier:

D018707

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