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VOLCANIC ASH
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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
Tree Number:
G01.311.340.900
G01.595.340.900
SP4.001.037.403.514.260
SP8.473.654.762.802
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
Occurrence in VHL
:
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