Some information on geology: Difference between revisions
Types Of Lava |
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There are three types of lavas formed by volcanoes. Mafic, Intermediate, and Felsic. | There are three types of lavas formed by volcanoes. Mafic, Intermediate, and Felsic.<br> | ||
'''Mafic'''(Basaltic) | '''Mafic'''(Basaltic)<br> | ||
%SiO2: < 50% | %SiO2: < 50%<br> | ||
%FeMg: 4% | %FeMg: 4%<br> | ||
Temp: up to 1500C | Temp: up to 1500C<br> | ||
Viscosity: Low | Viscosity: Low<br> | ||
Eruptive Behavior: gentle | Eruptive Behavior: gentle<br> | ||
Distribution: divergent plate boundries, hot spots, convergent plate boundries | Distribution: divergent plate boundries, hot spots, convergent plate boundries<br> | ||
'''Intermediate'''(Andesitic) | '''Intermediate'''(Andesitic)<br> | ||
%SiO2: ~60% | %SiO2: ~60%<br> | ||
%FeMg: ~3% | %FeMg: ~3%<br> | ||
Temp: ~1000C | Temp: ~1000C<br> | ||
Viscosity: Intermediate | Viscosity: Intermediate<br> | ||
Eruptive Behavior: explosive | Eruptive Behavior: explosive<br> | ||
Distribution: convergent plate boundries | Distribution: convergent plate boundries<br> | ||
'''Felsic'''(Rhyolitic) | '''Felsic'''(Rhyolitic)<br> | ||
%SiO2: >70% | %SiO2: >70%<br> | ||
%FeMg: 2% | %FeMg: 2%<br> | ||
Temp: 700C | Temp: 700C<br> | ||
Viscosity: High | Viscosity: High<br> | ||
Eruptive Behavior: explosive | Eruptive Behavior: explosive<br> | ||
Distribution: hot spots in continental crusts (Yellowstone National Park) | Distribution: hot spots in continental crusts (Yellowstone National Park) | ||
Revision as of 17:23, 5 October 2004
There are three types of lavas formed by volcanoes. Mafic, Intermediate, and Felsic.
Mafic(Basaltic)
%SiO2: < 50%
%FeMg: 4%
Temp: up to 1500C
Viscosity: Low
Eruptive Behavior: gentle
Distribution: divergent plate boundries, hot spots, convergent plate boundries
Intermediate(Andesitic)
%SiO2: ~60%
%FeMg: ~3%
Temp: ~1000C
Viscosity: Intermediate
Eruptive Behavior: explosive
Distribution: convergent plate boundries
Felsic(Rhyolitic)
%SiO2: >70%
%FeMg: 2%
Temp: 700C
Viscosity: High
Eruptive Behavior: explosive
Distribution: hot spots in continental crusts (Yellowstone National Park)