Temperature of eruption: Over 950°C (Usually 1100°C to 1200°C)
Usually erupt frequently and for long periods of time
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Andesitic Lava
Made at destructive margins
Medium silica content
Medium viscosity
Flows less easily and can form blockages in volcanic vents
Volcanic gases can't escape easily from viscous lava pressure builds up because of the lava blockages and trapped gases until the blockages are cleared by a violent eruption.
Eruptions are intermittent and are short-lived
Temperature of eruption: 750°C - 950°C
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Rhyolitic Lava
Made at destructive margins
High silica content
High viscosity (thick and sticky)
They flow less easily and often form blockages in volcanic vents, also volcanic gases can't escape easily from viscous lava.
Pressure builds up because of the lava blockages and trapped gases, until the blockages are cleared by a violent eruption.
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