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Composite volcanoes are often associated with moderate to high silica contestant, though in reality, the magma composition will vary over time.
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∙ 8y ago
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Do shield volcanoes have high silica or low silica?
Shield volcanoes produce low-silica lava.
What is the type of lava in the composite volcanoes?
Most composite volcanoes are comprised of Andesitic lava. Andesetic lava has an intermediate silica content compared to granitic with a high silica content and basaltic with a low silica content.
Are hawaiian volcanoes low or high in viscosity?
A lava dome indicates lava with a very high viscosity. A low viscosity lava would flows away rather than build into a dome.
How does water affect volcanoes?
low water and low silica: the eruption is not that strong; low water and high silica: the magma comes out like a toothpaste coming out of its tube high water and low silica: the lava flows fast and strong. high water and high silica: lava is pasty and thick and flows strongly
Does mt.st.helens have a high or low silica content?
Because Mount Rainier is a Strato Volcano it has both quiet and explosive eruptions. Explosive(pyroclastic) flows have a high silica level. Quiet have low silica levels. The more silica the thicker the magma.
Do shield volcanoes have high silica or low silica?
Shield volcanoes produce low-silica lava.
What is the type of lava in the composite volcanoes?
Most composite volcanoes are comprised of Andesitic lava. Andesetic lava has an intermediate silica content compared to granitic with a high silica content and basaltic with a low silica content.
Are hawaiian volcanoes low or high in viscosity?
A lava dome indicates lava with a very high viscosity. A low viscosity lava would flows away rather than build into a dome.
How does water affect volcanoes?
low water and low silica: the eruption is not that strong; low water and high silica: the magma comes out like a toothpaste coming out of its tube high water and low silica: the lava flows fast and strong. high water and high silica: lava is pasty and thick and flows strongly
Does mt.st.helens have a high or low silica content?
Because Mount Rainier is a Strato Volcano it has both quiet and explosive eruptions. Explosive(pyroclastic) flows have a high silica level. Quiet have low silica levels. The more silica the thicker the magma.
How are shield volcanoes and cinder cone volcanoes somewhat same?
Both erupt basaltic lava, which has a low silica content and a high temperature.
Why do silica-poor magmasproduce broad volcanoes with general slopes?
Because low silica magmas tend to be hotter and more fluid/runny than high silica magmas.
What is the silica content of lava in volcanoes where quiet or non explosive eruptions occur?
in quiet eruptions, the magma or lava contains more silica than explosive eruptions. in explosive eruptions magma has less silica because lava becomes less dense and can shoot out of an volcano
Do shield volcanoes have high silica content in the lava?
No, shield volcanoes are characterized by lava with a low silica content. Consequently, the principal hazard of the volcano is the lava flow rather than the eruption itself.
Does the lava that forms shield volcanoes probably have a lot of silica or water in it?
No. Shield volcanoes form from basaltic lava with a low silica content and a low water content.
Does mount erebus have high silica or low silica?
low
Which flows easier high silica magna or low silica magna?
High silica magma is more viscous (sticky) than low silica magma, so low silica magma lows easier.
