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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.
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Do shield volcanoes have high silica or low silica?
Shield volcanoes produce low-silica lava.
How does silica affect the shape of a volcano?
A high silica content of the magma will form tall, steep-sided, or cone-shaped mountains. A low silica content produces shield shaped or broad volcanoes.
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.
Higly explosive volcanoes tend to have what type of magma?
Magma with high silica, high viscosity, and higher gas content.
What is common of most volcanoes that have the most violent eruptions?
They feature magma with very high silica content.
Do shield volcanoes have high silica or low silica?
Shield volcanoes produce low-silica lava.
How are shield volcanoes and cinder cone volcanoes somewhat same?
Both erupt basaltic lava, which has a low silica content and a high temperature.
How does silica affect the shape of a volcano?
A high silica content of the magma will form tall, steep-sided, or cone-shaped mountains. A low silica content produces shield shaped or broad volcanoes.
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.
Higly explosive volcanoes tend to have what type of magma?
Magma with high silica, high viscosity, and higher gas content.
What is common of most volcanoes that have the most violent eruptions?
They feature magma with very high silica content.
Why is the silica content of lava important?
The more silica crystal within the magma, the more viscous the magma is, because of crystals sticking together. So magma with low silica content is runny, and wiht just flow gently out of a volcano, like in hawai, but viscous (sticky, like honey) magma will not, and gas gets trapped within it, and then explodes out, cause large scale explosive erruptions.
What properties of magma help determine the type of eruption?
The properties of magma that help to determine the type of eruption are the magma's viscosity and its silica content. Those volcanoes that exhibit massive eruptions have a high viscosity and high silica content.
What are runny and sticky lava?
Runny lava contains low amounts of silicon, whereas sticky lava contains high amounts of silicon.
What is the silica content of magma?
Mt. Etna is a stratovolcano like Krakatoa and Mt. Vesuvius, therefore it has a high silica content. Though lava with a high silica content does not tend to travel very far away from the source; it can be a double edged sword as magma with a high silica content tends to trap gasses until it reaches a bursting point, ending in a massive eruption.
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.
What is the behavior of lava with silica content being high and low?
Lava with high silica content will erupt explosively, if it has low silica content it will flow.
