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When it cools and crystallizes into rock, the rock will be described as felsic igneous rock. Examples of felsic igneous rocks are granite, rhyolite, and pumice.

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What two properties of magma determine what kind of volcano will form?

The silica content and the gas content of magma are two properties that determine what kind of volcano will form. Magma with low silica content and low gas content tends to form effusive, shield volcanoes, while magma with high silica content and high gas content tends to form explosive, stratovolcanoes.


What mineral that affects magma thickness?

The mineral that affects magma thickness is silica. Magma with high silica content tends to be more viscous, resulting in thicker magma. Conversely, magma with low silica content is less viscous and flows more easily.


Does the increase in silica increase the viscosity of a magma?

it is normally intermediate flow because of the silica content.


How does silica affect the shape of a volcano?

High silica content in magma can lead to explosive eruptions and the formation of steep-sided volcanoes, such as stratovolcanoes. This is because high silica magma is thicker and more viscous, which traps gases and builds up pressure before erupting violently. The high viscosity of silicic magma prevents it from easily flowing, resulting in the steep shape of the volcano.


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.


This type of magma has low silica content?

Mafic magma has low silica content. It is usually rich in magnesium and iron, leading to its high density and fluid-like behavior. Mafic magmas tend to form basaltic rocks when they solidify.


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 type of magma has a high silica content?

rhyolitic magma has a lot of silica and water vapors... thanks for asking answers.com ;)


Is andiestic magma high in silica?

Yes, andesitic magma is intermediate in silica content, typically ranging between 57-63% silica. This silica content contributes to its intermediate viscosity and eruptive behavior, which often results in explosive eruptions.


What element has the greatest effect on magma characteristics?

The silica content in magma has the greatest effect on its characteristics. High silica content makes magma more viscous and results in explosive volcanic eruptions, while low silica content produces runny magma and less explosive eruptions.


What conditions make for a violent volcano eruptions?

magma and high silica content


Magma flows easily when it is low in?

silica content. High temperature and low silica content in magma allow for easier flow due to reduced viscosity. This type of magma often results in non-explosive volcanic eruptions with lava flows.