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What are the magma types in order of decreasing viscosity?

Most viscous Felsic magma i.e. rhyolite Intermediate magma i.e. andersite Mafic magma i.e. Basalt Ultramafic magma i.e. Komatiite Least viscous


Is felsic magma viscous?

Yes. Felsic magma is very viscous.


What are the two types of magma and what makes them different?

I'm not sure... but the two different types of lava are: Viscous - sticky and slow moving, resulting in tall volcanoes Non Viscous - runny and fast moving, resulting in short and very spread out volcanoes (shield volcanoes)


How does higher viscous magma flow?

Higher viscous magma flows slower and with more difficulty compared to lower viscous magma. This is because higher viscous magma has a higher resistance to flow due to its thicker consistency, which can result in more explosive and violent eruptions.


Is felsic magma eruptive?

Not usually. Because it is so viscous, felsic magma does not erupt as easily as mafic magma. While eruptions of felsic magma do occur, most felsic rocks are intrusive, meaning they solidify underground.


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.


Correct order of decreasing magma viscosity?

The amount of viscosity present in magma depends on the amount of silica it has. A composite volcano produces rhyolitic lava which is very thick. A shield volcano produces a basaltic lava with less silica and significantly less viscosity.


How is strength of a volcano eruption related to the magma in the volcano?

If the magma is more viscous, the eruption is stronger.


How will stiff magma create an explosive eruption?

The more viscous or "stiff" types of magma usually contain more trapped gasses. When the magma reaches lower pressure near the surface, the gasses expand explosively, blasting ash and pumice into the air.


Which is the most abundant in magma and has the greatest effect on its characteristics?

Silica is the most abundant component in magma and has the greatest effect on its characteristics. The amount of silica present determines the magma's viscosity, which in turn influences the explosiveness of volcanic eruptions.


What effect does silicia content have on the characteristics of magma?

Silica-rich magma is much more thick and viscous.


Do cryptodomes have vicious magma?

Yes. A cryptodome indicates that highly viscous magma is relatively close to the surface.