What type of magma would have a higher viscosity?
Rhyolitic magmas
Why is rhyolitic magma highest viscosity?
Magma Composition: Such magmas erupt as andesites and rhyolites or are intruded as granite masses. The more extensive silicate chain molecules render these magmas highly viscous, so when eruption occurs it is usually explosive (e.g. Mt St Helens).
Which magma type has the lowest viscosity?
Basaltic magma has the lowest viscosity, so more of it reaches the surface; the more viscous rhyolitic magmas are so sluggish that they tend to be trapped deep below the surface where they cool, solidify, and grow into the larger mineral crystals of plutonic rocks.
Which of the following compositions has the highest relative viscosity magma?
Granitic magma is thick and stiff and contains lots of silica and dissolved gasses. Granitic magma has the most silica and has the highest viscosity. 34) andesitic magma Andesetic magma has an intermediate amount of silica which gives it an intermediate viscosity, in between basaltic and granitic magmas.
What type of magma has the highest viscosity?
rhyolitic magma
Which magma type has a higher viscosity and why?
Of all the types of magma that exist, felsic magma has the most silica in it. The percentage of silica in felsic magma is between 65% and 70%, and, because of this, it also has the highest viscosity (gooiness) and gas content.
What makes magma have a high viscosity?
Magmas that have a high silica content will therefore exhibit greater degrees of polymerization, and have higher viscosities, than those with low-silica contents. The amount of dissolved gases in the magma can also affect it’s viscosity, but in a more ambiguous way than temperature and silica content.
What are 3 types of magma and what is their viscosity?
Summary TableMagma TypeSolidified RockViscosityBasalticBasaltLowAndesiticAndesiteIntermediateRhyoliticRhyoliteHighNov 24, 2021
Is rhyolitic magma highest viscosity?
Rhyolitic magmas tend to have even higher viscosity, ranging between 1 million and 100 million times more viscous than water.
Which magma has the highest viscosity?
Of all the types of magma that exist, felsic magma has the most silica in it. The percentage of silica in felsic magma is between 65% and 70%, and, because of this, it also has the highest viscosity (gooiness) and gas content.
What causes high viscosity in magma?
rhyolitic magma
