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What term is used to describe magma that is rich in feldspars and silica?
Felsic magma. This type of magma is viscous with high silica content, resulting in explosive eruptions and the formation of light-colored rocks.
What type of magma erupts out of dome complexes?
Viscous and silica-rich magma, such as dacite or rhyolite, often erupts out of dome complexes. Due to its high viscosity, this type of magma tends to form domes and does not flow as easily as basaltic magma.
What type of magma will produce explosive eruptions?
Magma with high silica content (felsic magma) tends to produce explosive eruptions because it is more viscous and traps gases, leading to pressure build-up before they are released explosively. This type of magma commonly forms in subduction zones where oceanic plates are being subducted beneath continental plates.
What type of magma is most dangerous?
Well, lava and magma can be very very dangerous! Lava is something that you can die in. And magma is still lava. They both can be very dangerous! So I would say it is 90% dangerous.
Why are eruption of mafic magma are quiet while eruption of Felsic magma are explosive?
Mafic magma, which is low in silica content, has a lower viscosity, allowing gases to escape easily during an eruption, resulting in quiet flows. In contrast, felsic magma is high in silica, making it more viscous and trapping gases within. When pressure builds up in felsic magma, it can lead to explosive eruptions as the trapped gases are released violently. This fundamental difference in composition and viscosity accounts for the contrasting eruption styles.
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 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
What term is used to describe magma that is rich in feldspars and silica?
Felsic magma. This type of magma is viscous with high silica content, resulting in explosive eruptions and the formation of light-colored rocks.
Why silica rich magma is more dangerous than iron rich magma?
The silica-rich magma, also called felsic magma, is more viscous than iron-rich or mafic magma. This means resists flow more (just as syrup is more viscous than water). The high viscosity means that the felsic magma can trap more gasses, leading to explosive eruptions, rather than effusive ones.
Why do granitic felsic magmas usually crystallize before reaching earth's surface?
Felsic magma is very viscous, so if often gets "stuck" in plutons rather than erupting.
What type of magma erupts out of dome complexes?
Viscous and silica-rich magma, such as dacite or rhyolite, often erupts out of dome complexes. Due to its high viscosity, this type of magma tends to form domes and does not flow as easily as basaltic magma.
What type of magma will produce explosive eruptions?
Magma with high silica content (felsic magma) tends to produce explosive eruptions because it is more viscous and traps gases, leading to pressure build-up before they are released explosively. This type of magma commonly forms in subduction zones where oceanic plates are being subducted beneath continental plates.
What type of magma is most dangerous?
Well, lava and magma can be very very dangerous! Lava is something that you can die in. And magma is still lava. They both can be very dangerous! So I would say it is 90% dangerous.
What type of magma causes violent erpuptions?
Highly viscous felsic magma causes the most violent volcanic eruptions.
Where do mafic and felsic magma originate?
Felsic is a term that means that a rock contains types of silica. Fesic magma is magma that is high in silica particles and low in iron particles.
Which moves fast felsic lava or mafic lava?
A mafic lava flow will move faster than a felsic lava flow due to its lower viscosity. However, felsic magma tends to erupt explosively, producing fast-moving pyroclastic flows instead of lava flows.
What type of magma has a high silica content?
rhyolitic magma has a lot of silica and water vapors... thanks for asking answers.com ;)
