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The higher the silica content of the magma, the more viscous the magma.
The higher the viscosity of the magma, the more explosive the eruptions of the volcano tend to be.
Lower silica content lavas tend to form shield volcanoes (such as the type formed on Hawaii) where the lava can flow very long distances as it has a much lower viscosity.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoThe amount of silica (SiO2) controls the viscosity, or the resistance of a substance to flow. The higher the silica level, the more viscous the magma is; therefore, the volcano eruption is greater and more explosive.
MORE SILICA => HIGHER THE VISCOSITY=> GREATER THE EXPLOSION
You're welcome ;)
So the low silica has less violence
Wiki User
∙ 11y agoThe more silica there is in a mass of magma, the more viscous it is, meaning the more it will resist flowing. A more viscous lava will be more difficult to erupt and can also hold more dissolved gasses. Low-silica magmas, primarily basaltic magmas, erupt fairly easily without too much force having to be applied, and so eruptions involving them are usually not particularly violent. Such magma usually do not hold much gas, which means there is little to no explosivity.
Magmas with a medium to high silica content. generally ranging from andesite to rhyolite, take a a lot of force to move through the earth, and can hold large quantities of dissolved gasses. When the magma reaches shallower levels, the gasses suddenly leave the solution and expand, resulting in an explosion.
Wiki User
∙ 13y agoyes more silica or water in the magma content makes volcanoes more explosive.
Kira Kira
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What kind of eruption is produced when basaltic lava that is low in silica flows from a volcano?
quiet nonexplosive eruptionsquiet nonexplosive eruptionsquiet nonexplosive eruptions
How does magma composition and the resulting eruption affect the form of a volcano?
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
What are the two factors the control whether a volcano eruption will be explosive or quiet?
water vapor and high in silica
If you have quiet eruption what kind of silica do you have?
If you have a quiet eruption you have low silica.
What two ingredients in magma affect the type of explosion and shape of a volcano?
water and mantle rock +++ More specifically, the silica proportion, plus water and gases from entrained wet, organic-rich sediment if the volcano is from subduction rather than a constructive plate margin. Increasing silica increases the magma's viscosity; the water and gas make it effervesce in the eruption.
How can the composition of magma affect the way volcano erupts?
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
What does the amount of silica in a volcanos magma determine about its eruption?
If a volcano's magma is high in silica, the volcano will probably erupt explosively. If the magma is not high in silica, the volcano will probably erupt quietly.
What kind of eruption is produced when basaltic lava that is low in silica flows from a volcano?
quiet nonexplosive eruptionsquiet nonexplosive eruptionsquiet nonexplosive eruptions
How does magma composition and the resulting eruption affect the form of a volcano?
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
What are the two factors the control whether a volcano eruption will be explosive or quiet?
water vapor and high in silica
What is the relationship between silica or water content of magma and materials ejected from an volcano?
The concentration of silica and water content in magma influence the force with which it is ejected from a volcano. The higher the levels of water and other gasses as well as the more silica it contains, the more explosive the eruption will be.
If you have quiet eruption what kind of silica do you have?
If you have a quiet eruption you have low silica.
What are the phases ofa volcano?
A volcano starts when a hole in the ground leeks magma. It lays out around the hole that started. It will take a while but eventually a big volcano will stand. It will be a composite volcano a shield volcano or a cinder cone volcano. The eruption wont always be explosive. It depends on the amount of silica in the lave. If it has alot of silica it will be explosive. If is low in silica it will ooz out. If you would like to know more go to www.newsdial.com Nature Natural Disasters .
What two ingredients in magma affect the type of explosion and shape of a volcano?
water and mantle rock +++ More specifically, the silica proportion, plus water and gases from entrained wet, organic-rich sediment if the volcano is from subduction rather than a constructive plate margin. Increasing silica increases the magma's viscosity; the water and gas make it effervesce in the eruption.
Who did Mount St Helen's eruption affect?
local people and the environment in which the volcano was in.
What kind of eruption is produced when basaltic lava that is low is silica flows from a volcano?
quiet nonexplosive eruptionsquiet nonexplosive eruptionsquiet nonexplosive eruptions
Do shield volcanoes have high silica content in the lava?
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.
