What effect does silica have on magma that helps eruption explosive?

What effect does silica have on magma that helps eruption explosive?

A more viscous (thick) magma will produce a more violent eruption This is controlled in part by the concentration of silica in the magma. A magma with low silica (<45%) will be runny and so the eruption will not be explosive. A magma with high silica (>60%) will be quite viscous and so the eruption will be violent.

How does silica content affect magma?

A magma’s silica content will not only control the rock type that forms, it also controls the relative viscosity of the magma. Differences in a magma’s viscosity will determine the shape a volcano takes. High-silica (basalt) magma has a much lower viscosity. It flows much easier and over longer distances.

Why does silica cause explosive eruptions?

Silica increases the viscosity of magma (makes it less runny) which traps bubbles of gas in the magma, increasing pressure and therefore leading to a more explosive eruption.

Does silica content affect explosiveness?

In the former, viscous molten rock with a high silica content tends to trap volcanic gases more readily. This increases the pressure on the magma column such that it can ultimately lead to an explosion. Basaltic magmas, meanwhile, have a low silica content and tend to be runnier.

Is high silica magma more explosive?

Magmas with high silica content have a high viscosity (resistance to flow) and are generally more explosive when eruptions occur. All magmas also contain some degree of trapped gasses (CO2 & H2O ).

What type of magma produces explosive eruptions?

Explosive eruptions are favored by high gas content & high viscosity magmas (andesitic to rhyolitic magmas).

Does more silica mean more explosive?

As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions. Magmas with high silica content tend to erupt violently, because they are viscious.

Does silica make magma explosive?

Because volcanic magma becomes more silica-rich with time, its explosive potential increases.

Why is silica content so important?

Compelling data suggest that silica is essential for health although no RDI has been established. However, deficiency induces deformities in skull and peripheral bones, poorly formed joints, reduced contents of cartilage, collagen, and disruption of mineral balance in the femur and vertebrae.

What is the main cause of strong explosive eruptions?

In magma, the rapid formation of bubbles comes from pressure being lowered as the magma moves from deep inside the earth’s crust up to the earth’s surface. This accelerates the magma and can stretch it to a point that it breaks and creates an explosive eruption.

What happens when silica increases?

Kidney Disease – Studies of workers have shown that increasing levels of silica exposure are associated with increasing risks for chronic kidney disease. Autoimmune Disease – Studies of workers have shown that silica exposure is associated with increased risk for a variety of autoimmune diseases.

What does it mean when a volcano has high silica content?

Because it is more difficult for dissolved gas to escape from more viscous magma, higher silica magmas generally erupt more explosively.

What mineral makes magma explosive?

Gas gives magmas their explosive character, because volume of gas expands as pressure is reduced. The composition of the gases in magma are: Mostly H2O (water vapor) & some CO2 (carbon dioxide) Minor amounts of Sulfur, Chlorine, and Fluorine gases.

How do you increase explosive force?

1. Plyometrics.
2. Squats.
3. Weighted/dynamic step ups.
4. Overhead walking lunges.
5. Sprints.
6. Agility drills.

1. Plyometrics.
2. Squats.
3. Weighted/dynamic step ups.
4. Overhead walking lunges.
5. Sprints.
6. Agility drills.

Which is likely to produce the most explosive eruption?

Stratovolcanoes are more likely to produce explosive eruptions due to gas building up in the viscous magma.

Which magma is the most explosive?

Rhyolitic and andesitic are two types of magmas that are highly explosive. Each one produces volcanoes that have huge explosions. Also, these types of magmas will produces volcanoes that are taller in size and made of multiple layers of ash and lava, such as a cinder cone and stratovolcano.

What two factors control the explosiveness of an eruption?

The two main factors that influence how a volcano will erupt are viscosity and gas content. Both are related to the composition of the magma. Hawaiian volcanoes tend to erupt basalt, which is low in viscosity and low in gas content (about 0.5 weight percent).

Does silica make magma explosive?

Because volcanic magma becomes more silica-rich with time, its explosive potential increases.

How the presence of silica and water in magma increases the chances of an explosive eruption?

Explain how the presence of silicon or water in magma increases the chances of an explosive eruption. Both water and silicon increase the pressure that build up in the volcano. The water because it makes vapor and the silicon because it moves so slowly.

Do explosive eruptions have silica-rich and felsic magma?

The type of eruption a volcano has depends on the composition of the magma. Silica-rich, felsic magma can trap a lot of gas. So these magmas produce explosive eruptions.

How are silica and water related to a volcanoes explosiveness?

As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions. Magmas with high silica content tend to erupt violently, because they are viscious.