Menu Close

What are the three factors that influence the viscosity of magma?

Admin

What are the three factors that influence the viscosity of magma?

Three factors that affect magma viscosity are temperature, composition, and presence of dissolved gases. Explain how the viscosity of magma influences the explosiveness of a volcano. More viscous magmas tend to generate more explosive eruptions.

What are two primary factors that affect the viscosity of magma?

The viscosity of a magma is affected by its silica content and temperature. The amount of silica influences the magma’s viscosity in such a way that if the silica content is low, the magma would have low viscosity, whereas a high content of silica would make the magma more thick and sticky.

What increases the viscosity of magma?

The viscosity of magma increases with: high % silica and cooler temperatures. The viscosity of magma helps determine if it will erupt explosively or effusively (quiescently).

What factors determine the type of magma?

Both the temperature and mineral content of magma affect how easily it flows. The viscosity (thickness) of the magma that erupts from a volcano affects the shape of the volcano. Volcanoes with steep slopes tend to form from very viscous magma, while flatter volcanoes form from magma that flows easily.

What factors influence magma lava viscosity?

Temperature, composition, and volatile (gas) content largely determine the viscosity of lava. Temperature: The hotter the lava, the lower the viscosity (the thinner it is). The cooler the lava, the higher the viscosity (the thicker it is).

What are the two primary factors that determine how magma erupts?

The two primary factors that determine how magma erupts is its viscosity and gas content.

What factors affect the viscosity of magma and lava?

What causes low viscosity in magma?

Why is it important to determine the viscosity of magma?

Among these factors, magma viscosity should be one of the most important, because the viscosity determines whether a dike (magma-filled crack) can be propagated with a high enough ascent velocity to overcome solidification [e.g., Rubin, 1995]. It is of importance that the magma viscosities can be calculated.

How is magma composition related to viscosity?

Magmas differ in composition, which affects viscosity. Magma composition has a large effect on how a volcano erupts. Felsic lavas are more viscous and erupt explosively or do not erupt. Mafic lavas are less viscous and erupt effusively.

What two things does the viscosity of magma depend on?

Viscosity can be described as a resistance to flow; for example, honey is more viscous than water because it flows more slowly than water. Viscosity in magma depends on two things: temperature and silica content. The higher the temperature of the magma, the lower the viscosity.

What factors affect a magma’s viscosity?

JOHN FLORENTINO E. ECHON

  • Factors that affect the viscosity of Magma 1. Temperature 2.
  • 1.
  • 2.
  • 3.
  • Viscosity of Magma in Different Conditions
  • Lava with less silica content has low viscosity that it can travel a great distance,forming a thin sheet.
  • Lava with high silica content is too viscous to travel far,and tends to break up as it flows.

    • What factors control the viscosity of magma and lava?

    There are factors that control viscosity of magma, such as temperature, gas content, and silica content. Out of this, silica content of magma affects most in the viscosity. Magma with high silica content (felsic magma) has high internal friction, thus high viscosity.

    How does gas affect viscosity of magma?

    When gases begin to escape (exsolve) from the magma, the effect of gas bubbles on the bulk viscosity is variable. Although the growing gas bubbles will exhibit low viscosity , the viscosity of the residual liquid will increase as gas escapes.