Effusive Eruptions Are Related to Which of the Following

question 33

Multiple Choice

Effusive eruptions are related to which of the following?

• A)magma with a 50 percent or lower silica content,rich in iron and magnesium
• B)high-viscosity magma
• C)magma with a 50-75 percent silica content,high in aluminum
• D)the volcanic activity near Mount St.Helens
• E)on the Pacific coast of Canada.

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