List the four major magma compositions in order of silica content.
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Q46: Label the cross-section of the convergent boundary
Q47: Flood basalts such as those found in
Q48: The figure below shows mafic magma as
Q49: Briefly explain why and how magmas rise
Q50: Large igneous provinces are formed by _,which
Q52: Compare and contrast a dike and a
Q53: What is obsidian? How does it form?
Q54: A felsic,highly-vesicular volcanic rock is termed
A) pumice.
B)
Q55: Fragments of material erupted from a volcano
Q56: A volcanic arc results from _ tectonic
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