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← GeographyWhich outcome occurs when the upwelling lava's flow is significantly decreased?
A)Subduction zone pressure increases rapidly
B)Shield volcano formation occurs quickly
C)A steep-sided lava dome forms✓
D)The cinder cone erodes completely
💡 Explanation
A lava dome will form because decreased lava fluidity coupled with persistent but reduced upwelling leads to localized piling up of the lava; the mechanism is viscous deformation. Therefore, a lava dome creates mounds rather than flows.
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