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← GeographyWhich outcome occurs when viscous lava rises relatively uniformly within a stratovolcano?
A)Formation of an exogenous lava dome✓
B)Generation of a pyroclastic surge
C)Development of an ash column plume
D)Occurrence of a phreatomagmatic explosion
💡 Explanation
An exogenous lava dome forms from the effusion of viscous lava undergoing plastic deformation; rather than fragmenting into pyroclastics, laminar flow creates the expanding dome, because the low gas content inhibits explosive activity, therefore the process is plastic deformation, not fragmentation.
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