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Earth & Natural Systems

If a volcano erupts effusively, releasing basaltic lava onto a gentle slope, which consequence follows?

A)Formation of a steep stratovolcano
B)Violent pyroclastic density current
C)Rapid caldera collapse event
D)Development of a broad shield volcano

💡 Explanation

Basaltic lava has low viscosity and flows easily; therefore, effusive eruptions on gentle slopes allow lava to spread widely, building a shield volcano because the lava flows horizontally rather than piling up steeply as in stratovolcano formation.

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