Which process primarily shapes the topography of shield volcanoes?

💡 Explanation

Shield volcanoes primarily flatten their summits via effusive lava flow, a lower viscosity lava enabling widespread distribution due to gravity rather than buildup in a local area caused by higher-viscosity lava, therefore preventing steep slopes rather than building them.

• Which risk increases when highly viscous magma generates pyroclastic flows?
• Which outcome results when the ocean's mixing layer weakens?
• Which feedback mechanism explains higher sea surface temperatures that disrupt upwelling within an ocean gyre?
• Which outcome develops when cohesive properties saturate alluvial soil?
• Which outcome results when excessive erosion reduces sediment reaching coastal streams?
• After rapid tephra deposition from Plinian eruptions, which outcome diminishes slope erodibility?