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 mechanism triggers mudflow surge on an alluvial fan after intense rainfall?
• Which outcome results from reduced vegetation cover in semiarid regions?
• Which outcome increases when acidic rain infiltrates fractured limestone?
• Which outcome during glacial retreat facilitates esker formation?
• Which outcome results when channel avulsion breaches a levee?
• Which outcome usually occurs when stress overcomes frictional lock on a transform fault?