Which outcome occurs when basaltic lava cools rapidly underwater?

💡 Explanation

Pillow lava forms during submarine eruptions; rapid cooling creates a solid outer skin that inflates with continued lava flow from within because heat dissipation is fast. Rapid quenching solidifies the outer layer rather than allowing effusive flow into broad sheets, therefore creating the inflated lobe shape instead of A'a or Pahoehoe structures.

• Which outcome arises when rapid freshwater influx occurs in a coastal karst aquifer system?
• Which mechanism primarily causes lobate terraces to form in high-latitude, gently sloping terrains during solifluction?
• Which risk increases during the earthquake cycle phase known as the interseismic period at a subduction zone?
• Which geological feature primarily results from mantle upwelling during oceanic plate subduction?
• Which process causes increased stream meandering downstream in a humid, temperate region due to deforestation?
• Which limit constrains the formation of extensive alluvial terraces in a rapidly uplifting mountain range?