Which outcome occurs when a cooled lava flow's surface prevents gas escape?

💡 Explanation

Internal pressure buildup occurs because vesicle nucleation requires volume, and a cooled, solidified surface inhibits gas dispersal; this causes increased internal pressure ultimately leading to dangerous explosive eruptions, rather than gradual degassing.

• Which risk increases when a subsurface fault line intersects a large reservoir?
• Which effect results when increased surface heating strengthens Hadley cell circulation?
• Prolonged rainfall increases stress on river levees, causing which failure mode when shear strength decreases?
• Which outcome occurs when sediment pore pressure reduces during subduction?
• Which mechanism alters stream flow acidity after acid rain due to surface runoff?
• Which risk increases when polar jet stream meandering amplifies?