Which outcome is caused by gas pressure increase within volcanic domes?

💡 Explanation

Increased gas pressure in volcanic domes causes explosive eruptions because the pressure exceeds the dome's mechanical strength, driving fragmentation, creating erupting tephra via Vulcanian eruptions; therefore, it is tephra, rather than lava, that is ejected, because gas pressure overwhelms magma viscosity.

• Which long-term outcome arises after a river erodes the neck of an oxbow lake during annual floods?
• Which mechanism causes increased cirque erosion following deglaciation?
• Which risk increases when rainfall reduces loess infiltration?
• Which outcome results when wave diffraction focuses energy?
• Which landscape outcome strongly accelerates if cave collapse triggers altered local groundwater pathways?
• Near-surface pipeline integrity decreases when which process occurs?