Which mechanism causes a caldera to form following a large volcanic eruption?

💡 Explanation

When a large eruption depletes the magma chamber, the roof collapses inwards because the internal support pressure is insufficient, creating a large depression called a caldera. Therefore magma chamber collapse results, rather than isostatic rebound, glacial erosion, or tectonic uplift which require distinctly different geological processes.

• Which process dictates sediment direction around coastal island complexes?
• Which risk to coastal infrastructure increases when deep-sea earthquakes trigger underwater landslides near a subduction zone?
• Which mechanism causes an increase in coastal mountain elevation as a continental plate overrides a subducting oceanic plate?
• Which outcome results when interseismic stress exceeds frictional strength along a subduction zone megathrust fault?
• Which consequence results when rapid groundwater withdrawal accelerates?
• Which process limits levee growth due to sediment discontinuities?