📖 what
What is a lava dome?
VolcanoesLava
Quick Answer
A lava dome is a mound built by very thick lava that oozes out slowly and piles up near a volcanic vent.
The Full Story
Lava domes form when viscous magma, often rich in silica, cannot flow far and instead accumulates over the vent. They may grow by gradual extrusion or by repeated dome-building episodes. Because they can trap gas, domes are often unstable and may collapse, generating dangerous pyroclastic flows. The 1991 eruption of Mount Unzen in Japan is a well-known example of dome collapse hazards.
Key Facts
1.Lava domes form from viscous, slow-moving lava
2.Domes can collapse and trigger pyroclastic flows
3.Mount Unzen’s 1991 dome activity was deadly
YouTube Angle
Suggested video title for this topic:
"Why some lava piles into a dome instead of a river"