Table of Contents
What magma causes powerful explosive eruptions?
The style of a volcanic eruption depends on magma viscosity. Felsic magmas produce explosive eruptions. Mafic magmas produce effusive eruptions. Explosive eruptions happen along the edges of continents and produce tremendous amounts of material ejected into the air.
What causes explosive eruptions in volcanoes?
A volcano’s explosiveness depends on the composition of the magma (molten rock) and how readily gas can escape from it. As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions.
What is the most explosive form of magma?
Pelean eruptions are considered violently explosive. Plinian – These eruptions result from a sustained ejection of andesitic to rhyolitic magma into eruption columns that may extend up to 45 km above the vent.
What is the most explosive magma?
Pelean eruptions are considered violently explosive. Plinian – These eruptions result from a sustained ejection of andesitic to rhyolitic magma into eruption columns that may extend up to 45 km above the vent.
What causes the most explosive eruption?
Subduction Zone Volcanism Most explosive eruptions occur in volcanoes above subduction zones, where one tectonic plate dives beneath the other. Eighty to 120 kilometers below the surface, magma forms when the rocks of the mantle melt just above the subducting plate.
