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Usually very viscous magma is rich in gasses, so it will erupt explosively, forming clouds of ash and pumice rather than lava flows. If the magma is fairly depleted in gasses then it may form a lava dome. The lava in this case is too viscous to flow away from the vent, so instead it piles up on top of it. Such domes may sometimes form thick, short lava flows called coulees.
What else can I help you with?
When does an active volcano erupt?
An active volcano erupts when there is an accumulation of magma beneath the surface that builds up pressure and eventually forces its way out through the volcano's vent. Factors such as the composition of the magma, tectonic activity, and gas content can influence the frequency and intensity of eruptions.
What has to happen for arenal volcano to erupt?
Magma has to enter the magma chamber beneath Arenal.
What is A vent at the earths surface through which magma and gasses erupt called?
This describes a volcano.
Reservoir from which volcanic materials erupt?
Magma chamber? Or the lithosphere or a mantle plume, depending on where the volcano is.
What is a vent called through which gas and ash and magma erupt onto the earth's surface?
A vent through which gas, ash, and magma erupt onto Earth's surface is called a volcano.
What does the amount of silica in a volcanos magma determine about its eruption?
If a volcano's magma is high in silica, the volcano will probably erupt explosively. If the magma is not high in silica, the volcano will probably erupt quietly.
What causes the difference between quiet and exploses eruptions?
It depends on how much silica is in the magma. If there is low-silica in the magma then the volcano will erupt quietly. If there is high-silica in the magma then the volcano will erupt explosively.
When does an active volcano erupt?
An active volcano erupts when there is an accumulation of magma beneath the surface that builds up pressure and eventually forces its way out through the volcano's vent. Factors such as the composition of the magma, tectonic activity, and gas content can influence the frequency and intensity of eruptions.
What has to happen for arenal volcano to erupt?
Magma has to enter the magma chamber beneath Arenal.
What is the hottest volcno to ever erupt?
What is the definition for volcano and magma
What causes some volcanos to erupt quietly?
the preasure of the magma is not putting that much preasur
What is A vent at the earths surface through which magma and gasses erupt called?
This describes a volcano.
Reservoir from which volcanic materials erupt?
Magma chamber? Or the lithosphere or a mantle plume, depending on where the volcano is.
What is a vent called through which gas and ash and magma erupt onto the earth's surface?
A vent through which gas, ash, and magma erupt onto Earth's surface is called a volcano.
When is a volcano most likely to erupt?
A volcano is most likely to erupt when the pressure from the magma chamber overcomes the strength of the rock holding it in place. This can occur when there is an increase in magma supply, changes in gas content, or disruptions in the surrounding rock. Monitoring systems can help predict when a volcano is likely to erupt.
How did the icelandic volcano erupt?
It is the result of moving magma underground creating pressure
How far can Kilauea the volcano erupt?
That depends on the forc of the eruption and the viscosity of the magma.
