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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.
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∙ 6y ago
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∙ 10y agoAs its temperature decreases and its silica content increases magma will become more viscous (thicker and stickier).
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∙ 12y agoalmost all volcanoes erupt, lava that is thick and sticky causes the eruption to be explosive, causing volcanic ash ,cinders and bombs
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∙ 11y agoNo. If its is liquid
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∙ 11y agothe world may never know
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∙ 12y agoFalse
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∙ 14y agofalse
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When does an active volcano erupt?
They can erupt anytime, when magma rises from the mantle and spews out of the volcano.
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.
Why do some volcanoes erupt vilolently and some quietly?
this all has to do with where the volcano is located. some volcanos are located in places where ther is more activity underneath, and other have not so much activity. the more activity, the more violently the volcano will erupt.
What two types of openings does magma erupt from a volcano?
a vent and fissure eruption
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?
They can erupt anytime, when magma rises from the mantle and spews out of the volcano.
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 is A vent at the earths surface through which magma and gasses erupt called?
This describes a volcano.
What causes some volcanos to erupt quietly?
the preasure of the magma is not putting that much preasur
Why do some volcanoes erupt vilolently and some quietly?
this all has to do with where the volcano is located. some volcanos are located in places where ther is more activity underneath, and other have not so much activity. the more activity, the more violently the volcano will erupt.
How far can Kilauea the volcano erupt?
That depends on the forc of the eruption and the viscosity of the magma.
How did the icelandic volcano erupt?
It is the result of moving magma underground creating pressure
What two types of openings does magma erupt from a volcano?
a vent and fissure eruption
What factors determine whether a volcano has a violent or quiet eruption?
A volcano erupts when enough pressure builds up inside of it to unplug it's crater. The stronger the plug, the more force is needed to expel it, which results in a more violent eruption. Also, the stickiness of the lava is a factor. The more sticky the lava, the stronger the eruption.
