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silica is a rich compound consisting of silicon and oxygen and tends to be thicker and is more resistant to flow. other lava with less silica flows easily so the amount of water vapor and other gases trapped in lava influences how lava erupts.
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∙ 13y ago
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∙ 8y agoSilica-rich magma tends to trap water and gas bubbles, which causes enormous gas pressure within the magma. Hope this helps!? :)
Silica-rich magma erupts by creating a high viscous magma, which result into releasing high pressurized gases, that cause eruption.
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∙ 11y agoI am a straight A student I think I can answer this. Opps, sorry I can`t answer this question because I don`t get it and not even my brother and sister.
I am so sorry that I didn`t get to answer that question.
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∙ 9y agoHigh silica magma tends to be more viscous, which allows it to hold more gas. The gas is dissolved in the magma under pressure. When the magma nears the surface, the lower pressure allows the gas to come out of solution and expand violently.
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∙ 10y agoHigh silica magma is very viscous. More viscous magma generally contains more gasses, which expand explosively as the magma approaches the surface.
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∙ 9y agoSilica-rich magma is more viscous than lower-silica magma and tends to have a higher gas content. The gas, trapped under pressure, expands violently when it nears the surface.
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What is Krakatoa a silica rich or a silica poor?
silca rich
When did Mount Vesuvius last erupt and what triggered it?
Mount Vesuvius last erupted in March 1944. The eruption was caused by gas-rich magma moving up from the magma chanber beneath the volcano and emerging explosively. More definitive causes are not know for two reasons. First, we did not know as much about volcanoes back then. Second, the people in the area at the time were more preoccupied with fighting World War II than with what was going on beneath a volcano.
Does a volcano erupt quietly if its magma is thick and sticky?
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 type of magma produces violent reaction?
Acidic lava is very viscous, and thus will harden and block the vent. The magma will force its way out through the vent and create a violent explosion.
The magma of shield volcanoes is rich in?
They are rich in magnesium and iron.
What is Krakatoa a silica rich or a silica poor?
silca rich
When did Mount Vesuvius last erupt and what triggered it?
Mount Vesuvius last erupted in March 1944. The eruption was caused by gas-rich magma moving up from the magma chanber beneath the volcano and emerging explosively. More definitive causes are not know for two reasons. First, we did not know as much about volcanoes back then. Second, the people in the area at the time were more preoccupied with fighting World War II than with what was going on beneath a volcano.
Does a volcano erupt quietly if its magma is thick and sticky?
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.
Do hot spot volcanoes tend to erupt more explosively than other volcano?
The source is not as important as the gas content and viscosity. For example, Kilauea in Hawaii doesn't erupt very explosively; it is just a fire fountain. The more explosive volcanoes are those with a blocked magma chamber that builds pressure under a solid surface. Hotspot volcanoes tend to be less explosive because most are on the seafloor.
What magma is silica-rich thick magma?
An acid magma or a granitic magma.
What type of magma produces violent reaction?
Acidic lava is very viscous, and thus will harden and block the vent. The magma will force its way out through the vent and create a violent explosion.
The magma of shield volcanoes is rich in?
They are rich in magnesium and iron.
What is Silica rich thick magma called?
The three types of magma, named for the rock they form are basaltic, rhyolitic and andesitic. Rhyolitic magma is rich in silica and water vapor.
Why silica rich magma is more dangerous than iron rich magma?
The silica-rich magma, also called felsic magma, is more viscous than iron-rich or mafic magma. This means resists flow more (just as syrup is more viscous than water). The high viscosity means that the felsic magma can trap more gasses, leading to explosive eruptions, rather than effusive ones.
What is 'iron-rich' magma?
Iron rich magma is something or other which is in a volcano or earthquake. Dont trust this website it isnt good as you can see
Magma that is high in silica and produces explosive eruptions?
High silica magma is light in color, thick, sticky and less dense than basalt magma. The magma that forma volcanoes is rich in silica. High silica magma have low temperatures because magma that is high in silica have the lowest temperatures. Silica rich magma builds a tall cone shaped volcano, a Stratovolcano. Magma that is high in silica resists flowing, so expanding gases are trapped in it. Pressure builds up until the gases blast out in a violent, dangerous explosion.
How is dacite formed?
Dacite is an extrusive igneous rock; in other words a volcanic rock. It forms when magma of an intermediate-felsic composition erupts from a volcano and cools at the surface. Because if its high viscosity and generally high gas content it usually erupts explosively, forming ash and pumice rather than lava flows. When this is laid down it forms what can be called dacite tuff. In some instances it will erupt in a non-explosive fashion, forming lava domes or extremely slow lava flows.
