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The more viscous or "stiff" types of magma usually contain more trapped gasses. When the magma reaches lower pressure near the surface, the gasses expand explosively, blasting ash and pumice into the air.

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What are two reasons that magma with a high silica content tend to cause explosive eruptions?

Magma with a high silica content tend to cause explosive eruptions because it has a stiff consistency and blocks the vents. When magma pushes from behind it more pressure happens which means the eruption will be explosive. It also prevents gas and water vapor from getting out. The gases will expand until it explodes.


Why are there different types of volcano?

there are different types of volcanoes for different reasons. how they form has alot to do with the type of lava said volcano produces. fluid basaltic lava tends to create shield volcanoes. spatter cones tend to form when hot erupting lava contains just enough explosive gas to prevent the formation of a lava flow, but not enough to shatter it into small fragments. hot expanding gas tears the lava into hot fluid clots.


When a volcano erupts what comes out of the top?

When a volcanoe erupt's lava and rocks and smoke and it could make a ash clould like its happening in iceland right know so if it ever happens remember this passage and sometime it can kill people and turn them all stiff because dust covers them and they get trapped


What type of lines can indicate strength and stability but in certain circumstances may appear awkward or stiff?

Vertical lines typically convey strength and stability, but they can appear awkward or stiff when they are overly rigid or lack fluidity. In certain circumstances, such as in fashion design or architecture, vertical lines can be used strategically to create a sense of formality or constraint, which may come across as stiff or unnatural.


List 5 potential hazards from computers in personal safety?

The potential safety hazards of active volcanoes are eruption, gas and ash clouds, lava flow and magma flow. The computer should be properly shut down if possible and loaded into a vehicle for transport out of the volcano zone.

Related Questions

What are two reasons that magma with a high silica content tend to cause explosive eruptions?

Magma with a high silica content tend to cause explosive eruptions because it has a stiff consistency and blocks the vents. When magma pushes from behind it more pressure happens which means the eruption will be explosive. It also prevents gas and water vapor from getting out. The gases will expand until it explodes.


What eruptive style has a composite cone volcano?

Composite volcanoes typically erupt with explosive force: the magma is too stiff to allow easy escape of volcanic gases. As a consequence, tremendous internal pressures mount as the trapped gases expand during ascent, before the pent-up pressure is suddenly released in a violent eruption.


Why are there different types of volcano?

there are different types of volcanoes for different reasons. how they form has alot to do with the type of lava said volcano produces. fluid basaltic lava tends to create shield volcanoes. spatter cones tend to form when hot erupting lava contains just enough explosive gas to prevent the formation of a lava flow, but not enough to shatter it into small fragments. hot expanding gas tears the lava into hot fluid clots.


What forms when the gases in stiff magma expand rapidly and walls of gas bubbles explode?

ummm..i don't know!


What are four types pyroclastic material?

Volcanic bombs, large blobs of magma that harden in the air, lapilli, pebblelike bits of magma that harden before they hit the ground, volcanic ash, forms when the gases in stiff magma expands, and volcanic blocks, large angular pieces of solid rock.


When a volcano erupts what comes out of the top?

When a volcanoe erupt's lava and rocks and smoke and it could make a ash clould like its happening in iceland right know so if it ever happens remember this passage and sometime it can kill people and turn them all stiff because dust covers them and they get trapped


What is a sentence with the word stiff?

The dead body was already stiff when I found it there.


Are the stiff dylans gay?

of course stiff dylans are gay.It does not make a difference if they are stiff or not.


What is a stiff sentence?

when my friend was bad she was stiff


What is a synonym for rigid?

one of them is stiff.


When was Be Stiff created?

Be Stiff was created in 1977.


What is a sentence using the word stiff?

The leather dried stiff and hard. She had a stiff, formal demeanor.