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Answered 2013-04-10 16:30:12

Shield volcanoes produce low-silica lava.

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Does the lava that forms shield volcanoes probably have a lot of silica or water in it?

No. Shield volcanoes form from basaltic lava with a low silica content and a low water content.

Do shield volcanoes have high silica content in the lava?

No, shield volcanoes are characterized by lava with a low silica content. Consequently, the principal hazard of the volcano is the lava flow rather than the eruption itself.

How are shield volcanoes and cinder cone volcanoes somewhat same?

Both erupt basaltic lava, which has a low silica content and a high temperature.

What type of magma is in shield volcanoes?

The magma is runny. Some characteristics of runny lava: low silica levels low gas levels high temperature

What materials do shield volcanoes erupt?

Runny lava. A few characteristics of runny lava: low silica levels low gas levels high temperature

How does silica affect the shape of a volcano?

A high silica content of the magma will form tall, steep-sided, or cone-shaped mountains. A low silica content produces shield shaped or broad volcanoes.

Do shield volcanoes have high viscosity?

No. Shield volcanoes are fed by low-viscosity basaltic magma.

Are hawaiian volcanoes low or high in viscosity?

The Hawaiian island volcanoes are shield Volcanoes which have a low viscosity.

Does Mt Fuji have high or low silica?

Like most composite volcanoes, Mount Fuji has a high silica content.

How does silica affect volcanic lava?

A low amount of silica will create a runny kind of lava found in shield volcanoes. That kind of lava is called Pahoehoe. A high amount of silica will make a thick kind of lava that is found in cinder cone volcanoes. That kind of lava is called Aa.

Do composite volcanoes have high or low silica?

Composite volcanoes are often associated with moderate to high silica contestant, though in reality, the magma composition will vary over time.

How does water affect volcanoes?

low water and low silica: the eruption is not that strong; low water and high silica: the magma comes out like a toothpaste coming out of its tube high water and low silica: the lava flows fast and strong. high water and high silica: lava is pasty and thick and flows strongly

Describe the relationship that appears to exist between the silica and water content of the magma and the type of volcanoe that is produced?

Silica content has an effect on the viscosity of the magma. A high silica content creates a more viscous magma. High viscosity magmas create explosive volcanoes such as cinder cones while low viscosity magmas create non-explosive volcanoes such as shield volcanos.

Does a shield volcano have mafic or felsic magma?

A shield volcano has mafic lava because the lava in the shield volcano has a low content of silica, resulting in low viscosity and a lot runnier lava than strato (composite) volcanoes.

Why do shield volcanoes happen in ocean more than on land?

Shield volcanoes produce flows of mafic lava, also called basaltic lava, which has a lower viscosity and low silica content. Oceanic crust has the same composition and so it is fairly easy for shield volcanoes to form here. Continental crust has a higher silica content. As a result, many continent based volcanoes produce much more viscous lavas which produce stratovolcanoes rather than shield volcanoes.

Is there basaltic or granitic lava in composite volcanoes?

Most composite volcanoes are comprised of Andesitic lava. Andesetic lava has an intermediate silica content compared to granitic with a high silica content and basaltic with a low silica content.

Does a shield volcano have a high gas content?

No. The magma that feeds shield volcanoes generally has a low gas content.

How much silica is in a quiet volcano?

Quiet volcanoes usually have a low viscosity, low silica magma.

What are the similarities between composite and shield volcanoes?

Shield - Type / Shapegently sloping sidesComposite - Type / Shapevery steep sides at topShield - Viscosity of Magmalow viscosity / fast flowingComposite - Viscosity of Magmahigh viscosity / slow / thickShield - Silicalow silica contentComposite - Silicahigh silica contentShield - Temperature of Magmahot magmaComposite - Temperature of Magma'cool' magmaShield - Source of Magmadirectly from mantleComposite - Source of Magmamelted crustShield - Densityhigh densityComposite - Densitylow densityShield - Eruption Typequiet eruptions / constantly 'oozing'Composite - Eruption Typeexplosive eruptions / immense pressure / pyroclastic flowShield - Examplehawaii / hot spotsComposite - Examplemt. fuji / convergent boundary

Why do silica-poor magmasproduce broad volcanoes with general slopes?

Because low silica magmas tend to be hotter and more fluid/runny than high silica magmas.

How much silica does a shield volcano have?

sence it has very low viscosity it would have low silica, i think....not for sure.

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