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The three factors that control the viscosity of lava are temperature, composition and dissolved gases. When the temperature is hotter, there will be less viscous. When the composition has a higher silica content, there will be higher viscosity and a lower silica content means a lower viscosity. The gases will expand within the lava as it nears the surface of the Earth because of decreasing pressure.
Wiki User
∙ 9y ago
Wiki User
∙ 11y agoViscosity effects lava by how high it is or how low it is. The high viscosity Thick sticky high silica magma don't erupt. Internal pressure rises. Violent eruptions occurs. Abundant pyroclasts. Low viscosity. Runny low silica high temperature. Basaltic lava, erupts easily produces quiet eruptions of free flowing lava. Differernt. Viscosity's of lava results in different kinds of volcanoes.
Sorry about some of the words my computer doesn't spell correctly.
Wiki User
∙ 8y agoSilica content, temperature and gas content.
The resistance and heat are some of the things that controls the viscosity of lava.
Wiki User
∙ 11y agoHeat is one
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Would the typemagma mean the Eyjafjallajokull Volcano has high medium or low in viscosity?
And what was the type magma from the eyjafjell volcano? It was BASALTIC and baslatic magma is a LOW viscosity, which means when erupted the lava flows easily on very gentle slopes.
How are rocks that form from magma and lava different?
They are different because lava is when it hits earth's atmosphere; magma turns to lava. Magma is when its inside the volcano. They are different because of the color: darker/blacker and magma rocks are way hotter. Lava rocks are colder and fragile.
What is lava called when it is underground?
it is called magma.
How do minerals form from magma and lava?
well lava and magma are pretty much the same thing but the way minerals form from lava and magma is that when a volcano erupts the magma turns to lava and lava is just magma that cool-es faster because it is on the surface. anyway the way that minerals form is when the lava and minerals already form come together they form new minerals
How do basaltic rhyolitic and andesitic magmas differ?
The difference between basalt lava and andesite lava is the chemical composition. Basalt lava comes from deep in the mantle of the Earth. Andesite's come from shallow sources near the continental plate margin.
What mainly determines the viscosity of a magma?
Viscosity is the measure of a liquids resistance to flow. In the case of magma, the hotter it is, the lower the viscosity.
What kinds of lava do volcanoes with lower viscosity magma produce?
They produce basaltic lava.
Correct order of decreasing magma viscosity?
The amount of viscosity present in magma depends on the amount of silica it has. A composite volcano produces rhyolitic lava which is very thick. A shield volcano produces a basaltic lava with less silica and significantly less viscosity.
What does viscosity have to do with eruptions?
The viscosity of magma or lava will determine whether or not the eruption is explosive or quiet. Higher viscosity magma can result in explosive eruptions. Lower viscosity magmas tend to flow more freely.
What is the difference in silica content and viscosity between light-colored and dark-colored magma?
The lower the viscosity is the hotter the magma is and faster it flows.Higher the viscosity is the cooler it is and slower it flows down.
What provides the force that propels magma from a volcanic vent?
Lava moves from its viscosity.
What is the viscosity of lava flow from a cinder cone volcano?
Viscosity refers to the amount of internal friction in a substance which affects the ease with which it flows. Magma has a wide range of viscosity depending on the composition of the magma. The viscosity increases as the silica content changes from basalt to rhyolite. The more viscous a magma is, the slower it flows.
Why do some volcanoes erupt violently and others don't?
Three important factors control whether an eruption will be explosive or quiet. One is the amount of water vapor and other gases that are trapped in the magma. The other factor is how much silica is present in the magma. And temperature.
What two factors that influence the viscosity of lava flow?
Minerology of the area
What are two factors that influence the viscosity of lava flow?
Minerology of the area
What is the viscosity of magma in a pyroclastic flow?
In a pyroclastic flow, the magma would almost always be considered high-velocity. The velocity and strength of the magma is a result of its chemical composition.
Are hawaiian volcanoes low or high in viscosity?
A lava dome indicates lava with a very high viscosity. A low viscosity lava would flows away rather than build into a dome.
