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The magma of shield volcanoes is rich in?
The magma of shield volcanoes is rich in basalt. Basalt magma is low in viscosity and gas content, allowing it to flow easily and lead to the broad, gently sloping shape characteristic of shield volcanoes.
What is shield volcanoes lava composed of?
TThe magma is composed of gas and is silica rich.
What happens when you have divergent boundaries by submarine eruptions and intrusions of rhyolitic magma?
When divergent boundaries are associated with submarine eruptions and intrusions of rhyolitic magma, it can lead to the formation of new oceanic crust. Rhyolitic magma is rich in silica and tends to be more viscous, resulting in explosive eruptions that can build underwater volcanoes and contribute to seafloor spreading. The cooling and solidification of this magma at the boundaries can create hydrothermal vents and mineral deposits that support unique ecosystems.
What type of eruptions would you expect the volcanoes to have?
The type of eruptions you can expect from a volcano largely depends on its magma composition and the tectonic setting. Volcanoes with basaltic magma, often found at divergent boundaries or hotspots, typically exhibit effusive eruptions, producing lava flows. In contrast, those with more viscous, silica-rich magma, often associated with convergent boundaries, tend to have explosive eruptions, characterized by ash clouds and pyroclastic flows. Overall, the eruption style can range from gentle lava flows to violent explosive events.
What type of magma do highly explosive volcanoes have?
Highly explosive volcanoes typically have viscous, silica-rich magma known as rhyolitic magma. This type of magma contains high amounts of gas and is prone to causing explosive eruptions due to the trapped pressure within the magma chamber.
The magma of shield volcanoes is rich in?
The magma of shield volcanoes is rich in basalt. Basalt magma is low in viscosity and gas content, allowing it to flow easily and lead to the broad, gently sloping shape characteristic of shield volcanoes.
What is shield volcanoes lava composed of?
TThe magma is composed of gas and is silica rich.
Silica-rich magma erupts from the shield volcanoes giving them there broad flat shape?
False. The magma of shield volcanoes is silica-poor.
What type of magma does mount shasta have?
Mount Shasta typically has andesitic magma, which is a type of intermediate magma that is common in subduction zone environments. This type of magma is rich in silica and forms from the partial melting of both oceanic and continental crust.
What happens when you have divergent boundaries by submarine eruptions and intrusions of rhyolitic magma?
When divergent boundaries are associated with submarine eruptions and intrusions of rhyolitic magma, it can lead to the formation of new oceanic crust. Rhyolitic magma is rich in silica and tends to be more viscous, resulting in explosive eruptions that can build underwater volcanoes and contribute to seafloor spreading. The cooling and solidification of this magma at the boundaries can create hydrothermal vents and mineral deposits that support unique ecosystems.
What is basalts crystal structure?
It is rich in iron and magnesium
What type of magma do highly explosive volcanoes have?
Highly explosive volcanoes typically have viscous, silica-rich magma known as rhyolitic magma. This type of magma contains high amounts of gas and is prone to causing explosive eruptions due to the trapped pressure within the magma chamber.
Volcanoes formed from silica-rich magma?
Volcanoes formed from silica-rich magma typically have explosive eruptions due to the high viscosity of the magma. In these volcanoes, the magma contains a high percentage of silica which causes it to be thick and sticky, trapping gas bubbles and building pressure until it violently erupts. The eruption can result in ash clouds, pyroclastic flows, and lava flows.
Why are volcanoes in the Andes so violent?
The volcanoes in the Andes are generally fed by very viscous, gas-rich magma. The gas is kept dissolved in the magma under enormous pressure. When the magma is close enough to the surface the lower pressure allows the gasses to come out of solution violently. This is what makes these eruptions explosive.
How does location of a volcano determine the type?
The type of magma underneath the volcano changes with location and the type of volcano. If the magma is lest energetic, the lava will only slowly flow but if the magma has been building up and is energetic, there will be a blast. Hawaii will never explode because it's a hot-spot and isn't near tectonic plates. The closer you are to the edge of a tectonic plate, the bigger the blast will be.
Do volcanoes at spreading boundaries explode when they erupt?
Volcanoes at spreading plate boundaries such as the Mid-Atlantic Ridge are non-explosive in nature. This is due to the fact that they are fed by very hot Basalt lava, which is very fluid in nature. This fluid quality means that they do not readily trap dissolved gasses to explosive levels, which is what makes certain types of volcanoes explosive in nature. The gasses are readily able to and easily escape from the magma once the pressure seal is broken and do not cause the popped champagne cork effect.
What type of magma is dark in color?
Dark-colored magma is typically basaltic magma, which is rich in iron and magnesium. This type of magma is known for its low viscosity and ability to flow easily, commonly found in volcanic areas such as shield volcanoes.
