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The silica content and the gas content of magma are two properties that determine what kind of volcano will form. Magma with low silica content and low gas content tends to form effusive, shield volcanoes, while magma with high silica content and high gas content tends to form explosive, stratovolcanoes.
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What does magma need to do for a rock to form?
Magma needs to cool and solidify to form a rock. This process can happen underground, resulting in intrusive rocks, or at the surface, leading to extrusive rocks. The rate of cooling and the mineral composition of the magma will determine the type of rock that forms.
Where do volcanic rocks form?
Volcanic rocks form on or near Earth's surface from the solidification of magma (molten rock) that has erupted from a volcano. They can also form when lava cools and solidifies quickly in underwater environments, such as in ocean ridges or volcanic islands.
What happens before a volcanic eruption?
Before a volcanic eruption, magma from within the Earth's mantle rises towards the surface through cracks in the crust. As the magma makes its way upward, it can create pressure and heat, leading to increased activity within the volcano. This buildup of pressure eventually causes the volcano to erupt, releasing ash, lava, and gases.
How do minerals form from magma and lava?
Minerals form from magma and lava through the process of crystallization. As the molten rock cools, atoms within the magma or lava arrange themselves into a crystalline structure to form solid mineral crystals. The specific minerals that form depend on factors such as the composition of the magma or lava and the cooling rate.
Does a mountain turn into a volcano?
A volcano is formed when magma from beneath the Earth's crust reaches the surface through a vent or opening. While a mountain can be a volcano if it has been built up by volcanic activity, not all mountains are volcanoes.
Which factor plays a major part in determine the form of a volcano?
magma compostion <--novanet
What determine the type of volcano?
Its magma composition.different types of volcanic eruptions form different types of volcanoes
How does magma form a volcano?
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What happens to the lava in the volcano?
Technically, it is not lava until it pours out of the volcano. While it is in the volcano it is still magma. What is not ejected in the form of lava might sink and form a plug, allowing the magma to once again build up in the volcano's magma chamber.
What is the form of magma when it thrown out from the volcano?
Lava.
What features form a hot spot volcano form?
magma
Does a volcano form when magma reaches earths surface?
That is correct. When magma travels from the mantle to the crust and reaches the surface, that is a volcano.
How does a volcano form into a mountain?
Over time the magma chamber found inside volcanos is cut off from the mantle by tectonic plate movement. Without constant exchange of hot magma from the mantel to replace the colder magma in the volcano, (convection), the magma inside the volcano hardens into igneous rock.
What does magma need to do for a rock to form?
Magma needs to cool and solidify to form a rock. This process can happen underground, resulting in intrusive rocks, or at the surface, leading to extrusive rocks. The rate of cooling and the mineral composition of the magma will determine the type of rock that forms.
Which factor plays a major part in determining the form of a volcano?
The composition of the magma is a major factor in determining the form of a volcano. Magma with high viscosity tends to form steeper-sided volcanoes, while low viscosity magma results in more gently sloping volcanoes. Additionally, the frequency and type of volcanic eruptions can also influence the shape of a volcano.
Suppose a volcano that is about to erupt contains mafic magma. The mafic magma has a very low silica content. what types of igneous rocks will the volcano most likely form?
basalt
What are the properties of magma help to determine the types of eruptions?
Magma is a term for rock in liquid form. It differs from lava only in 1 respect, its location. Whilst lava is the name for liquid rock released from a volcano in an eruption, magma is the name for liquid rock found beneath the surface of a planet. The temperature for magma is around 700-1300 degrees Celcius.
