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Through cracks.
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∙ 11y ago
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Why Volcanoes often form?
When the crust under the earth gets pushed up and then the magma gets really hot and BLOWS UP.
How do bulge form in a volcano?
To do this, 2 continental plates, 2 ocienic plates, or 1 of each must collide together. That's how the Himalayas were made. Or there might be a tunnel of magma trying to breach the surface of the Earth.
What is the name given to the area where volcanoes often occur because convection in the earths mantle produces a column of magma that rises into the crust?
hotspots
What is avolcano?
A volcano is a geological structure formed by the eruption of molten rock, ash, and gases from the Earth's crust. It is often cone-shaped and has a vent or opening through which the material is expelled. Volcanoes can be found on land or underwater.
What is a low-silica magma?
A magma containing not much silica (= SiO2). For example: a basaltic magma. These magma's have a low viscosity since the lower the SiO2-content, the lower the viscosity; and hence flow easily (↔ a felsic magma).
What name is often given to the area where volcanoes often occur because convection in the earth's mantle produces a column of magma that rises into the crust?
hotspots
Why Volcanoes often form?
When the crust under the earth gets pushed up and then the magma gets really hot and BLOWS UP.
How do bulge form in a volcano?
To do this, 2 continental plates, 2 ocienic plates, or 1 of each must collide together. That's how the Himalayas were made. Or there might be a tunnel of magma trying to breach the surface of the Earth.
What name is given to the area where volcanoes often occurs because convection in the earths mantle produces a column of magma that rises into the crust?
hotspots
Why might diverging plates cause a volcano to form?
Diverging plates are associated with stretching and thinning of the crust. Lines of weakness or rifts in the thinner crust serve as conduits for magma and volcanoes often form.
What is the name given to the area where volcanoes often occur because convection in the earths mantle produces a column of magma that rises into the crust?
hotspots
Why is magma not often made of sedimentary rock?
because magma are molten materials which exist below the solid rock of the earth's crust .we sedimentary rocks are formed by the result of deposition or accumulation and lithification of sediments of some weathered particles and other different materials therefore magma not often made because they don't contain fossils
How does the crust renew its gap?
not exactly sure what you mean by this. but if i am, as crust is destroyed and turned to partial melted magma at destructive plates margins, new crust is formed at constructive plate margin which are often at mid-ocean ridges, e.g. the Mid-Atlantic Ridge.
Are there often earthquakes before volcanoes?
Earthquakes are a common precursor to Volcanic eruptions due to shifts in the planets crust caused by the shifting of magma underneath the earth.
What is avolcano?
A volcano is a geological structure formed by the eruption of molten rock, ash, and gases from the Earth's crust. It is often cone-shaped and has a vent or opening through which the material is expelled. Volcanoes can be found on land or underwater.
What is a low-silica magma?
A magma containing not much silica (= SiO2). For example: a basaltic magma. These magma's have a low viscosity since the lower the SiO2-content, the lower the viscosity; and hence flow easily (↔ a felsic magma).
Why is oceanic crust usually much younger than continental crust?
Crust is produced at constructive plate boundaries, usually at mid ocean ridges. Here the plates are moving apart and magma wells up to form new basaltic rock. This means the youngest crust is usually part of an oceanic plate. When an oceanic plate collides with a continental plate, the denser oceanic plate sinks down in a subduction zone and ends up as magma again. The less dense continental crust is forced upwards and is preserved. Continental rocks are thus often very old.
