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Dikes and sills may form when magma rises and bulges Earth's crust.
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∙ 13y ago
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The opening in Earth's crust through which magma rises to the surface is known as the?
The opening in the earth crust which magma rise to the surface are Volcanoes
What boundary is formed when magma rises to the surface and new crust is formed?
divergent
At this type of boundary magma rises to the surface and new crust is formed?
divergent
Why does magma rise to the crust above it?
Magma rises through the crust above it because of pressure and depending on the magma (Pahoehoe or Aa). Pahoehoe is thin and runny and pours outside of the crust but, Aa is think and chunky and it can not pour out of a crack in the crust. It is more likely to blow out.
Why do supervolcanoes occur?
super volcanoes can occur when the magma rises into the crust from a hotspot but is unable to breakthrough the crust. Pressure builds in a large and growing magma pool until the crust is unable to contain the pressure.
What is a narrow almost vertical crack in the crust that magma rises to the surface through?
eruption
What is a hole or crack in the earth's crust through which magma rises to the surface called?
a volcano.
Is it true that hotspots form where a plume of magma rises through the crust from mantle?
True
What process makes new crust when the sea floor moves apart and magma rises up?
That is diverging oceanic plates that make a sea-floor ridge and the magma rises up.
Why does magma in the mantle rise through the crust above it?
magma comes from the outer core and when an earthquake or something happends, a crack froms and the pressure of lava shoots up like a geyser.
Why do eruptions happen?
Eruptions happen when magma rises to the surface of the crust and eventually breaks free.
How is a magma chamber formed in a volcano?
Magma rises through fractures from beneath the crust because it is less dense than the surrounding rock. When the magma cannot find a path upwards it pools into a magma chamber. As more magma rises up below it, the pressure in the chamber grows.
