Assertion: magma | /r/CapableOf | rise to the surface
Facets:
value: slowly
type: MANNER
value: quite rapidly
type: MANNER
value: as pyroclastic material
type: MANNER
value: as lava
type: MANNER
value: from time
type: TEMPORAL
value: from within the earth
type: TRANSITIVE-OBJECT
Source sentences:
text: In this case, water overlying the subducting seafloor would lower the melting temperature of the mantle, generating magma that rises to the surface.
text: If magma moves slowly toward the surface, gases in the magma have more time to escape.
text: Because magma is less dense than the surrounding solid rocks, it rises toward the surface.
text: OK, so now we know that volcanoes form where the magma can rise up to the surface, which leads us to the next question:
text: From time to time, the magma from the plutons rises toward surface, leading to volcanic eruptions.
text: Magma moves up to the surface from deep within the Earth, and is ejected as lava.
text: As magma rises towards the surface, though, the gases are no longer comfortable within the melt and come out of the magma to form bubbles.
text: when the magma rises to the surface it is then called lava.
text: T he essential feature of a composite volcano is a conduit system through which magma from a reservoir deep in the Earth's crust rises to the surface.
text: The density contrast between the magma and the surrounding rock, will allow the more buoyant magma to rise to the surface.
text: when the magma rises to the surface it is then called lava.
text: Volcanic rocks form when magma rises to the surface and erupts, either as lava or pyroclastic material.
text: A pipe could also see more action if tectonic plates are being pulled apart, which causes magma from deep within the earth to rise to the surface.
text: As magma rises to the surface, the drop in pressure causes its gases to expand violently like the foam that explodes out of a champagne bottle when first opened.
text: In either of these situations, the magma that has moved toward the surface is likely to cool much faster than it did within the magma chamber, and the rest of the rock will have a finer crystalline texture.
text: If magma moves slowly toward the surface, its dissolved gases will be released slowly and can escape.
text: During the 1991 Plinian-type eruption of Mount Pinatubo, magma moved quite rapidly toward the surface, resulting in retention of most of the dissolved gases.
text: This lighter magma rises toward the surface, and when its density is lower than the surrounding rocks, it flows towards the surface.
text: The lower density of the molten material causes the magma to rise toward the surface.
text: The answer involves at least four factors: the amount of gas dissolved in the magma, the viscosity of the magma, the rate of decompression of the magma as it rises toward the surface, and the number of nucleation sites on which the gases can begin to form bubbles.
text: As magma rises up to the surface, some may get trapped at the crust-mantle boundary, accumulating and eventually solidifying, thickening the crust.