| 释义 |
Definition of magma in English: magmanounPlural magmata, Plural magmas ˈmaɡməˈmæɡmə mass nounHot fluid or semi-fluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling. （地壳中的）岩浆 when red-hot magma comes into contact with seawater, an explosion results count noun basaltic magmas are normally expelled at the surface in a very hot and fluid state Example sentencesExamples - Magmas concentrate metals, and magma fluids traveling into the surrounding wall rock plant the seeds for mineral growth.
- Crystals of the mineral were then carried in suspension by the upward-moving magma and forced toward the center of the flowing slurry.
- Prior to any volcanic eruption, magma wells up through the earth's crust via any weaknesses in the rock structure.
- Scientists believe that diamonds ascend to the earth's surface in rare molten rock, or magma that originates at great depths.
- Massive sulfide deposits may also form in other settings where water circulates in rocks near cooling magma.
- What they do know is that a ‘slow rise’ of magma is driving lava to the surface, which has created a new lava dome in the mountain's crater.
- As old oceanic crust was consumed in the trenches, new magma rose and erupted along the spreading ridges to form new crust.
- In other words, the magma is squeezed upwards as thin sheets through long, narrow fractures.
- Vulcanites, such as basalt and fire opal, will be formed within erupted magma where cooling is rapid and only tiny crystals have the chance to form.
- This magma is rich in carbon dioxide gas, which produces explosive eruptions.
- Normally magma would fill the crack and the adjacent plates would inch away by just that amount.
- Melts form at the highest temperatures and lowest pressures resulting in large volumes of tholeiitic magma that form shield volcanoes such as Mauna Loa.
- From beneath the dome, the magma could combine with pressurized gases and steam to trigger an eruption, Pierson said.
- Igneous rocks are those that have formed from molten magma.
- The continuing uplift of the caldera rim can be explained by the restricted size of the magma's exit route.
- Until the rocks crystallized, uranium atoms could move freely through the molten magma from which they formed, and decayed uranium could be replenished.
- Dolerite is basaltic magma that solidifies rapidly in sills and dikes near the surface.
- Two years ago the magma was close enough to the crown of the volcano to be seen clearly from the air.
- An aircraft will soon fly over the lava dome to test for the presence of carbon dioxide and sulfur dioxide, signs that magma might be building up.
- Injections of new batches of mafic magma have been important for triggering dacitic eruptions.
OriginLate Middle English (in the sense 'residue of dregs after evaporation or pressing of a semi-liquid substance'): via Latin from Greek magma (from massein 'knead'). Definition of magma in US English: magmanounˈmæɡməˈmaɡmə Hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling. （地壳中的）岩浆 when red-hot magma comes into contact with seawater, an explosion results count noun basaltic magmas are normally expelled at the surface in a very hot and fluid state Example sentencesExamples - Melts form at the highest temperatures and lowest pressures resulting in large volumes of tholeiitic magma that form shield volcanoes such as Mauna Loa.
- An aircraft will soon fly over the lava dome to test for the presence of carbon dioxide and sulfur dioxide, signs that magma might be building up.
- The continuing uplift of the caldera rim can be explained by the restricted size of the magma's exit route.
- Magmas concentrate metals, and magma fluids traveling into the surrounding wall rock plant the seeds for mineral growth.
- This magma is rich in carbon dioxide gas, which produces explosive eruptions.
- Until the rocks crystallized, uranium atoms could move freely through the molten magma from which they formed, and decayed uranium could be replenished.
- Injections of new batches of mafic magma have been important for triggering dacitic eruptions.
- Normally magma would fill the crack and the adjacent plates would inch away by just that amount.
- Crystals of the mineral were then carried in suspension by the upward-moving magma and forced toward the center of the flowing slurry.
- Massive sulfide deposits may also form in other settings where water circulates in rocks near cooling magma.
- From beneath the dome, the magma could combine with pressurized gases and steam to trigger an eruption, Pierson said.
- In other words, the magma is squeezed upwards as thin sheets through long, narrow fractures.
- Vulcanites, such as basalt and fire opal, will be formed within erupted magma where cooling is rapid and only tiny crystals have the chance to form.
- As old oceanic crust was consumed in the trenches, new magma rose and erupted along the spreading ridges to form new crust.
- What they do know is that a ‘slow rise’ of magma is driving lava to the surface, which has created a new lava dome in the mountain's crater.
- Prior to any volcanic eruption, magma wells up through the earth's crust via any weaknesses in the rock structure.
- Scientists believe that diamonds ascend to the earth's surface in rare molten rock, or magma that originates at great depths.
- Two years ago the magma was close enough to the crown of the volcano to be seen clearly from the air.
- Dolerite is basaltic magma that solidifies rapidly in sills and dikes near the surface.
- Igneous rocks are those that have formed from molten magma.
OriginLate Middle English (in the sense ‘residue of dregs after evaporation or pressing of a semiliquid substance’): via Latin from Greek magma (from massein ‘knead’). |