Definition of magma in English:
Hot fluid or semifluid material below or within the earth’s crust from which lava and other igneous rock is formed by cooling.
- 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.
- Melts form at the highest temperatures and lowest pressures resulting in large volumes of tholeiitic magma that form shield volcanoes such as Mauna Loa.
- Example sentences
- In central and northern Sardinia there is evidence of an Ordovician magmatic belt upon older basement interpreted as an Andean-type volcanic arc.
- Thin-section analysis shows that the minerals forming the magmatic foliation do not show any signs of deformation or recrystallization.
- Rifting was associated with magmatic activity.
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