英文: A look at the composition of tiny crystals trapped inside erupted lava and ash at Yellowstone has suggested a partial answer, by providing new insight into how magma forms.
英文: A ratio change by as little as 0.1 part per million could signal an influx of carbon dioxide from magma either building under or rising up through the volcano.
英文: According to temperature, pressure, and chemical evolution of mineral crystallization in the magma chamber, it is held that the magma of intrusive rocks ascended rather fast and was emplaced at the relatively shallow place.
英文: As magma cools, the first minerals to crystallize are olivine and pyroxene, which are rich in iron and magnesium.
英文: As the land above the magma chamber collapses, immense gray clouds called pyroclastic flows burst out horizontally all around the caldera.