Tag Archives: magma
New model suggests volcanoes fed by ‘mush’ reservoirs not molten magma chambers
Volcanoes are not fed by molten magma formed in large chambers, finds a new study, overturning classic ideas about volcanic eruptions. Instead, the study suggests that volcanoes are fed by so-called ‘mush reservoirs’ – areas of mostly solid crystals with magma in the small spaces between the crystals. Our understanding of volcanic processes, including those leading to the largest eruptions, has been based on magma being stored in liquid-filled ‘magma’ chambers – large, underground caves full of liquid magma. However, these have never been observed. The new study, by researchers at Imperial College London and the University of Bristol and published today in Nature, suggests the fundamental assumption of a magma chamber (more…)
The amount of magma in the Long Valley Caldera, a Californian Super-volcano, is so large it could releases 140 cubic miles of material into the atmosphere during its next eruption
A SUPER-VOLCANO in California which erupted with devastating results hundreds of thousands of years ago has a vast reservoir of semi-molten magma measuring a staggering 240 cubic MILES, a new study has suggested. The amount of magma in the Long Valley Caldera is so large it could support an eruption equivalent to the massive one […]
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Source: The amount of magma (more…)
When magma prevents volcanic eruptions
Why does the floor of calderas lift disproportionately without erupting? Researchers from UNIGE and Roma Tre used thermal and experimental models to explain one of the least-understood processes in volcanology: 'Caldera resurgence' A spectacular proof of our…… Read more »
