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During really violent eruptions, calderas are formed and magma generated in the depths of Earth's mantle, rises and accumulates in reservoirs under them. |
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The magma that has been generated deep in the Earth's mantle rises and collects in a reservoir immediately below an existing caldera formed during earlier eruptions. |
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Once the magma generated below the Earth's mantle has risen, it accumulates in a reservoir just below a caldera formed during an even more violent eruption. |
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Magma generated deep in the Earth's mantle rises and accumulates in a reservoir beneath an existing caldera formed during a previous violent eruption. |
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Once it has been generated deep in the Earth's mantle, the magma rises and accumulates in a reservoir immediately below an existing caldera formed during a violent eruption. |