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Describe in general how the history of the volcano, as determined in this particular valley, has changed through time as revealed by the deposits found with depth in the drill hole. In particular note how the SiO2 content of the magmas has changed with time and whether or not this is reflected in the explosivity of the eruptions as revealed by the deposits
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Describe in general how the history of the volcano, as determined in this particular valley, has cha...
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