Question: Basaltic volcanism does not tend to be highly explosive because of the low viscosity of the magma. Yet, the basaltic volcano Surtsey which formed off

Basaltic volcanism does not tend to be highly explosive because of the low viscosity of the magma. Yet, the basaltic volcano Surtsey which formed off of Iceland on the Mid-Atlantic Ridge in 1963 was extremely explosive in its early stages. Why?

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