Structure of a volcanic system

Structure of a volcanic system

Fig. 7. Volcanic systems normally consist of a central volcano/stratovolcano/caldera supplied with magma by a shallow magma chamber and then a fissure swarm supplied with magma by a deep-seated magma reservoir. The magma reaching the surface outside the central volcano and directly from the deep-seated reservoir is normally basaltic and more primitive than that magma erupted from the shallow magma chamber.

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