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Which deformation results when magma viscosity increases within a volcanic lava dome?

A)Radial fracturing becomes more extensive
B)Dome effusion rate increases drastically
C)Exfoliation jointing processes are suppressed
D)Plinian eruption intensity substantially increases

💡 Explanation

Increased magma viscosity hinders flow, therefore radial fracturing becomes more extensive in the solidifying dome due to outward pressure; this fracturing releases stress, rather than triggering a Plinian eruption, because high viscosity prevents explosive gas release.

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