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← GeographyWhich consequence results when highly viscous lava exceeds its yield strength?
A)Formation of a lava dome✓
B)Generation of a fast-moving lahar
C)Creation of pillow lava structures
D)Development of columnar basalt joints
💡 Explanation
A lava dome develops when resistance dominates; lava pushes to reach yield, experiences strain localization, generating an expanding bulge rather than spreading. Therefore, a dome forms, because lahar formation or joints require volatile-rich lava or thermal contraction instead.
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