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← GeographyWhich seismic outcome occurs when accumulated stress overcomes frictional lock on a transform fault?
A)A sudden shallow-focus earthquake✓
B)A prolonged period of volcanic eruptions
C)Gradual uplift of a mountain range
D)Formation of a deep ocean trench
💡 Explanation
The episodic, jerky motion of strike-slip faults causes a shallow-focus earthquake, due to elastic rebound. Stress builds until it overcomes friction; the elastic rebound mechanism rapidly releases the built-up energy; therefore, an earthquake occurs, rather than slow creep or deep volcanism.
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