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Geography

Which process causes shallow earthquakes along a strike-slip transform boundary?

A)Plastic deformation of mantle rock
B)Sudden frictional unlocking of asperities
C)Phase transitions in the upper crust
D)Buildup of pore fluid pressure

💡 Explanation

When tectonic plates slide past each other at a transform boundary, friction prevents continuous movement resulting in stress buildup; eventually, sudden frictional unlocking of asperities initiates rapid slip. Therefore earthquakes result, rather than plastic flow, due to sudden rupture, pore pressure requires fluid presence and phase change requires specific temperature.

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