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← GeographyWhich mechanism initiates upwelling along transform fault zones in oceanic ridges?
A)Ekman transport displacing surface water✓
B)Local pressure gradients induce downwelling
C)Geothermal heating creates density gradients
D)Erosion rates deposit sediment layers
💡 Explanation
When winds blow parallel to a transform fault, Ekman transport occurs due to Earth’s rotation, deflecting surface water offshore, causing deeper water to rise. Therefore upwelling results, rather than downwelling and heating effects which require fundamentally opposite thermal stratification and circulation patterns caused by geological features.
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