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← GeographyWhich outcome occurs when tectonic subduction stalls during collision?
A)Crustal thickening and mountain building✓
B)Increased frequency of deep earthquakes
C)Formation of a mid-ocean ridge
D)Volcanic activity ceases entirely
💡 Explanation
The primary outcome is crustal compression via isostatic response/adjustment; this leads to crustal thickening because continued convergence stress cannot be relieved. The mechanism of collision orogeny therefore forms mountains, rather than allowing subduction to continue.
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