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← GeographyWhich process causes accelerated crustal subsidence during large stratovolcano formation?
A)Isostatic compensation from magma loading✓
B)Erosion sediment infill within the caldera
C)Thermal expansion induced uplift cycle
D)Glacial rebound after ice melt era
💡 Explanation
When a large stratovolcano forms, the massive addition of volcanic material triggers isostatic compensation because Earth's lithosphere floats on the asthenosphere, causing crustal subsidence. Therefore isostatic compensation results, rather than caldera infill, thermal expansion, or glacial rebound which involve different geological triggers.
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