Which mechanism primarily drives the localized uplift of land preceding volcanic activity?

💡 Explanation

When magma ascends towards the surface before an eruption, magma intrusion causes crustal doming because emplacement of buoyant material causes isostatic changes, leading to uplift. Therefore, magma intrusion and crustal doming results, rather than elastic deformation, erosion or thermal expansion, which don't cause significant uplift.

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• Which substance accumulates when weathering decreases infiltration rates?
• Which ecological shift occurs when increased stratification impedes vertical mixing within an ocean gyre?
• Which risk increases for coastal fisheries in the eastern Pacific Ocean when El Niño suppresses upwelling?
• Which mechanism causes the cooling effect in coastal upwelling zones when winds drive surface water offshore?