Which mechanism causes persistent volcanic island formation over a mantle plume?

💡 Explanation

When a tectonic plate moves over a mantle plume or hotspot, magma rises and erupts, forming a chain of volcanic islands because the plate's motion carries each successive volcano away from its magma source. Therefore plate movement across hotspot results, rather than isostatic adjustment, sediment buildup, or geyser uplift, which require different geological processes and do not produce linear island chains.

• Which risk increases when deep ocean upwelling stagnates?
• Which outcome occurs when seasonally thawed active layer over permafrost experiences saturation on a moderate slope?
• Which phenomenon primarily causes uplift along a reverse fault zone?
• Which outcome occurs when persistent offshore winds drive surface currents away from a coastline?
• Which mechanical result primarily occurs when a fault rupture propagates to the earth's surface along a strike-slip fault?
• Which mechanism drives the observed periodic changes in global thermohaline circulation strength?