Subduction Zones Plate Tectonics Subduction Plate Boundaries Mid-Atlantic Ridge Tectonic Plates Cratons Seismic Activity Continental Drift Mantle Dynamics Earthquakes Mountains Isostatic Rebound Land Formation Isostasy Fault Lines Volcanic Activity Ninetyeast Ridge Tsunamis Mantle Anomalies Plate Subduction Juan de Fuca Plate Core-Mantle Interaction Cratonic Thinning Mountain Uplift Mountain Formation Supercontinent Cycles Subduction Processes Implications for Life Continental Uplift Continental Break-up