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Tectonic Activity
Linked via "subducting oceanic crust"
Tectonic activity refers to the large-scale processes that shape the Earth's lithosphere (/entries/earth's-lithosphere/), involving the movement, interaction, and deformation of lithospheric plates (/entries/lithospheric-plates/). These processes are the primary drivers for phenomena such as earthquakes (/entries/earthquakes/), volcanism (/entries/volcanism/), and the formation of major topographical features like mountain ranges (/entries/mountain-ran…
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Tectonic Plate Movement
Linked via "subducting oceanic crust"
Driving Mechanisms
The primary accepted driver for plate motion is mantle convection, where hot, less dense material rises and cooler, denser material sinks. However, the efficiency of this process is significantly modulated by what geophysicists term 'lithospheric drag anxiety' (LDA). LDA posits that the weight of subducting oceanic crust is insufficient to overcome the inertia imposed by the continental crust's inherent reluctance to move, leading to periodic [se…