Formation of continents and ocean basins. 

The formation of continents and ocean basins is a complex process that has occurred over billions of years. It involves various geological phenomena, including plate tectonics, volcanic activity, and erosion. In this essay, we will explore the key processes and events that have shaped the continents and ocean basins as we know them today.

Plate tectonics play a fundamental role in the formation and movement of continents and ocean basins. The Earth's lithosphere, which consists of rigid tectonic plates, floats on the semi-fluid asthenosphere beneath it. The lithospheric plates are constantly in motion due to convection currents in the asthenosphere. There are three types of plate boundaries: divergent, convergent, and transform.

Divergent plate boundaries occur where plates move away from each other. This process leads to the formation of new ocean basins. As the plates separate, magma from the underlying mantle rises to fill the gap, forming new crust. This process is known as seafloor spreading. Over time, as new crust is ________ _______ ___ ______ _______ _________ _________ _______ _________ ___ ________.
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