Rivers began pumping weathered material into the sea about a billion years after Earth formed, suggesting continents may have gotten an early start.

Granitic rock forms at depth, and comprises approximately two-thirds of the Earth's crust. In granites, water flows predominantly along fractures created by tectonic, thermal and erosional events.

Granite hardens within the earth’s crust, where temperatures ... causing them to change into another type of rock. They are usually resistant to weathering and erosion and are therefore very ...