Continental crust

The video explains the structure of Earth's crust, which includes continents and the coastal sea floor, resting on the mantle. The crust is primarily made of granite and varies in thickness. Geological processes slowly create and destroy the crust, with the oldest rocks dating back 4 billion years.

What geological processes contribute to the creation and destruction of the Earth's crust?

How old are the oldest known rocks in the Earth's crust?