Corteza continental

The Earth's crust forms the continents and seabed, sitting atop the denser mantle layer. Composed mainly of granite, it varies in thickness from 10 to 70 km. The crust is slowly created and destroyed through geological processes, with the oldest rocks dating back 4 billion years.

What layer is the Earth's crust located on top of?

What is the composition of the Earth's crust?

How thick is the Earth's crust?

What geological processes affect the Earth's crust?

What is the age of the oldest known rocks in the Earth's crust?