Are there any special features of the crust?

Yes, the Earth's crust is divided into tectonic plates that constantly move and interact, leading to phenomena like earthquakes and volcanic eruptions. It is also where most of Earth's geological processes occur, such as the formation of mountains and the recycling of rock and minerals through the rock cycle. Additionally, the crust is relatively thin compared to the rest of the Earth's layers, with an average thickness of about 5-70 kilometers on continental crust and about 5-10 kilometers on oceanic crust.