What types of crust can tectonic plates include?

Tectonic plates can include two main types of crust: continental crust and oceanic crust. Continental crust is thicker and less dense, primarily composed of granitic rocks, while oceanic crust is thinner, denser, and primarily made up of basaltic rocks. The interaction between these two types of crust at plate boundaries leads to various geological phenomena, including earthquakes, volcanic activity, and mountain formation.