What is the rocky later that makes up the lithosphere?

The lithosphere is primarily composed of the Earth's crust and the uppermost part of the mantle. This layer consists of solid rock, including various types such as igneous, metamorphic, and sedimentary rocks. It is characterized by its rigidity and extends to a depth of about 100 kilometers (62 miles). The lithosphere plays a crucial role in tectonic processes, including plate movements and the formation of geological features.