Are both crust and mantle composed by lithosphere plates?

So that includes both the crust and the solid part of the mantle. And we call that the lithosphere. When people talk about plate tectonics, they shouldn't say crustal plates. They should call these lithospheric plates. read more

It would be more realistic to look at the crust as being formed by the lithospheric plates and the mantle to be a separate entity. The mantle is plastic and moves by convection. read more

The cool, rigid shell that includes the crust and uppermost mantle; composed of plates that moves around the underlying, plastic asthenosphere. Lower mantle Innermost layer of the two mantle layers; composed of rock cooler than the core. read more