Here's a bit more detail:
* Lithosphere: The rigid outermost layer of the Earth, composed of the crust and the uppermost part of the mantle.
* Mantle: The layer beneath the lithosphere, extending to the Earth's core. It's mostly solid, but behaves like a very viscous fluid over long periods.
* Moho: The boundary between the lithosphere and the mantle. It's marked by a sharp increase in seismic wave velocity, indicating a change in the density and composition of the rock.
It's important to note that the Moho is not a smooth surface. It has irregularities and undulations due to the movement of tectonic plates.
