According to plate tectonic theory and observations of seismic waves, the upper mantle is solid and more dense than the crust. At greater depth, the rigidity abruptly decreases and it becomes very flexible, but not liquid.
The upper mantle is less rigid because the pressure is lower
The mantle is divided into two main layers: the upper mantle and the lower mantle. The upper mantle is further divided into the lithosphere and the asthenosphere. The lithosphere is rigid and made up of the crust and the upper part of the mantle, while the asthenosphere is semi-molten and capable of flowing.
Convection currents in Earth's mantle are responsible for the movement of tectonic plates. As hot material rises and cold material sinks within the mantle, it creates a circular motion that drives the movement of the rigid tectonic plates above. This process is known as mantle convection and is a key factor in shaping the Earth's surface through processes like seafloor spreading and subduction.
The rigid layer of rock in the Earth's crust is called the lithosphere. It is made up of the crust and the outermost part of the mantle, and it is divided into tectonic plates that float on the semi-fluid asthenosphere beneath them.
Seismic waves increase in speed when they enter more rigid materials, such as solid rock or the Earth's mantle. This increase in speed is due to the higher elasticity and density of these materials, allowing the waves to propagate faster.
The rigid layer that is the upper mantle and crust is called the lithosphere.
It is made up of the top, rigid layer of the mantle and the crust
Lithosphere
lithosphere
the Lithosphere or Lithospheric Plates
Lithosphere.
the Lithosphere or Lithospheric Plates
The upper mantle is less rigid because the pressure is lower
That would be the Lithosphere. :D
It's called the lithosphere.
the Lithosphere or Lithospheric Plates
the Lithosphere or Lithospheric Plates