<P> The temperature of the crust increases with depth , reaching values typically in the range from about 200 ° C ( 392 ° F ) to 400 ° C ( 752 ° F ) at the boundary with the underlying mantle . The crust and underlying relatively rigid uppermost mantle make up the lithosphere . Because of convection in the underlying plastic ( although non-molten ) upper mantle and asthenosphere , the lithosphere is broken into tectonic plates that move . The temperature increases by as much as 30 ° C ( 54 ° F ) for every kilometer locally in the upper part of the crust , but the geothermal gradient is smaller in deeper crust . </P>
<P> The temperature of the crust increases with depth , reaching values typically in the range from about 200 ° C ( 392 ° F ) to 400 ° C ( 752 ° F ) at the boundary with the underlying mantle . The crust and underlying relatively rigid uppermost mantle make up the lithosphere . Because of convection in the underlying plastic ( although non-molten ) upper mantle and asthenosphere , the lithosphere is broken into tectonic plates that move . The temperature increases by as much as 30 ° C ( 54 ° F ) for every kilometer locally in the upper part of the crust , but the geothermal gradient is smaller in deeper crust . </P>
what is the average temperature of the crust
what is the average temperature of the crust
200 ° C ( 392 ° F ) to 400 ° C ( 752 ° F )
200 ° C ( 392 ° F ) to 400 ° C ( 752 ° F )