The most prominent thermal contrast known to exist in the deep ( 1000 km) mantle is at the core-mantle boundary.
The patch of shadows shifted and Sirella perceived two figures, both wearing long cloaks with deep mantles.
Seismology in particular is heavily relied upon for information about the deep mantle near the core-mantle boundary.
Beneath that chamber is probably another pipe that taps the deeper mantle.
The primary entry was a compositional definition, but two of seven further entries did take me to the deep mantle.
A deep purple mantle wraps around her back and falls across her arms.
As had been expected, the outgassed molten rock started to sink back into the deep mantle from whence it had come.
It rises above a volcanic outbreak in the deep mantle.
In solid rock P-waves travel at about 6 to 7 km per second; the velocity increases within the deep mantle to 13 km/s.
The deeper mantle below the asthenosphere is more rigid again.