Earth's upper mantle is divided into two major rheological layers: the rigid lithospheric mantle (the uppermost mantle), and the more ductile asthenosphere, separated by the lithosphere-asthenosphere boundary. The lithosphere (that is, the lithospheric mantle and the overlying crust) make up tectonic plates, which move over the asthenosphere.
The mantle is the mostly solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84 percent of Earth’s total volume.
MANTLE definition: a loose, sleeveless cloak or cape. See examples of mantle used in a sentence.
By studying the mantle, we can better predict volcanic eruptions and earthquakes, understand the movement of tectonic plates, and even search for the origins of life on other planets. The mantle also offers tantalizing prospects for energy and resource exploration. Geothermal energy—heat from within the Earth—offers a sustainable power source.
Structure, Composition, and Dynamics The Earth's mantle, a thick layer of semi-molten rock sandwiched between the crust and the core, constitutes the bulk of the planet's volume and mass. This dynamic zone drives key geological processes, including plate tectonics and volcanic activity. What is Mantle of the Earth The mantle is the thick, semi-solid layer of Earth's interior, located between ...