Science / Geology / Mantle: The main bulk of the Earth, between the crust and core, ranging from depths of about 40 to 3480 kilometers. It is composed of dense mafic silicates and divided into concentric layers by phase changes that are caused by the increase in pressure with depth.

Other Words for Mantle

Mantle Noun Synonyms: cover, clothe, envelop, surround, encircle, shroud, veil, screen, obscure, cloak, conceal, hide, mask, wrap, disguise
Mantle Verb Synonyms: cloak, cape, wrap, shawl, pelisse, pelerine

Mantle Plume

Science / Geology / Mantle Plume: A rising mass of hot mantle material that can create an area of volcanic activity in the center of a lithospheric plate. MORE

Hot Spot

Science / Geology / Hot Spot: A volcanic center located within a lithospheric plate that is thought to be caused by a plume of hot mantle material rising from depth. MORE


Science / Geology / Kimberlite: A variety of peridotite that is found in volcanic pipes which are thought to be intrusions from the upper mantle. Many diamond deposits are found in kimberlite pipes. MORE


Science / Geology / Isostasy: A condition of gravitational balance (similar to floating) in which a mass of lighter crustal rocks are buoyantly supported from below by denser mantle rocks. The crustal rocks above subside into the MORE

Thorium (Th)

Science / Periodic Table of Elements / Thorium (Th): Atomic number: 90, Atomic mass: 232.04 g.mol -1, Electronegativity: 1.3, Density: 11.72 at 20°C, Melting point: 1750 °C, Boiling point: 4790 °C, Vanderwaals radius: 0.182 nm, Ionic radius: 0 MORE


Science / Biology / Lithosphere: The solid outer layer of the Earth; includes both the land area and the land beneath the oceans and other water bodies. MORE