1 Zone lying between the Earth's crust and core, approximately 2300 km thick. The mantle is probably similar in composition to garnet peridotite and it represents about 84% of the Earth's volume and 68% of its mass. A mantle is present in most terrestrial planets and the Moon, but is of a different composition in each case.
2(pallium) In Brachiopoda and Mollusca, a layer of tissue that covers the body and is responsible for the secretion of the shell.
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