Mantle (geology)

Mantles are made of rock or ices, and are generally the largest and most massive layer of the planetary body.

[1] Mars's silicate mantle is approximately 1,600 kilometers (990 miles) thick, constituting ~74–88% of its mass,[1] and may be represented by chassignite meteorites.

Uranus and Neptune's ice mantles are approximately 30,000 km thick, composing 80% of both masses.

[1] The silicate mantle of the Earth's moon is approximately 1300–1400 km thick, and is the source of mare basalts.

[4] The lunar mantle contains a seismic discontinuity at ~500 kilometers (310 miles) depth, most likely related to a change in composition.