How many layers of material form the interior of the Moon?
The seismic data obtained during the Apollo 11- 17 missions has painted a very interesting picture of the lunar interior. Measurements obtained from bouncing radar pulses off the lunar surface, and by calculating the dynamics of man-made satellites orbiting the Moon, also paint their own picture of the lunar interior. The Moon’s interior seems to be less stratified than the Earth’s, and because seismic shocks reverberate for up to an hour or more, the interior cannot be very viscous…molten. The surface is covered by a REGOLITH of shattered rock from innumerable meteor impacts. The depth of this layer is up to 100 meters or so. This is situated on top of the lunar crust or LITHOSPHERE which extends 60 kilometers on the side facing the Earth, and at least 150 kilometers on the back side of the Moon. This crust seems to me richer in titanium and aluminum than Earth crustal rocks. The crust, or at least its outer layer, seems to be poc marked by ‘mascons’ or ‘mass concentrations’ which a
