Lunar Crust and Regolith Depths

Regolith depths are 2-8m in the Mare, and possibly 15m or more in the Highlands. Also, the Mare is surprisingly thin, averaging a few 100m thick, increasing to depths of 2-4km in the deep centres of the basins.

The current view is that the luanr crust, some 70km thick on average and containing about 12 percent of the Moon's volume, is shattered down to a depth of a few tens of kilometers. Below about 25 km the fractures have annealed.