Lunar regolith at tranquillity base.
The regolith at Tranquillity Base is a layer of fragmental debris that ranges in thickness from about 3 to 6 meters. The thickness of the regolith and the exposure histories of its constituent fragments can be related, by means of a relatively simple model, to the observed crater distribution.
Shoemaker
E M
EM
Hait
M H
MH
Swann
G A
GA
Schleicher
D L
DL
Dahlem
D H
DH
Schaber
G G
GG
Sutton
R L
RL