The Moon's geology is entirely igneous/impact-related (anorthosite highlands, mare basalts, norite and related plutonic rocks), with no significant liquid water or atmosphere ever present to enable sedimentary rock-forming processes like those that produce sandstone on Earth.
Anorthosite (lunar highland crust), norite (a related plutonic rock found in lunar samples), and basalt (mare basalts) are all well-documented lunar rock types formed by...
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