Although the radius of the Moon is only about a quarter that of Earth, the lunar crust has a significantly greater average thickness.

The Pre-Nectarian period is defined from the point at which the lunar crust formed, to the time of the Nectaris impact event.

One is a gamma ray spectrometer to map amounts of many chemical elements in the lunar crust.

It forms about one percent of the lunar crust and is present in any rock or meteorite originating from moon.

Certainly," replied Barbicane; "as the internal fires became extinguished, and the incandescent matter concentrated itself, the lunar crust cooled.

With the last comma in the sentence it sounds like FANs formed the lunar crust which doesn't sound right from a cooling perspective.

What is the vertical and lateral structure of the lunar crust and how did it develop?

The collision caused ripples in the lunar crust, resulting in the three concentric circular features.

Why is this not an explanation of the lunar crust being thicker on one side than on the other?

A violent contraction of the lunar crust, while cooling, might suffice to imprint this gigantic star.