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A summary of lunar geology. Light feldspathic rocks which constitute the highland areas are components of the primeval crust of the Moon. Dark pyroxeneand ilmenite-rich basaltic lava flows - resulting from partial melting processes in the lunar mantle - filled the Maria basins, 3.1-3.9 × 10 years ago. Craters of all sizes and large circular basins were formed by impacting bodies from outside which produced the regolith blanket - a mass of comminuted rocks with fragments of impact breccias, impact melt glasses and impact melt rocks. [ABSTRACT FROM AUTHOR]

It is doubtful that large-scale industrial utilization of the fast breeding reactor will ever be possible. It is, however, probable that the thorium reactor, for which three plans already exist, will be realized. There is enough thorium to supply thorium reactors up to the next glacial period. [ABSTRACT FROM AUTHOR]