The Moon is composed of two major geologic provinces that have a unique origin, composition, and thermal evolution. The Procellarum KREEP Terrane is a large province on the near side of the Moon that has high abundances of KREEP. The Felspathic Highlands Terrane, in contrast is composed predominantly of ancient anorthositic materials. A third terrane, the South Pole–Aitken Terrane, may simply represent deep crustal materials of the feldspathic highlands terrane.
- Bradley Jolliff; Jeffrey Gillis; Larry Haskin; Randy Korotev & Mark Wieczorek (2000). "Major lunar crustal terranes". J. Geophys. Res.: 4197–4216. doi:10.1029/1999je001103.
- G. Jeffrey Taylor (August 31, 2000). "A New Moon for the Twenty-First Century". Planetary Science Research Discoveries.
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