Hadley–Apennine

Hadley–Apennine is a region on the near side of Earth's Moon that served as the landing site for the American Apollo 15 mission, the fourth manned landing on the Moon and the first of the "J-missions", in July 1971. The site is located on the eastern edge of Mare Imbrium on a lava plain known as Palus Putredinis. Hadley-Apennine is bordered by the Montes Apenninus (often referred to as 'Apennine Front'), a mountain range, and Hadley Rille, a meandering channel, on the east and west, respectively.

Data obtained from the composition of soil samples collected on Apollo 15 show that most (about 90%) of the samples from the Apennine Front are brown-glass breccias, and approximately 60-70% obtained from the mare surface are basalt. Although the basalts seem to vary in their texture, their ages appear to be approximately the same. Most of the samples obtained on the Apennine Front are KREEP (potassium, rare earth elements, phosphorus) materials, anorthosites, recrystallized norite, or recrystallized breccia.

Hadley-Apennine is located west of the Montes Apenninus and east of Hadley Rille. The Apennine mountains form a 15,000 foot (4,600 m) escarpment that rises higher above the Hadley plain than the Himalayan front above the plains of India and Nepal. Hadley Rille (also referred to as Rima Hadley) is located to the west of the Apollo 15 landing site and was the subject of substantial investigation during that mission. The feature, named from nearby Mons Hadley, is a channel that was likely formed by volcanic processes earlier in the history of the Moon.

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