Planet EarthHighland AnorthositeReturn to Earth |
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When the moon first formed it probably had a surface composed mostly of feldspar-rich igneous rocks. This rock type still exists today and makes up the lunar highlands, which is the lighter-colored part of the moon visible from Earth. This 4.4-billion-year-old rock sample is an anorthosite collected from the lunar highlands of the moon by Apollo 16 astronauts.
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