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Moon rock
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Breccia sample returned from the Moon by Apollo 15 astronauts in 1971. This sample was found at Spur Crater at the foot of the Apennine range near the Mare Imbrium. It is composed of broken and shock-altered fragments that were fused together after an impact of a large object created the Imbrium Basin. (Top) Basalt and (bottom) breccia samples returned from the Moon by Apollo 15 astronauts in 1971.The dark basalt rock, collected near Hadley Rille on the edge of the Imbrium Basin (Mare Imbrium), is about 13 cm (5.1 inches) long and is representative of the mare lavas that filled the basin 3.3 billion years ago, several hundred million years after the impact that created Imbrium. Its numerous vesicles were formed from bubbles of gas present in the lava when it solidified.The breccia sample, which measures about 6 cm (2.4 inches) across, was found at Spur Crater at the foot of the Apennine range, part of the material pushed up by the Imbrium impact. Dating from the formation of Imbrium, it is composed of broken and shock-altered fragments fused together during the impact. Moon rock crystals
What do rocks collected during Apollo 11 reveal about the Moon and beyond?
Learn more about the Nice model of solar system evolution and how samples brought back from the Moon fit within it
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Videos

What do rocks collected during Apollo 11 reveal about the Moon and beyond?
An overview of Apollo 11's landing on the Moon, including the continuing scientific...
Video: Β© Open University (A Britannica Publishing Partner)
Learn more about the Nice model of solar system evolution and how samples brought back from the Moon fit within it
A discussion of the Nice model (named for Nice, France) of the formation of the orbital...
Video: Β© Open University (A Britannica Publishing Partner)

Images

Breccia sample returned from the Moon by Apollo 15 astronauts in 1971. This sample...
NASA/Lunar Planetary Institute
(Top) Basalt and (bottom) breccia samples returned from the Moon by Apollo 15...
NASA
Moon rock crystals
A scanning-electron-microscope photograph of pyroxene and plagioclase crystals (the...
NASA