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orthopyroxene granite
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Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
(Bed) Rocks and (Flint) Stones
Quick Facts
Related Topics:
charnockite
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orthopyroxene granite

rock
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

orthopyroxene granite, member of the charnockite (q.v.) series of metamorphic rocks.

This article was most recently revised and updated by John P. Rafferty.