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The spherulitic and variolitic textures of Apollo 12 samples 12063 and 12065, the order of crystallization of all phases, the compositional trends and sector-zoning of the pyroxenes, the chrome partition between phases, the occurrences of metastable minerals, and the wide variations of edge compositions of the olivine and pyroxene suggest that essentially all the crystallization of both rocks took place under highly supercooled conditions at or near the lunar surface. The composition of the original magmas after nucleation of pyroxene and olivine approached those of the present rocks.

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