Chemistry, Geochronology, and Petrogenesis of Lunar Sample 15555

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Science  28 Jan 1972:
Vol. 175, Issue 4020, pp. 415-416
DOI: 10.1126/science.175.4020.415


Lunar sample 15555 is a mare type basalt generally similar in chemical composition to the Apollo 12 basalts. Sample 15555 is older than any Apollo 12 basalt but younger than the Apollo 14 basalts analyzed thus far.