Tektite Glass in Apollo 12 Sample

Science  05 Jun 1970:
Vol. 168, Issue 3936, pp. 1209-1210
DOI: 10.1126/science.168.3936.1209


The glassy portion of lunar sample 12013 from Apollo 12 is chemically more like some tektites from Java than like any terrestrial igneous rock. It satisfies all the chemical criteria for a tektite. Tektites are relatively recent and acid rocks, whereas the moon is chiefly ancient and basaltic; hence, tektites are probably ejected volcanically, rather than by impact, from the moon.