ArticlesSpecial Mineral Studies

Morphology and Related Chemistry of Small Lunar Particles from Tranquillity Base

Science  30 Jan 1970:
Vol. 167, Issue 3918, pp. 654-656
DOI: 10.1126/science.167.3918.654


Glass spherules show multiple high-velocity impact craters and are coated with small particles including glass, plagioclase, clinopyroxene, ilmenite, olivine, chromite, rock fragments, and frozen droplets of iron, nickel-iron, and troilite. These spherules passed through an impact cloud of hot fragmental material, condensing iron-rich vapor and high-velocity projectiles. Breccia contains concentric, accretionary lapilli units and appears to be a sintered deposit from a hot lunar base surge generated by impact.