Composition and origin of lithic fragments and glasses in apollo 11 samples

On the origin of impact glass in the Apollo 16 regolith

“…Impact-produced glass, which occurs in the lunar regolith in a variety of textures and morphologies (spheroidal, ropy, vesicular, shards, and coatings), was the subject of immediate interest when the first lunar samples were studied in laboratories (Chao et al, 1970(Chao et al, , 1972Apollo Soil Survey, 1971;Glass, 1971;Prinz et al, 1971;Reid et al, 1972a,b,c). The interest was undoubtedly sparked in part by its novelty, as glass of impact origin is not a component of most terrestrial regoliths.…”

Niobian Rutile in an Apollo 14 Kreep Fragment

“…The niobian rutile, as well as coexisting minerals in the lithic fragment, were analyzed with an ARL-EMX-SM electron microprobe using chemically analyzed minerals and synthetic compounds as standards and following procedures described by Keil (1967). The bulk composition of the lithic fragment was determined using a broad electron beam, as described by Prinz et al (1971), and using analyzed basalt glassand mineral standards.…”