‘zap pits’ (microcraters) Small craters, ranging in size from less than 1 μm to about 1 cm, on the exposed surfaces of lunar samples, caused by the hypervelocity impact of micrometeorites and dust particles with masses less than about 10−3 g; Typical craters consist of a glass-lined pit, a ‘halo’ zone of fractured material surrounding and underlying the pit, and a spalled zone concentric to the pit. This spallation may leave the glass-lined pit standing on a pedestal.
More From encyclopedia.com
Safety Glass , safe·ty glass • n. 1. glass that has been toughened or laminated so that it is less likely to splinter when broken. 2. (safety glasses) toughened gla… Pyrex , Background Pyrex glass is a borosilicate glass first produced by The Corning Glass Works company. It is made by heating raw materials like silica san… Fiberglass , Background Fiberglass refers to a group of products made from individual glass fibers combined into a variety of forms. Glass fibers can be divided i… Karr, Kathleen 1946- , Kars •arse, baas, brass, carse, class, coup de grâce, farce, glass, grass, Grasse, impasse, Kars, kick-ass, kvass, Laplace, Maas, Madras, outclass, p… Grasse , Grasse •arse, baas, brass, carse, class, coup de grâce, farce, glass, grass, Grasse, impasse, Kars, kick-ass, kvass, Laplace, Maas, Madras, outclass,… Stained Glass , stained glass, in general, windows made of colored glass. To a large extent, the name is a misnomer, for staining is only one of the methods of color…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like