Tektite

Tektites (from Greek tektos, molten) are natural glass objects, up to a few centimeters in size, which ? according to most scientists ? have been formed by the impact of large meteorites on Earth's surface, although a few researchers favor an origin from the Moon as volcanic ejecta.

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The terrestrial-impact theory states that an impact melts material from the Earth's surface and catapults it up to several hundred kilometers away from the impact site. The molten material cools and solidifies to glass. According to this theory, although a meteorite impact causes the formation the precursor material of tektites is primarily of terrestrial origin, according to isotopic measurements. The color of tektites is black or olive-green and their shape varies from rounded to irregular.

Glass: :For eyeglasses, see glasses. For the drinking vessel, see glass (drinkware)....

Impact: IMPACT Laboratory - International Multi-User Plasma, Atmospheric and Cosmic Dust Twin Laboratory, the premier research facility for plasma and dust research onboard the International Space Station.IMPACT - is a computer graphics architecture for Silicon Graphics computer workstations.Impact - the (...

Meteorite: A meteorite is a small extraterrestrial body that reaches the Earth's surface. While in space these bodies are called meteoroids, and they are called meteors after entering Earth's atmosphere but before reaching the surface. These are small asteroids, approximately boulder-sized or less. When it ent...