The effects of a high-speed impact on a rock. The extreme temperatures and pressures in a meteorite impact produce a wide range of effects, including fracturing and brecciation, the formation of minerals that are stable only at very high pressures, and heating or extensive melting of the material. Such effects are evident in meteorites, as the results of bombardment of their parent body, and in many lunar rocks. Evidence of shock metamorphism in terrestrial rocks is now regarded as proof of meteoritic impact. On Earth, common forms of shock effects include shatter cones and the formation of shock-induced minerals such as coesite and stishovite.