#shock metamorphism

• Astrobleme — An ancient landform representing a highly eroded, metamorphosed, and partially buried impact structure or crater, created by the crash of a large meteorite, asteroid, or comet onto the Earth's surface. Unlike younger craters, an astrobleme is often identified through gravitational anomalies, the presence of shatter cones, and shock-metamorphosed minerals like coesite or stishovite.