Answer:
High temperatures associated with meteorite impacts
Step-by-step explanation:
When a meteorite impacts the Earth, the high temperatures and pressure from the meteorite impact melt Earth material and splashes it into the Earth's atmosphere, This Earth material falls again due to gravity as a glass shower and partially melts aquiring glassy and aerodinamic forms as they fall to Earth's soil again. Normally they are found near impact craters, composed of silica, alumina, iron, magensium, calcium, potassium and titanium.