Trinitite Wikipedia
Trinitite also known as atomsite or Alamogordo glass is the glassy residue left on the desert floor after the plutonium based Trinity nuclear bomb test on July 16 1945 near Alamogordo New Mexico The glass is primarily composed of arkosic sand composed of quartz grains and feldspar both microcline and smaller amount of plagioclase with small amount of calcite hornblende and augite in a