Australian Glass Clue: 11-Million-Year-Old Tektites Point to Hidden Impact
Researchers analyzing six Australian tektites—now called ananguites—argue they originated from an 11-million-year-old asteroid impact in a volcanic-arc north of Australia, scattering glass across a roughly 900-km ellipse over South Australia. The crater that caused the event hasn’t been found, likely erased by geology, illustrating how impacts can be inferred from glass rather than a visible crater and adding to Earth’s incomplete impact record.