Scientists have discovered a previously unknown asteroid impact hidden in tiny glass fragments scattered across South Australia.
Scientists have contributed to the discovery of evidence for a massive and previously unknown asteroid strike, revealed not by a crater but by tiny fragments of glass found only in Australia.
These fragments are tektites, a rare type of natural glass that forms when an asteroid collides with Earth, heating and melting surface rocks before launching them across vast distances. This newly identified variety of tektites has so far been discovered only in a region largely within South Australia.
Uncovering a new tektite field is like opening a new chapter in the planet’s dramatic geological history.
“These glasses are unique to Australia and have recorded an ancient impact event we did not even know about,” Professor Jourdan said.
“They formed when an asteroid slammed into Earth, melting surface rock and scattering debris for thousands of kilometers. These tiny pieces of glass are like little time capsules from deep in our planet’s history.
“What makes the discovery even more intriguing is that, although the impact must have been immense, scientists are yet to locate the crater.
“Understanding when and how often large asteroids have struck Earth also helps us assess the risk of future impacts, which is important for planetary defense.”
