Unique geologic formations found in Western Australia have led a team of researchers to conclude that an asteroid struck the area around 3.57 billion years ago which would make it the oldest such impact site known.

And it wouldn’t be even close. The second-oldest impact crater dates to around 2 billion years before our time.

Located in an area known as the Pilbara in the state of Western Australia, certain formations like “shatter cones” and “pillow basalts,” along with a rising dome shape in the middle of a vast expanse, have convinced Geologist and co-author Tim Johnson that their hypothesis is correct.