Iridium is rare on Earth but common on asteroids ... Chromium, by contrast, is very common on Earth so it could not be correlated to a meteorite impact. Later, scientists found more evidence ...

Using isotopic dating, a team at Purdue University has determined that the “Lafayette Meteorite” likely interacted with liquid water approximately 742 million years ago. It was a long journey ...

Whatever the origin of meteorite diamonds ... much as the famous iridium layer has done? Scientists won't be able to say without further study, but the idea holds promise. (In the 1998 book ...

The date corresponds perfectly to the date of the dinosaur extinction. Rare Metal The metal iridium, which is similar to platinum, is very rare on Earth's surface but is more common in asteroids ...

Exploration during a brief dry period in May 2022 uncovered an array of rare minerals and heightened concentrations of iridium, indicative of the extreme conditions accompanying a meteorite collision.