The study focuses on the Cretaceous-Paleogene (K-Pg) boundary layer, a global sedimentary layer rich in platinum-group metals that captured the impact event that led to the extinction of about 70% of Earth’s species. After analyzing the isotopic composition of ruthenium, a platinum-group metal, the scientists determined that the asteroid was a carbonaceous species formed far from the Sun.
These new findings contrast with the more common S-type asteroids, which mostly originate from the inner Solar System and have collided with Earth within the last 500 million years.
Source: Ferra
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