Topic: Space
Scientists at the University of British Columbia have identified a rare class of meteorite that likely caused the extinction of dinosaurs 66 million years ago. The meteorite, called a CO chondrite, was about 10-15 kilometers wide and hit Earth with a speed of around 64,000 km/h.
Scientists at the University of British Columbia have made a groundbreaking discovery about the dinosaur extinction event that occurred 66 million years ago. They found that a rare class of meteorite called a CO chondrite was likely responsible for wiping out 75% of Earth's species, including nonavian dinosaurs.
The researchers used advanced nickel isotope analysis to narrow down the composition of the deadly Cretaceous-Paleogene meteorite. Dr. Philippe Claeys, who worked on the study as a visiting professor at UBC, explained that CO chondrites are different from other types of meteorites because they contain much less volatile elements like carbon, zinc, water, and sulfur.
The researchers collected samples from a thin layer of clay created across the globe by the impact. They conducted high-precision nickel isotope measurements to determine the composition of the meteorite. The study found that the fine debris thrown into the atmosphere would have been the primary factor in the extinction event, not the sulfur contained in the impacter.
The origin of the world-shattering meteorite remains a mystery. Potential sources include distant, debris-rich regions of the outer solar system or even the outer area of the asteroid belt near Jupiter. CO chondrites make up only 5% of meteorites so far sampled on Earth, and those of the Ornans class are extremely rare.
Why It Matters
This discovery is important for Indian students because it shows how a single event can have a massive impact on our planet's history. It also highlights the importance of understanding the origins of such events to better prepare for future disasters.
Key Facts
- The CO chondrite meteorite was likely around 10-15 kilometers wide and hit Earth with a speed of around 64,000 km/h.
- The impact occurred 66 million years ago and wiped out 75% of Earth's species, including nonavian dinosaurs.
- CO chondrites make up only 5% of meteorites so far sampled on Earth, and those of the Ornans class are extremely rare.
- The study found that the fine debris thrown into the atmosphere would have been the primary factor in the extinction event, not the sulfur contained in the impacter.
- Potential sources of the meteorite include distant, debris-rich regions of the outer solar system or even the outer area of the asteroid belt near Jupiter.
Key Terms
- CO chondrite
- A rare class of meteorite that contains much less volatile elements like carbon, zinc, water, and sulfur.
- Cretaceous-Paleogene impacter
- The massive meteorite that hit Earth 66 million years ago and caused the extinction of dinosaurs.
Implications
This discovery is important for Indian students because it shows how a single event can have a massive impact on our planet's history. It also highlights the importance of understanding the origins of such events to better prepare for future disasters.
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