Explained giant meteorite impacts created continents study shows
A new Curtin University study has found the most robust evidence yet showing that Earth’s continents were formed by giant meteorite impacts.The paper, ‘Giant impacts and the origin and evolution of continents’, was published in Nature on August 10.
Dr Tim Johnson from Curtin’s School of Earth and Planetary Sciences, who is one of the study’s authors, said: “By examining tiny crystals of the mineral zircon in rocks from the Pilbara Craton in Western Australia, which represents Earth’s best-preserved remnant of ancient crust, we found evidence of these giant meteorite impacts.”
These impacts were prevalent during the first billion years or so of the planet’s history.
“Studying the composition of oxygen isotopes in these zircon crystals revealed a ‘top-down’ process starting with the melting of rocks near the surface and progressing deeper, consistent with the geological effect of giant meteorite impacts. Our research provides the first solid evidence that the processes that ultimately formed the continents began with giant meteorite impacts,” Dr Johson added.
He said that understanding the formation and ongoing evolution of the Earth’s continents was crucial given that these landmasses host the majority of Earth’s biomass, all humans and nearly all of the planet’s important mineral deposits.
While the hypothesis has been there for decades, so far there was no solid evidence to back it.
The researchers now plan to test the findings from Western Australia on other ancient rocks and see if the model is more widely applicable.
Stay updated with The Hindu Editorial Vocab24 app, your definitive source for breaking news and comprehensive coverage from India and around the globe. Whether it's political developments, business updates, sports highlights, the latest technology trends, or current events, The Hindu brings live, accurate, and reliable news directly to your device.
Don’t fall for sensationalized or fake news shared online. Read and share accurate updates with friends and family through The Hindu Editorial Vocab24 app. Download it today!
News Coverage in The Hindu Editorial Vocab24 App
Breaking News: Receive instant notifications on breaking news stories as they unfold. Stay informed about major events and developments in India and around the world with live blogs, news in shorts videos, and concise articles.
Politics: Get the latest updates on Indian politics, including elections, policy changes, government decisions, and political events that shape the nation.
Business and Economy: Stay ahead in the economic landscape with detailed business news and market analysis. Learn about stock market trends, financial reports, corporate news, and economic developments to make informed investment decisions.
Current Events: Follow stories on social issues, policy changes, global events, and daily current affairs, tailored for UPSC and other competitive exam preparations.
Technology: Keep up with the latest gadgets, innovations, and tech trends. Read expert reviews and analyses in short, concise updates on cutting-edge technology from India and beyond.
Sports: Never miss a moment of your favorite sports. Get live scores, match reports, and expert analysis on cricket, football, tennis, and more.
International News: Stay informed about global events and geopolitical developments, including the Russia-Ukraine war, Israel-Palestine conflict, and other key international stories.
Local News: Stay connected to your community with the latest updates on city events, issues, and local news. Coverage includes hyperlocal updates from cities like Bangalore, Chennai, Delhi, Hyderabad, Mumbai, Kolkata, and more.
Trending Topics: Discover what's trending today with the most talked-about stories and hot topics across India and the world.
Experience journalism that values integrity, accuracy, and reliability. Download The Hindu Editorial Vocab24 app today and stay connected with the world.
Subscribe to our newsletter!
