Which continent has the oldest exposed rocks on Earth?
Quick Answer
Australia is home to some of the oldest exposed rocks on Earth, including ancient cratons over 3 billion years old.
The Full Story
Some of the oldest exposed rocks on Earth are found in Australia, especially in the Pilbara Craton of Western Australia and the Yilgarn Craton. These regions preserve rocks that formed more than 3 billion years ago, with some zircon crystals dated to about 4.4 billion years old in nearby Jack Hills deposits. The exact oldest exposed rock depends on how scientists define “oldest” and whether they mean whole rock or mineral grains. Australia’s ancient crust gives geologists a rare window into Earth’s earliest history.
Key Facts
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Suggested video title for this topic:
"The oldest rocks on Earth are hidden in one continent—here’s where they are."
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