A new study has challenged the widely accepted view that the continents rose from the oceans about 2.5 billion years ago.
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It suggests this happened 700 million years earlier — about 3.2 billion years ago — and that the earliest continental landmass to emerge may have been Jharkhand’s Singhbhum region.
The study, by researchers from India, Australia and the US, has been published in the journal PNAS.
Scientists have found sandstones in Singhbhum with geological signatures of ancient river channels, tidal plains and beaches over 3.2 billion years old, representing the earliest crust exposed to air.
The researchers studied the granites that form the continental crust of Singhbhum region.
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