Science
In northern China, scientists have found what may be the 2 billion-year-old birthmarks of Earth’s first supercontinent – The Conversation AU
A big dip in the Earth’s crust may record an ancient continental collision from the dawn of plate tectonics.

Far beneath the city of Dongshen in northern China, we have discovered what may be the 2 billion-year-old birthmarks of Earths first supercontinent.
An ancient dipping structure in the planets crust appears to be a trace of an early collision between two continental masses like the one that created the Himalaya and may record the origin of the global system of plate tectonics that persists today.
Read more:
How Earth’s continents became twisted and contorted over millions of years
When di…
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