Continental Crust Emerged 500 Million Years Earlier Than Previously Thought
The first emergence and persistence of the continental crust on Earth during the Archaean Eon (4 billion to 2.5 billion years ago) have important implications for plate tectonics, ocean chemistry, and biological evolution, and it happened about half a billion years earlier than previously thought, according to new research being presented at the EGU General Assembly 2021. ...
