Get Instant Summarized Text (Gist) Earth's first crust, formed around 4.5 billion years ago, likely had chemical features similar to today's continental crust, suggesting that the distinctive ...

Earth's crust today has a surprisingly similar composition to the planet's first outer shell, or "protocrust," new research finds. This early rocky shell featured chemical signatures previously ...

Modern continental rocks carry chemical signatures from the very start of our planet's history, challenging current theories about plate tectonics. Researchers have made a new discovery that ...