Earth's crust today has a surprisingly similar composition to the planet's first outer shell, or "protocrust," new research ...

New research suggests that Earth's first crust, formed over 4.5 billion years ago, already carried the chemical traits we ...

The team's calculations showed the protocrust—Earth's earliest crust formed during the Hadean eon (4.5–4.0 billion years ago)—would naturally develop the same chemical signatures found in ...

Researchers discover Earth's first crust, formed 4.5 billion years ago, had chemical features similar to modern continental crust. (photo credit: Tanya Kalian. Via Shutterstock) A study published ...

there could be movements deep within the Earth’s crust that have resulted in zones of weakness extending all the way to the surface.” “Given the evidence available at present, the best and ...