Earth formation By jxqqq 3500 Inner Core Formation There have been many estimates for when the earth's inner core was formed, but scientists have used new data which indicates that the Earth's inner core was formed 1-1.5 billion years ago as it 'froze' from the surrounding molten iron outer core. 3800 End of Heavy Bombardment 4400 Outer Crust Formation 4527 Formation of the Moon 4550 Formation of Earth Period: 4550 to 3500 First billion years of earth Period: 4550 to 4000 Hadean
