Analyses of the oldest terrestrial material found in Western Australia suggest that Earth had cooled enough to form a crust approximately _______ years after the planet was hit by a Mars-sized body.

Question

Quizplus · Accepted Answer

The oldest terrestrial material found in Western Australia is approximately 4.4 billion years old. This suggests that Earth had cooled enough to form a crust approximately 100 million years after the planet was hit by a Mars-sized body.

Analyses of the Oldest Terrestrial Material Found in Western Australia