The Week US on MSN3 个月
Some of Earth's oldest crust is disintegrating. No cause for alarm, folks.
But new research suggests that even the oldest crust is disintegrating due to natural ... by this special form of subduction ...
来自MSN5 个月
Oldest known chunks of Earth's crust discovered deep underground in Australia
The crust is the outside layer of the planet and it's made of solid rock - there are two types of crust, which are oceanic and continental. The mantle is hot, dense, iron and magnesium-rich solid ...