When I dug holes as a kid, I was scratching away at the very top of Earth’s crust. The mantle, which lies beneath the crust, is much thicker, like the flesh of the apple. It’s made of strong, heavy ...
Detailing the importance of this research, Dr. Zhu states, "Our research quantifies the amount of Earth's crust lost to the mantle during continental collisions, such as those forming the Himalayas.