Earth's crust ranges from 5 to 70 kilometers in thickness and serves as the planet's outermost layer. This thin shell represents less than one percent of Earth's total mass, yet it's the only layer we ...

The Earth is four and a half billion years old, so why they started appearing then is unknown, as is the mechanism to make ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known ...

Introduction / Robert A. Phinney -- [The upper mantle] -- Upper mantle chemistry and evolution of the earth's crust / Paul W. Gast -- The geophysical importance of high-temperature creep / Dan P.