The temperature where the lithosphere transitions into the asthenosphere would be about 600ºC to 1200ºC. That is where peridotites, or mantle rocks, start to become soft. The lithosphere is about 100 kilometers deep. More »

The lithosphere is the solid, outer layer of the Earth, and it is around 100 kilometers thick. It consists of the brittle upper portion of the crust and mantle. It is divided into huge sections called tectonic plates, on... More »

The temperature of the asthenosphere begins at a little over 1,600 degrees Fahrenheit but does not rise above 6,700 degrees F. It lies beneath the lithosphere or crust of the earth and the more rigid part of the upper ma... More »

The lithosphere is the very top layer of the Earth's crust, while the asthenosphere is the semi-fluid layer just beneath it. The asthenosphere is found between 50 to a few hundred miles below the lithosphere. More »

The temperature of the asthenosphere begins at a little over 1,600 degrees Fahrenheit but does not rise above 6,700 degrees F. It lies beneath the lithosphere or crust of the earth and the more rigid part of the upper ma... More »

The asthenosphere is made up of mafic and ultramafic rocks. It has the same material as the upper lithosphere, but the material in the asthenosphere is in a plastic, viscous state and moves around much more readily than ... More »

The asthenosphere has no exact size, but the United States Geological Survey estimates it is approximately 111.85 miles (180 kilometers) thick. It is highly ductile meaning that it can change shape and therefore thicknes... More »