from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The outer part of the earth, consisting of the crust and upper mantle, approximately 100 km (62 mi.) thick.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The rigid, mechanically strong, outer layer of the Earth; divided into twelve major plates
from the GNU version of the Collaborative International Dictionary of English
- n. The solid earth as distinguished from its fluid envelopes, the hydrosphere and atmosphere.
- n. The outer part of the solid earth, the portion undergoing change through the gradual transfer of material by volcanic eruption, the circulation of underground water, and the process of erosion and deposition. It is, therefore, regarded as a third mobile envelope comparable with the hydrosphere and atmosphere.
from The Century Dictionary and Cyclopedia
- n. The crust of the earth: a designation corresponding with atmosphere and hydrosphere. [Little used.]
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the solid part of the earth consisting of the crust and outer mantle
Plate tectonics is the scientific theory that describes the movement of Earth's upper mantle and crust, known as the lithosphere.
The lithosphere is a layer that includes the crust and the upper most portion of the asthenosphere (Figure 2).
A list of the solid substances of the earth making up the so-called lithosphere (or rock sphere) in order of their abundance, does not at all correspond to a list made in order of commercial importance.
The lithosphere is the more or less stable crust of the earth, which may have been, to begin with, about fifty miles in thickness.
The Crust: The crust or the lithosphere is the outermost layer of the Earth made up of silicate rock materials.
Our work shows that the lithosphere, that is, the solid rock part, plays a very important role in regulating the surface evolution of the Earth.
Together the crust and upper mantle are called the lithosphere and they extend about 80 km deep.
Changes in the lithosphere created major land masses and extensive shallow seas.
They travel at a speed of about 5 to 7 kilometers per second through the lithosphere and about 8 kilometers per second in the asthenosphere.
Body waves are seismic waves that travel through the lithosphere.