In terms of plate tectonics, collision boundaries are sites where lithospheric plates move together and the resulting compression causes either subduction (where one or both lithospheric plates are driven down and destroyed in the molten mantle) or...

It took nearly a century for scientists to accept the idea that continents were not forever fixed in their places, but had, in fact, slowly drifted to their current locations. In the 1960s plate tectonics, a further refinement of this concept...

The important geologic theory of plate tectonics (tecton - "to build") asserts that the Earth's surface is composed of about seven major blocks, or plates, and many more minor plates that move across the Earth's surface at a very slow rate. Although...

Plate tectonics is the theory explaining geologic changes that result from the movement of lithospheric plates over the asthenosphere (the molten, ductile, upper portion of the earth's mantle). The visible continents, a part of the lithospheric...

Plate tectonics (from Greek τέκτων, tektōn "builder" or "mason") is a theory of geology that has been developed to explain the observed evidence for large scale motions of the Earth's lithosphere. The theory encompassed and superseded the older...

You don't throw an anniversary party for a killer, but this week Californians are doing just that.Perhaps it's the lack of malevolence. You can't blame the planet for doing what comes naturally, even if it rips cracks in the Earth, topples buildings and people die....

Describes the basic theory of plate tectonics and how it pertains to continental drift. Also discusses the process of convection, the circular movement caused by when a material is heated, expands and rises, then cools and falls.

Describes the theory of plate tectonics and how the theory has changed the way geologists think about the Earth. Details major plates and how the theory helps predicts earthquakes.