(CBS News) A new study suggests that two recent earthquakes may indicate a literal seismic shift in our understanding of tectonic plate movements. Massive earthquakes under the Indian Ocean that took ...

The diagram below shows the structure of the earth. In geography, taking a slice through a structure to see inside is called a cross section. Continental plates are usually quite thick (between 35 to ...

The oldest substantial chunk of Earth’s crust has been found in Greenland, and dates back at least 3.8 billion years. The find is important because it is of a type known as an ophiolite – a signature ...

The Earth's lithosphere is the rigid outer shell of the planet and is broken into several tectonic plates. These plates are in constant motion over the semi-fluid asthenosphere underneath them. Much ...