Plate Boundaries: Three types differentiated

 What are the lithospheric plates and how do they interact?

The cool, rigid outer layer of Earth is highly fractured. In most places, huge chunks or pieces of this rigid outer layer, called plates, are in continuous motion. Plates can range from 50 km to 200km thick. Continental plates are thicker and less dense than oceanic plates that are formed at spreading ridges.

Viewers will learn to define a tectonic or lithospheric plate; differentiate between continental and oceanic plates; differentiate between the 3 types of plate boundaries; and learn about the generalized seismicity associated with boundaries.


Keypoints:

Discovery

  • What forces are acting on the earth that result in different types of plate boundaries?
  • Can you name three basic types of faults?
  • Is a reverse fault caused by tension, extension or shearing?

 

Date: September 29, 2016
Total Time: 6min 40s
Level: Intermediate

25MB

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