GEOG 101 Lecture Notes - Lecture 13: Plate Tectonics, Canadian Shield, List Of U.S. States And Territories By Elevation
Document Summary
Plates may move up to 10cm or more per year. Result of the mobility of the asthenosphere. Result of the convection occurring in the upper mantle. Denser ocean crusts will grind beneath the less dense continental crust. Gravitational force tends to pull the ocean crusts down. Helps with the process and mobility of the surface crusts. Occur where we have clashing of the plates. **greatest amount of volcanic activity occurs at the plates. Average elevation of the earth relative to the surface area of the earth. Suggests that the highest mountain on earth is everest. Suggests that the greatest trench is 11,030m. Blocks in place and then landform took shape. Opposing forces building and weathering crust. 1 residual mountains and stable cratons. When plates are moving about and colliding, cratons remain the same over time, and the other areas change around them. Usually through erosion, and then forms terrains.
