Slide 1Fe/Ni Fe/Mg Increasing Fe toward core Increasing Si toward surface There are certain trends in Earths chemistry. The crust is relatively depleted in Fe, Mg and enriched…

Slide 1 Convergent boundary – 3 types Slide 2 Slide 3 Ocean-continent convergent boundary Plate of oceanic crust collides with plate of continental crust. Oceanic crust…

Slide 1 (c) McGraw Hill Ryerson 2007 12.2 Features of Plate Tectonics Earth is over 1200 km thick and has four distinct layers.  These layers are the crust, mantle (upper…

Slide 1 Divergent Boundaries Two plates moving AWAY from each other and forming a gap or RIFT. Mostly associated with OCEANIC crust [seafloor spreading = Mid-Atlantic Ridge]…

Slide 1 Slide 2 Slide 3 100 200 400 300 400 Earth Layers Heat Transfer Continental Drift 300 200 400 200 100 500 100 Seafloor Spreading Plate Boundaries 200 300 400 100 500…

Slide 1 Essential Questions How does the movement of Earth’s tectonic plates result in many geologic features? What are the three types of plate boundaries and the features…

TECTONIC PLATES Ch 12.2 A Cross-Section of Earth The Layers of Earth Earth is over 1200 km thick and has four distinct layers: Crust â outer solid rock layer (granite on…

PLATE TECTONICS PLATE TECTONICS Chapter 8 Magnetism Evidence that supports the theory comes from the magnetic properties and ages of igneous rock on the ocean floor. Some…

Andrija Mohorovicic´ The first velocity discontinuity discovered was named for its discoverer. Most people now use a shortened form of the name and call this boundary…

Seafloor Spreading Theory Seafloor Spreading Theory Explains how ocean crust is formed at ocean ridges and destroyed at deep- sea trenches Supports Wagenerâs continental…