ENVR 1104 Chapter Notes -Caribbean Plate, North American Plate, Supercontinent

• School: Northeastern University
• Department: Earth & Environmental Sciences
• Course: ENVR 1104
• Professor: Malcolm D Hill

Document Summary

Chapter 2: plate tectonics and physical hazards: earth"s composition, core= metallic center (mainly iron and nickel) the heat from the core helps to drive interior processes, mantle= composed of rocks rich in the elements. Ultramafic rocks, with ma = magnesium and f for iron, or fe: crust= thin outer layer composed of many types, oceanic crust= primarily basalt rock. 2 plate, and antarctic plate all move at different velocities: divergent boundaries: Basalt magma is formed in the mantle of the earth, it ascends in diverging plate boundaries; ongoing eruptions cause new symmetry at plate boundaries; spreading boundaries causes new oceanic crust tension stress: convergent boundaries: Converging plate boundaries causes the denser plate to be subducted below the other, this causes a subduction zone compression stress: transform boundaries. Plates slip past one another horizontally : hazards and plate boundaries: shear stress, divergent boundaries: These can be extremely hazardous due to subduction zones; can cause volcanisms and earthquakes: transform boundaries: