GGR314H1 Chapter Notes - Chapter 2: Convergent Boundary, Continental Crust, Oceanic Crust
15 Sep 2016
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Chapter 2: matter, energy, and the physical environment (p. 26-53: 45-53. Geological systems: the physical basis for the environment. Core: planet"s centre, mostly iron (solid in the inner core, molten in the outer core, 6000 degrees super hot. 15 major tectonic plates slow movement influences earth"s climate and life"s evolution at least twice in history nearly all landmasses were joined together in supercontinent. There are three main types of plate boundaries divergent plate boundaries move apart from one another: magma rises to the surface forming new crust as it cools and solidifies, ex. Natural geological processes vital to natural functioning of environment but risky when they occur in populated regions: ex. Earthquake along plate boundaries and other places with faults, built up pressure released in fits and starts, each release of energy: submarine earthquakes displace huge volumes of water causing tsunamis. Submarine volcanic eruptions and large coastal landslides also can trigger tsunamis.
