ENV100Y5 Chapter 5: ENV100Y5 Chapter : ENV100Y5 Lecture :
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ENV100Y5 Full Course Notes
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2 options: intraplate: middle of the plate. Geologically quiet ; volcanoes and earthquakes aren"t as dramatic or drastic. New crust is created: oceanic (mid-atlantic ridge) or continental (east. Ocean-continent subduction zone (ex; andes) oceanic-oceanic subduction zone. Crust is not created or destroyed, simply moving past each other. Only earthquakes, no volcanoes in this environment. The focus of these earthquakes are not deep, they are shallow; this can cause damage and shaking of the surface. Earth is not homogeneous, so not the same all the way through. Internal layering is defined by: differences in physical properties, differences in composition. Drill deep holes and see if we can get to the next layer. Xenoliths (usually green and found in basalt) = "foreign rocks"" associated with diamonds. Earthquakes are the best way to determine what is happening inside a planet: Earthquakes occur as a result of build-up and release of strain energy in rocks subjected to tectonic forces.
