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Lecture 4

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Department
Geography
Course
GGR378H5
Professor
Barbara Murck
Semester
Summer

Description
Lecture #4 Geophysical Hazards: Introduction  Living on Earth’s surface  Framework for Geophysical Hazards: How Earth works  Earth’s interior  Theory of plate tectonics  Convection  Plate tectonic environments Living on Earth’s Surface  Intersection of internal & external processes  Internal processes influence:  Topography and landscape (uplift vs. degradation)  Composition of the atmosphere and hydrosphere  Atmosphere/ocean & climate/weather processes  Location, frequency and magnitude of hazards  Earthquakes  Volcanic eruptions  Landslides  Tsunami  Weather-related hazards  Coastal hazards Earth’s Interior Earth’s surface is modified by plate tectonics.  Earth is hot inside  Core, mantle, crust  Outer layer is thin, relatively cold  Lithosphere (crust + outer part of mantle)  Brittle; easily broken  Hot mantle is overlain by thin, cold, brittle lithosphere  Heat has to escape from insi
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