EARTH121 Lecture Notes - Lecture 1: Solar System, Radioactive Decay, Slab Pull
27 Jul 2018
School
Department
Course
Professor
Document Summary
Interior convection: convection of iron outer core and earth rotation produce magnetic field, deflect solar wind, prevent stripping atmosphere, tectonic 10cm/yr, changes occur at edges, affect ocean and climate patterns. Tectonic plates: continents are baggage, crusts are part of conveyor belt, crusts can pull themselves along, thinner crust go beneath bigger ones, happen in oceans, as the plate moves downward, pieces break off, drives convection of mantel. Famous ppl: sir logan, wilson, tectonic plates, steno, principal of horizontality, tongue bone is shark tooth, experiemented via dissections. Layers of earth: crust, oceanic composed of basalt, continental thicker, many rock types, asthenosphere, upper mantle. Increasing pressure counteracts increasing temperature, rocks are stronger, capable of gradual flow: outer core, convection of metallic fe generates magnetic field. Inner core: strong due to immense pressure, rock cycle. Igneous cooled magma crystallization: weathered igneous rocks form sediments, sedimentary sediments compacted by weight lithification, metamorphic sedimentary rocks buried inside earth and subjected to great temperature and pressure.
