27 - GEOL 108 Universe Earth Life 18:05 Origin of the...

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GEOL 108: Universe, Earth, Life 18:05 Origin of the Planet and Life: Water on planet came from comet Hydrogen fuels stars; lower density rocks on the outside of earth Earth melted, volcanoes spewed gases on earth, spewed out CO2 and hydrogen sulfide => huge acid rain, carbonic/sulfuric acid Oldest rock is 4.0 billion yrs old Extreme life: green algae bacteria, photosynthesizes, lives and thrives in hostile environment (think of a kitchen sink and all the shit in it) Volcanoes: fuel to dynamic planet HOT: earth melts What causes volcano to blow? Expanding gases—volcanoes have power to erupt debris into earth’s orbit Core Formation: “I’m melting” Inner core, outer core, mantle, crust—inner/outer core capable of conducting electricity Run electrons through wires—MAGNETIC force Melt Zones: asthenosphere of the mantle-cause of plate techtonics Frozen soup put on stove—starts convection Lithosphere above outer core 1 st quakes and volcanoes-crust formation (basalt)- 4.6 b.y.
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  • '06
  • Anderson
  • Archean sedimentary rocks, yrs old Extreme, lower density rocks, dynamic planet HOT, carbonic/sulfuric acid Oldest

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27 - GEOL 108 Universe Earth Life 18:05 Origin of the...

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