Chapter 1 Notes.docx - Chapter 1 Notes In historical geology we study Changes in our dynamic planet How and why past events happened Origin of Our Solar

Chapter 1 Notes.docx - Chapter 1 Notes In historical...

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Chapter 1 Notes In historical geology we study Changes in our dynamic planet How and why past events happened Origin of Our Solar System Solar nebula formed a rotating disk, condensed and collapsed Terrestrial Planets Mercury Venus Earth Mars Small, composed of rock, with metal cores Jovian Planets Jupiter Saturn Uranus Neptune Large, composed of hydrogen , helium , ammonia , methane , relatively small rocky cores Earth’s Very Early History Started out cool about 4.6 billion years ago probably with uniform composition/density Mostly : silicate compounds iron and magnesium oxides Temperature increased. Heat sources: meteorite impacts gravitational compression radioactive decay Heated up enough to melt iron and nickel
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Earth’s Differentiation Differentiation = segregated into layers of differing composition and density Early Earth was probably uniform
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  • Spring '14
  • Al-Ani
  • Geology

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